2006 Toyota Prius — Known Issues & Recalls

Your brakes completely failed while your daughter was driving through a 4-way stop, leaving her unable to stop the car—fortunately, your father was able to guide her to safety. There was a recall issued in 2016 for the Brake Actuator Assembly (the part that controls your brakes), but Toyota says the recall has expired. The brake system should be inspected and the failed brake actuator assembly likely needs to be replaced to restore safe braking.

Your Prius's brake actuator has failed, making the car unsafe to drive. You'll see warning lights and hear a loud beep when you start the vehicle. The manufacturer has refused to repair or recall this issue. The brake actuator will need to be replaced to restore safe braking function.

Your brake actuator isn't working properly, which could eventually cause an accident. Toyota issued a recall for this issue, but you were never notified and the company says you're now outside the recall window and won't help. You're asking for documentation of the original recall notice, which Toyota cannot provide.

Your power brakes may fail or become less responsive, requiring you to press much harder on the brake pedal to stop the car. You may also experience unexpected braking when reversing, and notice the ABS and brake warning lights illuminated along with a ringing sound in the cabin.

When you brake while going over a bump, your Prius lurches forward and the traction control light comes on. During this lurch, your brakes temporarily fail for 1-2 seconds before re-engaging and allowing you to stop. Your dealer mentioned there's an ECM reprogramming fix available, though they're uncertain if it applies to your 2006 model since it was officially released for 2008-2009 models.

Your 2006 Prius with 170,000 miles is making noise from the ABS brake actuator whenever you turn off the engine. This is likely a sign that the ABS system needs attention. The fix will probably involve inspecting or replacing the ABS actuator unit.

You were hit on your driver's side door by another vehicle traveling at 35 MPH while you were turning left at less than 3 MPH in an intersection. Despite the serious impact, your airbags did not deploy, and you sustained injuries including a broken rib, rotator cuff damage, whiplash, and back injuries that required medical attention. The airbag system may have failed to sense the crash impact or trigger deployment when it should have.

Your Prius's brake system may fail suddenly when the 12-volt battery ages or weakens, especially in cold weather or if the electrical system is heavily used. You'll hear an alarm and see ABS and VCS warning lights before the front brakes stop working, followed by rear brakes locking up. Installing a new 12-volt battery usually resolves the issue, but there's no dashboard warning to alert you when the battery is too weak for safe braking. The fix likely involves updating the brake control unit's electrical design to handle normal battery aging better, and adding a battery condition warning to your dashboard.

Your steering wheel suddenly steered itself to the left while you were driving at 35 mph, and then jerked back and forth between left and right despite your efforts to control it. The vehicle crashed into a curb and then accelerated across two lanes into oncoming traffic, where another vehicle hit you head-on. The airbags deployed, and you sustained serious injuries requiring hospitalization.

Your Prius unexpectedly accelerated and moved forward while parked in your garage with the emergency brake engaged, causing it to crash into your home. The vehicle was off but started on its own after being pulled from the house. Your legs were trapped between the door, and the airbags did not deploy. This issue may involve the brake system, transmission, or electronic control modules that need diagnostic testing and repair.

Your car's ABS actuator has failed, which means your anti-lock braking system isn't working and your regenerative braking (which recharges the battery) isn't functioning. This is a serious safety issue because it affects your ability to stop the vehicle properly. You'll need to have the ABS actuator replaced by a mechanic.

Your Prius is making a loud buzzing sound from the brakes, and your brake warning light, ABS light, and stability control light are all on at the same time. Your brakes may not be working properly. This has been diagnosed as an accumulator failure in the brake system, and even after replacement, the problem keeps coming back.

Your headlights randomly turn off while driving at night, then turn back on without any pattern or warning — this creates a serious safety hazard. The problem affects either the right or left headlight unpredictably. This appears to be a recurring issue across multiple vehicles. The fix will likely involve diagnosing the headlight wiring, connector, or the headlight relay/switch for a potential short circuit or loose connection.

Your dashboard lights, including the gas gauge, speedometer, and transmission indicator, stopped working when you started your car. Additionally, your car wouldn't turn off, forcing you to complete your errands with the engine running. This appears to be a known issue affecting multiple Prius owners, potentially caused by a failed diode on the instrument cluster circuit board, which may require replacement of the entire dashboard display unit.

Your car's ABS sensor (part of the brake system) failed while you were driving on the highway. The ABS system helps prevent wheel lockup during hard braking, so this failure could have made it harder to stop safely. This sensor should typically last much longer than it did. Fixing this will likely involve replacing the faulty ABS sensor.

Both of your headlights went out while driving at night, nearly causing a crash. After turning the car off and back on, they came back on, but the driver's side headlight keeps going out intermittently. You also notice the speedometer reads 4-5 mph higher than your actual speed. The dealership quoted over $2,400 to replace both headlight bulbs and wiring, with no guarantee the fix will work. This issue is costing you money since you work night shifts and can't reliably drive your car.

Your car's engine won't turn off when you try to shut it down, even though no warning lights appear on the dashboard. You may need to disconnect the battery to stop the engine. This could indicate a problem with the ignition system or engine control module that needs diagnosis and repair.

Your Prius headlights aren't working properly, and a warning light has been on since shortly after you bought the car. Even though Toyota and a technician have replaced the headlights and relay fuses, the problem persists. This is a safety concern because faulty headlights increase accident risk at night and can result in traffic citations and failed vehicle inspections. The fix may require diagnosis of the electrical circuit or replacement of additional components like the headlight control module or wiring harness.

Your instrument cluster display (odometer, fuel gauge, and speedometer) doesn't light up consistently, and when it's dark, your cruise control and warning lights also stop working. This happens intermittently rather than all the time. The issue is caused by defective capacitors on the display circuit board. Fixing this will likely require replacing the capacitors on the instrument cluster circuit board or replacing the entire cluster.

Your dashboard lights and instrument panel randomly fail to turn on when you start your vehicle, even though the car runs normally. This makes it difficult to see your speed, fuel level, and warning lights while driving. The fix will likely involve diagnosing the electrical connection to your dashboard or replacing a faulty dashboard circuit board.