BMW 6 Series 635D 306hp Remap

The BMW 6 serie 635D 306hp is a 3.0L turbocharged diesel engine producing 306 BHP and 600 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 340 BHP and 680 Nm — a gain of around 34 BHP (11%) and 80 Nm (13%).

This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.

From a technical perspective, the ECU is typically a Bosch EDC16 (likely), and the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..

Considerations: High tuned torque: check transmission torque capacity and service history.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.

Fuel economy note: possible improvement with conservative driving.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.