Help keep pedal effort light and braking assist steady with this TRW brake booster, part number PSA122. It multiplies the force from your foot at the pedal so the brakes apply with less effort. It is a direct-fit replacement for many BMW models, among them the 2006-2008 BMW 750i, 2006-2008 BMW 750Li and 2003-2008 BMW 760Li. See the Buyer's Guide tab for the full list and engine details.
A brake pedal that feels hard or stiff, or that needs noticeably more effort to slow the car, is a sign the booster may need replacing. Other brake-system faults can cause similar symptoms, so diagnose the cause before replacing the booster. If a failed booster is the problem on your BMW, PSA122 replaces it with a TRW unit made for the listed applications.
What does a power brake booster do?
It multiplies the force you apply at the brake pedal before that force reaches the master cylinder, so the brakes apply with less pedal effort.
Which vehicles does TRW PSA122 fit?
It fits many BMW models, among them the 2006-2008 BMW 750i, 2006-2008 BMW 750Li and 2003-2008 BMW 760Li. See the Buyer's Guide tab for the full list.
What are signs a brake booster may need replacing?
A hard or stiff brake pedal, or one that needs noticeably more effort to stop the car, can indicate a booster problem. Other brake faults cause similar signs, so diagnose the cause before replacing.
What makes the TRW design different?
TRW uses a unique tie rod design that allows lighter, thinner parts for more efficient performance. As an OE manufacturer of brake boosters, TRW builds it for OE-quality fit and function.
Is PSA122 a direct-fit replacement?
Yes. It is a direct-fit replacement for the listed BMW applications, built by TRW for OE-quality fit and function. See the Buyer's Guide tab for engine details.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
