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TRW/Lucas-Girling Brake Master Cylinder | 34331156978

BMW 535i, 525i, M5, 735i, 735iL
$139.99
Reg
$145.82
List
$615.08
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
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Make Sure It Fits

P/N: 34331156978 TRW/Lucas-Girling OEM FREE SHIPPING
Description:
For models with TRW/Lucas-Girling brake system only - please verify manufacturer prior to ordering. This unit will not replace ATE master cylinder if so equipped. 1 per car.
Cross References:
  • 34311161617
  • 34311161861
  • 53706032381
  • PML119
  • W01331603453

The master cylinder is a hydraulic cylinder that uses hydraulic pressure to transfer force to operate another hydraulic cylinder. In automobiles, master cylinders operate both braking and clutches for manual transmissions. Master cylinders are located in the engine compartment and are mounted to the vehicle firewall or on a vacuum booster on vehicles with power-assisted brakes. The master cylinder operates using a pushrod that connects the master cylinder to a pedal in the passenger compartment through the vehicle firewall.

Master cylinders fail when the seals in the cylinder leak, preventing the master cylinder from building pressure and replacing the hydraulic fluid with air.

Signs of Faulty Master Cylinders
  • A soft squishy control pedal
  • A control pedal that goes straight to the floor of the vehicle
  • A pedal that you must pump to operate the hydraulic system
  • Clear or brown fluid dripping from the master cylinder

When replacing a master cylinder in your BMW, you must bleed the whole hydraulic system to be free of air. This is because the air in a hydraulic system is compressible, unlike the hydraulic fluid, making the hydraulic system unresponsive.

View more BMW Master Cylinders.

Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Alternate Brands

We found 1 similar part(s) made by other manufacturers.

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What This TRW/Lucas-Girling Brake Master Cylinder Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

BMW
89-91 - 525i
89-93 - 535i
88-88 - 535i
Manufacturer Body Code: E28; Transmission Control Type: Manual
89-92 - 735i
88-88 - 735i
For models with production date from 3/1988.
89-92 - 735iL
88-88 - 735iL
For models with production date from 3/1988.
91-93 - M5