Brake Pressure Sensor – Audi A2 A3 A6 TT – 1J0907597B

Get your Audi back to correct ABS, ESP and electronic stability control function with this replacement brake pressure sensor, also referenced in service manuals as the ESP pressure sensor or master cylinder pressure sensor. Built to OEM specification, matching 55CP15-01, 55CP14-02, 1.J0.907.597.B, 10.0522-9960 and 1J0907597. Also fits equivalent Seat, Skoda and Volkswagen models.

Common signs of failure

A failing brake pressure sensor typically triggers ABS, ESP and traction control warning lights together, with fault codes around the brake pressure circuit (manufacturer-specific). Drivers report the hill-hold function failing, electronic parking brake errors on some models, and the stability/traction systems disabled. Braking itself still works mechanically, but the active safety systems that depend on knowing pressure-on-the-pedal are offline.

Fitment notes

Direct-fit replacement, threaded into the ABS hydraulic module or master cylinder. The brake system will need bleeding after fitting to remove any air introduced during the swap — use the correct DOT-rated fluid. Clear codes with a scanner after installation. Standard 3 pin connector.

Frequently asked questions

Will I lose my brakes if this sensor fails?

No — mechanical braking is unaffected. The fault disables electronic assistance (ABS, ESP, hill-hold) but you can still stop the car using the brake pedal normally.

Do I need to bleed the brakes after fitting?

Yes — any time a brake hydraulic component is removed, bleed the system to remove trapped air. Most modern ABS systems also benefit from a scanner-driven bleed sequence.

Will the warning lights clear automatically?

After fitting and bleeding, clear codes with an OBD2 scanner. On most vehicles a short drive above 12 mph will then reset the ABS/ESP modules.