Considering an ECU remap for your BMW M3 M3 343hp? A Stage 1 remap can take this E46 - 1998 - 2005 petrol engine from 343 BHP to 365 BHP and from 365 Nm to 390 Nm of torque (naturally aspirated). This engine scores 4/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW M3 can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW M3 M3 343hp is a 3.2L naturally aspirated petrol engine producing 343 BHP and 365 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 365 BHP and 390 Nm — a gain of around 22 BHP (6%) and 25 Nm (7%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.
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 |
|---|
| M3 CSL 360hp | 360 → 380 | +20 | 370 → 390 | +20 | Moderate (4/10) |
Get a personalised remap quote for your BMW M3. 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.
