BMW Power Brake Booster - Genuine BMW 34337850999

Product Information

BMW Brake Boosters diagram for M3, M4, M2

Your vehicles brake booster is designed to provide power assistance to the braking system. On most cars, the brake booster uses engine vacuum to do this. However, many modern cars use an auxiliary vacuum pump to provide vacuum to the brake booster.

The brake booster is in line between the brake pedal and brake master cylinder. It essentially amplified the force applied to the pedal by your foot and outputs more braking force in the hydraulic braking system. This makes braking your vehicle a much less physical task.

When a brake booster is failing you may notice that braking effort increases. the engine runs poorly or stalls with force on the brake pedal, or the relative resting position of the brake pedal has changed. In these cases it is recommended to inspect the hoses leading to the brake booster as well as the brake booster itself. If the brake booster is in fact faulty it is highly recommended to replace it as soon as possible.

• Hard pedal with no braking power
• Longer stopping distance
• Engine stalls with brakes applied
• Brake pedal position higher than normal

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.