Considering an ECU remap for your BMW 6 Series 635D 306hp? A Stage 1 remap can take this E63 - 2004 - 2010 diesel engine from 306 BHP to 340 BHP and from 600 Nm to 680 Nm of torque (turbocharged). This engine scores 6/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 6 Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
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.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 630i 258hp | 258 → 284 | +26 | 300 → 330 | +30 | Moderate (4.5/10) |
| 630i 272hp | 272 → 285 | +13 | 300 → 330 | +30 | Moderate (4/10) |
| 635D 286hp | 286 → 332 | +46 | 580 → 685 | +105 | Good (6.5/10) |
| 645ci 333hp | 333 → 355 | +22 | 450 → 480 | +30 | Limited (3.5/10) |
| 650ci 367hp | 367 → 390 | +23 | 490 → 525 | +35 | Limited (3.5/10) |
| M6 5.0 V10 - 507hp | 507 → 530 | +23 | 537 → 560 | +23 | Limited (3/10) |
Get a personalised remap quote for your BMW 6 Series. We'll connect you with a trusted professional in your area.
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 before proceeding.
