Clicking from left front when stopping

dhartig · 03-27-2008, 03:16 PM

I've had my 08 Prius for a week and notice that when braking and coming to a full stop that I'll sometimes hear 3 clicks and feel the click through the brake pedal as the car goes from walking speed to full stop. This happens about half the time, not sure if it's when the gas motor is on or under regen braking. I'm also wondering if it's not caused by modulating the brake pedal to achieve a smooth stop. Is this a normal characteristic of the system?

qbee42 · 03-27-2008, 10:38 PM

Are you sure it's not the brake accumulator pump? The Prius brakes are electrically assisted, since the engine does not always run. The brake accumulator pump runs to build up pressure for the brakes. It usually runs about every third time you press the brake pedal, but it varies a bit. The sound comes from somewhere down in the driver's foot well area.

Tom

V8Cobrakid · 03-27-2008, 10:48 PM

there are several other really good threads on this. i have the same issue. i've had it for a long time. 90k now.

If you slowly brake and keep the pressure the same.. it doesn't really seem to happen.. but if you're in control and feeling the braking effect, you get it a lot... as you stated.

Some say to take it in and have it fixed. some say to check the brake fluid level. *shrug* mine works fine.

03-27-2008, 03:16 PM	#1
dhartig Junior Member Join Date: Mar 2008 Location: Fort Mitchell, KY Posts: 1 My Car: 2008 Prius Model: Package: #6 Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Clicking from left front when stopping I've had my 08 Prius for a week and notice that when braking and coming to a full stop that I'll sometimes hear 3 clicks and feel the click through the brake pedal as the car goes from walking speed to full stop. This happens about half the time, not sure if it's when the gas motor is on or under regen braking. I'm also wondering if it's not caused by modulating the brake pedal to achieve a smooth stop. Is this a normal characteristic of the system?

03-27-2008, 10:38 PM	#2
qbee42 Senior Member Join Date: Mar 2006 Location: Northern Michigan Posts: 10,474 My Car: 2006 Prius Model: Package: #7 Thanks: 94 Thanked 387 Times in 289 Posts Friends: 10	Re: Clicking from left front when stopping Are you sure it's not the brake accumulator pump? The Prius brakes are electrically assisted, since the engine does not always run. The brake accumulator pump runs to build up pressure for the brakes. It usually runs about every third time you press the brake pedal, but it varies a bit. The sound comes from somewhere down in the driver's foot well area. Tom

03-27-2008, 10:48 PM	#3
V8Cobrakid Senior Member Join Date: Jun 2004 Location: hell Posts: 2,894 My Car: 2004 Prius Model: N/A Package: #9 Thanks: 9 Thanked 18 Times in 18 Posts Friends: 5	Re: Clicking from left front when stopping there are several other really good threads on this. i have the same issue. i've had it for a long time. 90k now. If you slowly brake and keep the pressure the same.. it doesn't really seem to happen.. but if you're in control and feeling the braking effect, you get it a lot... as you stated. Some say to take it in and have it fixed. some say to check the brake fluid level. shrug mine works fine.