Replacement Brake Servo Vacuum Sensor for the E90, E92 and E93 M3. As these cars age, it’s becoming a very common issue to have a ‘0027E4 – Brake Booster Vacuum Pump Plausibility’ error, causing the vehicle to go into limp mode sporadically. This is due to a faulty brake servo vacuum sensor.

From BMW, it is only possible to buy the complete Vacuum line with the sensor pre-fitted (part no 34302283608), at the time of writing priced at £183.91 (inc VAT) but unavailable. After extensive research, we have been able to identify the correct sensor individually.

This sensor is a Genuine BMW part, and is the exact sensor that is fitted to the complete assembly. By buying it alone, you not only save a considerable amount of money, but it also means that fitting is far easier as this sensor can be replaced in-situ.

Fits all E9X M3 models.