Brake Booster – Porsche 944 ATE – 94435502311 – Fits BMW E30 (Stock Replacement or Engine Swaps M5x/S5x/S54) – Requires Modification

Brake Booster – Porsche 944 ATE – 94435502311 – Fits BMW E30 (Stock Replacement or Engine Swaps M5x/S5x/S54) – Requires Modification

Product Details
Upgrade or replace your BMW E30’s brake booster with the Porsche 944 ATE unit, part number 94435502311. This booster is a proven solution for both stock replacement and engine swaps where clearance around the intake manifold is limited.

For swaps, it is especially popular with M50, M52, M54, S50, S52, and S54 engines, as it provides the additional space needed while retaining an OEM-like pedal feel. When paired with larger master cylinders such as the BMW E32 unit, this booster supports enhanced brake performance for big brake upgrades.

⚠️ Fitment Note: This is not a direct bolt-on part. The Porsche 944 ATE brake booster requires modification to fit the BMW E30 chassis. For S54 swaps, additional trimming of the intake manifold may be required. DIY and swap guides are widely available online.

Replaces OE Part Number
94435502311

Why Choose This Part?

Replacement or Swap Upgrade – Works as a replacement for E30 boosters or in swap builds.

Clearance Gains – Provides needed space near the intake manifold for larger engines.

OEM-Like Pedal Feel – Similar braking feel to stock.

Supports Big Brake Upgrades – Works with larger master cylinders like the E32.

Available New – Easier to source than original E30 boosters.

Fits the Following Applications
BMW E30 – All 1984–1991 models (modification required)

Compatible with the following swap engines:

BMW M50

BMW M52

BMW M54

BMW S50

BMW S52

BMW S54 (may require additional manifold trimming)