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RAV4 Hybrid sounds explained: which noises are normal and which aren't

The brake pump whir, the clank under the back seat, the hum after you park, rusty brakes and an engine that keeps running. Here's what each RAV4 Hybrid sound is and when each sound means something's wrong.

LB
by Lance, RAV Buddy
Updated Oct 15, 2026
2019202020212022202320242025
So on every 2020 to 2026 RAV4 Hybrid, RAV4 Prime and 2026 Plug-in Hybrid, Toyota's owner's manuals list these sounds as normal. There's a whir from the brake pump when you open the driver's door or press the brake. There's a clank under the back seat when the car turns on or off. And there's a whir from the parking brake, plus a hum under the car about five hours after you park. And a scrape or grind from the brakes on the first few stops after the car sits is normal too. That's light rust on the brake discs, and it shows up more on a hybrid. But a brake pump that keeps running, grinding that doesn't clear, or any brake or hybrid warning means it's time for the dealer. And if you have a 2019 RAV4 Hybrid, check recall 19V544000 for the brake booster pump.

Quick picks

🚪A whir when you open the driver's doorThat's the brake pump getting readyNormal 🌙A hum under the car hours after you parkThat's Toyota's fuel vapor checkNormal 🌧️Grinding on the first few stops after rainThat's surface rust on the brake discsUsually normal ⚠️A pump that runs again and againHave the brakes checkedDealer visit

The RAV4 Hybrid sounds Toyota's manual says are normal

So every 2020 to 2026 RAV4 Hybrid and plug-in owner's manual has a box called "Sounds and vibrations specific to a hybrid vehicle." The newer manuals end the box title with "Hybrid Electric Vehicle" or "Plug-in Hybrid Electric Vehicle" instead. Toyota says every sound in that box is not a malfunction. The table below puts that box in plain words, along with the other sounds Toyota calls normal in other parts of the manual. The wording comes from the 2023 to 2025 RAV4 Hybrid manual, and the other years match.

What you hear or feelWhen it happensWhere it comes from
A whir or motor soundWhen you open the driver's door, and when you press the brake pedalThe brake system, at the front of the car
An operating soundOne or two minutes after you turn the car offThe brake system, under the hood
A snap or soft clankWhen you turn the car on or offThe hybrid battery relays, under the back seat
A fanAny time the hybrid battery's fan runsThe hybrid battery's cooling fan, at the air vent under the back seat
Sounds from the hybrid systemWhen the liftgate is openThe hybrid system
A whine or hum from the electric motors. One owner says the hum sounds like a distant siren.When you lift off the gas or press the brakeThe electric motors as they slow the car, which Toyota calls regenerative braking
Transmission soundsWhen the gas engine starts or stops, at low speed, or sitting stillThe hybrid transmission
A shudderWhen the gas engine starts or stopsThe gas engine
A loud engineWhen you speed up hardThe gas engine
A whirWhen you shift into P or out of PThe electronic parking brake motors on the back brakes
A hum for several minutesAbout five hours after you turn the car offThe fuel vapor leak check, under the car
A hollow, spaceship-like humUnder about 22 mph with the gas engine off, louder in reverseThe pedestrian warning speaker, at the front of the car
No sound at allSitting in READY with the gas engine offNothing is wrong. The car is on and can move.

And something to note is the last row, where the car makes no sound at all. Basically, a RAV4 Hybrid can be fully on and silent. So Toyota says to shift to P and set the parking brake whenever you park.

Now if you have a gas RAV4, you won't hear the brake pump whir, the pedestrian warning sound or the clank under the back seat. But the gas RAV4 does get the five-hour hum and the parking brake whir.

The whir when you open the driver's door or press the brake

So the RAV4 Hybrid, the RAV4 Prime and the 2026 RAV4 use what Toyota calls an electronically controlled brake system. Basically, there's no engine vacuum to help you push the brake pedal, so an electric pump builds the pressure instead.

And Toyota lists three brake system sounds as normal:

Now on a RAV4World thread, a new 2024 RAV4 Hybrid XLE owner asked about a buzzing noise for a couple of seconds when they opened only the driver's door. Other owners said the buzz is the brake system building pressure. Some forum posters say the whir is the fuel pump. But Toyota's manual says the whir is the brake system.

And the antilock brakes and stability control make their own sounds. Toyota says you may hear a sound under the hood when you press the brake again and again, when you turn the car on, or right after you start moving. And when the antilock brakes or stability control kick in, you may feel a shudder through the car and the steering wheel. You may even hear a motor after the car stops. Radar cruise control can make a brake sound and change how the brake pedal feels too, and Toyota says that's normal.

The whir when you shift into park

So the RAV4 has an electronic parking brake, with a small motor on each back brake. Toyota's manual says you may hear a whirring motor when the parking brake works, and that's not a malfunction.

And the RAV4 comes from the factory with the parking brake's automatic mode on. So you'll hear the parking brake whir every time you shift into P and every time you shift out of P. Steve Clifford's video below shows the motor on a RAV4 up on a lift.

The clank and the fan under the back seat

So the hybrid battery sits under the back seat on the RAV4 Hybrid. When you turn the car on or off, the battery's relays click on or off, and Toyota describes that as "a snap or soft clank." Basically, a relay is an electrical switch, and the relays connect the hybrid battery to the rest of the car.

And the hybrid battery has a cooling fan that pulls air in through a vent under the back seat. So a fan sound from back there is normal too.

The spaceship sound at low speed and in reverse

So under about 22 mph with the gas engine off, the RAV4 Hybrid plays a hum so people walking nearby can hear the car coming. You can't turn the warning sound off. I cover the warning sound fully, with the reverse beeps, in my RAV4 beeps guide.

Now something worth knowing is that people often mistake the hum for rusty or squealing brakes. Steve Clifford, who works at a Toyota dealer, says so in the video below. So here's a simple way to tell the warning sound from the brakes. If the "brake noise" stops the moment the gas engine starts, the noise is the warning sound, not the brakes.

And the sound comes from a speaker at the very front of the car. Toyota says the front speaker makes the sound harder to hear for people behind the car. If the speaker fails, the gauge screen shows "Proximity Notification System Malfunction Visit Your Dealer." On the 2026, the message reads "Acoustic Vehicle Alerting System Malfunction Visit your Dealer."

The hum under the car after you park

So about five hours after you turn the car off, you may hear a sound under the car for several minutes. Toyota says that's a fuel evaporation leak check, and it's not a malfunction. Basically, the RAV4 checks that no fuel vapor is leaking from the gas tank system.

And the five-hour hum isn't just a hybrid thing. Toyota's gas RAV4 manual has the same note. One 2023 RAV4 Hybrid owner called the hum "a little eerie the first time you encounter it." So here's every normal sound a RAV4 Hybrid makes with the car off, in order:

  1. When you walk up and open the driver's door, a whir from the front. That's the brake pump getting ready.
  2. Right when you turn the car off, a snap or soft clank under the back seat. That's the hybrid battery relays.
  3. One or two minutes after you turn the car off, a sound under the hood. That's the brake system.
  4. About five hours after you turn the car off, a hum under the car for several minutes. That's the fuel vapor check.

But some sounds with the car off aren't normal. A pump that runs over and over with the car off and locked, a fan that runs for a long time, or a loud screech is worth a dealer visit. On the Toyota Owners Club forum, one 2019 RAV4 Hybrid owner had a screech from the vents a few seconds after turning the car off. A new blower motor didn't fix the screech. So if a sound keeps going with the car off, take a phone video with sound for the dealer.

Grinding or squealing brakes after the car sits: rusty discs

So brake discs, also called rotors, are the metal plates the brake pads squeeze to stop the car. Brake discs are cast iron, and cast iron slowly builds up surface rust when the car sits. Toyota says so itself in its storage bulletin for dealers, T-SB-0009-19.

And Toyota's advice to dealers for cars that sit is to drive the car at least once every 2 months. On that drive, Toyota says to stop normally from about 30 mph at least 20 times. Toyota adds that severe rust can make the discs uneven and cause brake vibration, and then the discs may need resurfacing.

Now Toyota's owner's manual has a car wash tip too. Toyota says rust can form if you park with wet brakes, and the rust can make the brakes stick. So after a wash, drive slowly and press the brakes a few times before you park. I cover that in my car wash checklist. And after you drive through a puddle, Toyota says to press the brake lightly to make sure the brakes work.

Why a hybrid shows more rust on the brake discs

So on a RAV4 Hybrid, the electric motor does most of the slowing when you lift off the gas or press the brake. Toyota calls that regenerative braking. Basically, the pads touch the discs less, so the rust doesn't get wiped off as often. Toyota doesn't say that about rust in any RAV4 document. That's owner and mechanic reasoning. The same goes for a RAV4 Prime or a 2026 Plug-in Hybrid driven mostly in EV mode.

And something to note for new-car buyers is that Toyota started shipping new cars with film over the wheels to keep rust off the discs before delivery, in bulletin T-SB-0038-24. So rust on a brand-new RAV4's discs can come from the dealer lot.

When rusty brake discs are normal and when they aren't

The list below comes from owners and mechanics, except where a line says Toyota.

What RAV4 Hybrid owners say about rusty brake discs

So on RAV4World, a Northeast owner posted photos of rust lines on their RAV4 Hybrid's discs at about 2,000 miles. Four owners said the rust was normal. Two owners said one disc's scoring was worth pulling the wheel to check the pad and the slide pins. And a 2023 RAV4 Hybrid XSE owner said: "If you USE your friction brakes you won't have rust in the active areas."

And in another thread, a 2025 RAV4 Hybrid XLE bought in November 2025 let out a loud metal-to-metal scream in a hard stop. Owners said the scream was either the antilock brakes working or rust on the discs.

Now owners clear the rust with a few firm stops now and then on an empty road, where it's safe. And keep in mind that the rusty ring at the edge of the disc stays no matter what, and that's fine. I cover keeping rust off the rest of the car in my RAV4 rust protection guide.

Toyota's tech tips for RAV4 brake squeaks, startup sounds and other noises

So a tech tip is a short note Toyota sends dealer technicians about a known problem. A bulletin, or TSB, is Toyota's repair instructions for a known problem. My RAV4 road noise guide lists the main noise bulletins, including T-SB-0001-22 for a front brake squeal on the 2019 to 2025 RAV4 and RAV4 Hybrid. Here are Toyota's other tech tips and bulletins for brake squeaks and startup sounds, plus two more 2019 and 2020 RAV4 noise tech tips:

And something to note is that the NHTSA's list of Toyota bulletins has none for a groan from the RAV4 Hybrid's brake booster or brake actuator.

When a RAV4 Hybrid brake sound means something's wrong

The 2019 RAV4 Hybrid brake booster pump recall

So the 2019 RAV4 Hybrid has a recall for the brake booster pump, NHTSA recall 19V544000. Toyota's code for the recall is K1L or K0L. Basically, the pump may fail, which turns off stability control and takes away the power assist on the brakes. The dealer checks the pump and replaces it if needed, for free.

And if you're buying a used 2019 RAV4 Hybrid, run the VIN through the NHTSA's recall lookup. I cover how in my used RAV4 buying guide, and the recall is also in my RAV4 years to avoid guide.

How rare a failing RAV4 Hybrid brake pump is

So brake pump complaints are rare. The NHTSA has more than 2,800 owner complaints for the 2019 to 2026 RAV4, RAV4 Hybrid, Prime and Plug-in Hybrid. Only 2 were about the brake pump or the brake actuator.

Signs a RAV4 Hybrid brake sound isn't normal

A simple check for the brake pump

So this check comes from a mechanic's video about Toyota hybrids in general, not a Toyota RAV4 procedure. But it's an easy way to tell a normal whir from a pump that's working too hard.

  1. Turn the car on without your foot on the brake, so the dash lights up but READY doesn't come on.
  2. Let the first whir finish. One whir of 3 to 5 seconds is normal.
  3. Sit quietly for 60 seconds. Silence means the brake system is holding pressure.

And if the pump runs again every 15 to 30 seconds, the system isn't holding pressure. If the whir turns into a bark or a squawk, the pump motor is struggling. And if the pump stops working completely, you still have brakes, but the pedal gets very hard to push. So a pump that cycles, barks or quits is worth a dealer visit.

What the warranty covers on RAV4 Hybrid brakes

So in Toyota's 2025 RAV4 Hybrid warranty guide, worn brake pads are never covered, and neither is damage from road salt. But the brake booster and the brake actuator fall under the basic 3-year, 36,000-mile warranty. And in California and the states that follow California's emissions warranty, the guide covers the brake master cylinder and the brake system control module for 7 years or 70,000 miles.

Why the RAV4 Hybrid's gas engine won't shut off

So most of the time, a gas engine that keeps running is normal. The RAV4 Hybrid runs the engine to warm up, to charge the hybrid battery, when the hybrid battery is too hot or too cold, and when the heater is on. I cover all of that in my RAV4 Hybrid mpg guide and the hybrid section of my auto start stop guide.

And if the EV button won't work in the cold, my RAV4 Hybrid drive modes guide explains why. On a RAV4 Prime or 2026 Plug-in Hybrid, the engine starts for heat below about 14°F (-10°C), or when you press the windshield defogger button. I cover that in my RAV4 Prime drive modes guide. And after the 12-volt battery dies or gets replaced, the engine may not stop for a while. If that lasts a few days, Toyota says to contact the dealer. I cover that in my 12-volt battery guide.

The engine revs going down a long hill

So the 2026 RAV4 Hybrid manual lists driving down a long hill as a time the engine may keep running. Owners explain the revs like this. When the hybrid battery is nearly full and can't take more charge, the system spins the gas engine with the fuel off to help hold the car back. So you hear the engine rev going down a mountain pass, but no gas is burning. The "fuel off" part is owner explanation, not Toyota's wording.

And the 2023 to 2025 manual backs the idea up. With navigation route guidance on, the RAV4 Hybrid lowers the hybrid battery before a long downhill, so the battery has room to charge. Toyota calls that Predictive SOC control. SOC is short for state of charge, which means how full the hybrid battery is.

Engine revs that don't match your speed

So the RAV4 Hybrid has no tachometer, which is the gauge that shows engine speed. And one 2022 RAV4 Hybrid Limited owner said the engine can sit at 2,500 rpm at a stop. That same owner said the engine can run at 3,500 rpm at 40 mph while charging the hybrid battery. One RAV4World owner who wanted to see engine speed uses an OBDLink MX+ plug-in adapter with the Hybrid Assistant app. The OBDLink MX+ was $139.95 on OBDLink's site when I checked on October 15, 2026. And Hybrid Assistant only runs on Android phones.

A blocked hybrid battery vent

So the vent under the right side of the back seat feeds air to the hybrid battery's cooling fan. If the vent is blocked, Toyota says the hybrid battery's output can be limited and fuel economy drops. And a hot hybrid battery is one of the reasons the engine keeps running. So clean the vent when "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" shows on the gauge screen. I show how in my hybrid battery check guide.

When an engine that won't shut off is worth a dealer visit

This list comes from owners and mechanics, not Toyota.

So if you see any of the signs above, I'd ask the dealer to check for codes and the coolant temperature. That works better than naming a part yourself.

What to tell the dealer. Say when the engine keeps running: on cold starts, at every stop, going downhill, or only with the heat on. Give the outside temperature, whether the EV light ever comes on, and any messages on the gauge screen. And take a phone video with sound. Toyota's own tech tips for the rear motor growl ask dealers to record video too.

2026 RAV4 Hybrid and Plug-in Hybrid sounds

So the 2026 RAV4 Hybrid and Plug-in Hybrid manuals list the same normal sounds and the same brake system sounds. The 2026 manual adds that you may hear the pedestrian warning sound inside the car too. And the 2026 has Rear Camera Detection beeps and a Reverse Warning Buzzer that only a dealer can add, which I cover in my RAV4 beeps guide.

And the 2026 owner complaints to the NHTSA so far are about sudden automatic braking and one plug-in hybrid system shutdown, not about normal sounds. My automatic braking guide covers the braking alerts.

Videos that help explain RAV4 Hybrid sounds

Toyota hybrid makes a weird noise.. is it my brakes?, from Steve Clifford of Sheehy Toyota, December 2023, 3 minutes.

A Toyota dealer plays the pedestrian warning sound so you can tell the warning sound from a brake noise.

  • How Steve Clifford shows the sound: Clifford drives a Toyota hybrid slowly next to a wall with the heat and A/C off, so the gas engine shuts off. Then you can hear the hollow, high-pitched sound.
  • When the sound is loudest: The sound is louder in reverse.
  • How to tell the warning sound from the brakes: The sound stops as soon as the gas engine starts. Clifford says people often mistake the sound for rusty or squealing brakes.
Toyota electronic parking brake or what is that noise when I shift into park?, from Steve Clifford of Sheehy Toyota, September 2024, 4 minutes.

The same Toyota dealer explains the whir you hear when you shift into park.

  • What makes the whir: The electronic parking brake's motor squeezes the back brakes every time you shift into or out of P.
  • What Steve Clifford shows: With a RAV4 up on a lift, Clifford points out the motor on the back brake.
  • Whether it's normal: Clifford says the whir is normal. And a technician at the dealer has never seen this kind of parking brake freeze on in Virginia winters, which get down to about 0°F, though Clifford says it's possible.
2019-2025 Toyota RAV4 Hybrid Brake Actuator Failure (91,000 Miles), from HowToAmerica, January 2026, 3 minutes.

This is what a brake sound that isn't normal sounds like on a RAV4 Hybrid.

  • The RAV4 in the video: A 2022 RAV4 Hybrid from Michigan with 91,000 miles.
  • The sound: The brake pedal squeaks with every light tap, with the car on or off.
  • How HowToAmerica found the cause: The squeak stops with the 12-volt battery unplugged, which points to the electronic brake booster unit, not the pedal.
  • The cost: They say the part cost a couple grand from Toyota. The title says $3,000, but the video doesn't back up that number.
RB

Buddy's take

So ultimately, most RAV4 Hybrid sounds are normal, and Toyota lists them right in the manual. The whir at the door, the clank under the back seat, the parking brake whir and the hum hours after you park are all part of how the car works.

And grinding on the first few stops after rain is usually just rust on the brake discs. But keep in mind that a pump that keeps running, grinding that won't clear, or any brake or hybrid warning is worth a dealer visit. So hopefully this helps you tell the normal sounds from the ones worth checking.

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Which RAV4s have a 100-watt or 1,500-watt household outlet, how to turn the outlet on with the car parked, what it can run and for how long, and what Toyota says about running a RAV4 Hybrid all night for heat or A/C.

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RAV4 Prime battery health: is charging to 100% every night bad?

What Toyota's manual says about charging to full, how much electric range owners report losing, what the warranty covers, and how the car drives when the electric range runs out.

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RAV4 Prime and Plug-in Hybrid drive modes: EV, AUTO EV/HV, HV and Charge mode, and which to use when

What each drive mode on a plug-in RAV4 does, which button changes it on the 2021 to 2025 RAV4 Prime and the 2026 RAV4 Plug-in Hybrid, and which mode to use for a commute, a highway drive and a road trip.

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RAV4 Prime maintenance when the engine barely runs

Oil change timing, old gas in the tank, the add-fuel message and real service costs for a plug-in RAV4 that mostly drives on electric.

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Every RAV4 Prime and Plug-in Hybrid recall, and what to do about each one

I go through every recall on a 2021 to 2026 plug-in RAV4, the DC-DC converter recall and its cold-weather charging rule in plain words, what each charging warning message means, and the Toyota bulletins behind code P1CCC96 and other charging problems.

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RAV4 rattles and leaks: what Toyota fixes for free, and what you fix yourself

Water dripping from the headliner, side mirrors that shake on the highway, a rattle by the front seat belt. Here's which of these Toyota fixes, who pays, and how owners track down the rest.

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RAV4 road noise: how loud is it on the highway, and is something wrong with mine?

People say the RAV4 is loud on the highway. Here's how loud the RAV4 actually measures next to its rivals, where the noise comes from, which sounds mean something's wrong, and which fixes work.

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RAV4 rust protection: washing off salt, undercoating and a spring check

What Toyota's rust warranty covers, how to rinse salt off a 2019 to 2026 RAV4's underside, which parts actually rust, when an oil spray makes sense on a gas, Hybrid, Prime or Plug-in Hybrid, and the spring check.

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RAV4 screen frozen or black: how to restart it, check your software version and update it

If the center touchscreen in your RAV4 freezes, goes black or keeps rebooting, here's the 3-second restart, Toyota's fixes by year, and how to update the screen's software yourself.

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How to reset the tire pressure light on a 2019 to 2026 RAV4

There's no reset button on a 2019 or newer RAV4. Here are the exact steps on each screen, when you don't need to reset at all, and how to set up winter wheels and new sensors.

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How to install a trailer hitch and trailer wiring on a RAV4, with no drilling

Step by step for the bolt-on 2-inch hitch and the plug-in trailer light harness on every RAV4 from 2019 to 2026, gas, Hybrid and Prime, plus what you add for a 7-pin plug and a brake controller.

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Sharing a RAV4 between two drivers: both phones, both profiles and the Toyota app

If you and your partner both drive the RAV4, this guide shows how to get both phones working and how to add the second driver's profile. It also covers how two people can share remote start in the Toyota app, for 2019 to 2026.

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RAV4 windshield cracked for no reason: is it a defect, and who pays?

Owners say their RAV4 windshields cracked with nothing hitting them. Here's what the records actually show, who usually pays, which glass to ask for, and why the camera has to be recalibrated after.

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RAV4 winter prep: clear windshields, frozen doors, block heaters and a checklist

The defrost settings that clear a 2019 to 2026 RAV4's windshield fastest, how to open a frozen door, liftgate, fuel door or charge port without breaking anything, which RAV4s can take a block heater, and what to do before the first snow.

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The Toyota app on a RAV4: what's free, what costs money, and what to keep

When you link your RAV4 to the Toyota app, it walks you through a lot of trials and paid plans. Here's what each one does, what it costs when the trial ends, and what you already get free. And I cover how to link every RAV4 year and what to do when the app won't work.

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How to stop the Toyota welcome screen, and whether you need to link your RAV4

The Toyota welcome screen on your RAV4 keeps asking you to link the car to the Toyota app. Here's how to make it go away for good, and what you give up if you never link it.

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How to turn off your RAV4's automatic parking brake (PKSB)

The switch that stops your RAV4 from slamming on the brakes while you park is not the same switch as the parking beeps. Here's exactly which switch does what, where to find the PKSB switch on your RAV4, and how to turn PKSB back on.

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Where this comes from
  • Toyota RAV4 Hybrid owner's manuals, "Sounds and vibrations specific to a hybrid vehicle": 2020 (OM0R025U, page 74), 2022 (OM0R058U, page 74), 2023 to 2025 (OM0R102U, page 72) and 2026 (OM0R160U, page 74). RAV4 Prime (OM42F73U) and 2026 RAV4 Plug-in Hybrid (OM42F96U), pages 81 to 82.
  • Toyota's brake system and ABS operating sounds: 2023 to 2025 RAV4 Hybrid manual page 328, 2020 manual page 370, 2026 Hybrid manual page 414 and 2026 Plug-in Hybrid manual page 476. Same wording in the 2022 Hybrid and RAV4 Prime manuals.
  • 2023 to 2025 RAV4 Hybrid manual (OM0R102U), by topic: electronic parking brake, pages 233 to 234. Radar cruise control, pages 291 to 292. Pedestrian warning speaker, page 72. Regenerative braking, pages 71 to 72. Predictive SOC control, page 73. Brake pad wear indicators and puddles, page 198. Car wash, page 384. Hybrid battery air vent, pages 78 to 79 and 426 to 429. Audible symptoms to take to the dealer, page 455.
  • The fuel evaporation leak check note, "Noise from under vehicle after turning off the hybrid system," at the front of the 2020, 2022, 2023 to 2025 and 2026 RAV4 Hybrid manuals, the RAV4 Prime and 2026 Plug-in Hybrid manuals, and the gas RAV4 manual (OM0R100U).
  • 2026 RAV4 Hybrid manual (OM0R160U), page 73, for driving down a long hill.
  • NHTSA recall 19V544000 (Toyota K1L/K0L), filed July 24, 2019.
  • NHTSA owner complaints for the 2019 to 2026 RAV4, RAV4 Hybrid, Prime and Plug-in Hybrid, searched October 15, 2026, including 11641115 (2019 RAV4 Hybrid brake booster pump) and 11512952 (2021 RAV4 Hybrid brake noise).
  • Toyota bulletins from the NHTSA's list of Toyota communications, read October 15, 2026: T-SB-0009-19 (storage, page 6), T-SB-0038-24 (wheel film), T-TT-0623-20, T-TT-0601-20, T-TT-0636-20, T-SB-0042-22, T-TT-0582-19 and T-TT-0550-19.
  • Toyota's 2025 RAV4 Hybrid Warranty and Maintenance Guide, pages 15 and 25 to 26.
  • RAV4World owner threads: buzzing noise when the door opens (June to July 2024), rust lines on hybrid brakes (December 2024), sharp metal to metal noise when braking (February 2026) and engine running all the time (2019 to 2023).
  • CarAraC, "Toyota Hybrid Brake Pump Pressurizing Noise", February 1, 2026, for the brake pump check.
  • OBDLink MX+ price from OBDLink's site, checked October 15, 2026.

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