BMW 3 Series (E46) 2001-2006 M3 338bhp remap figures
The BMW 3 Series M3 338bhp (2001-2006) is a petrol 3.2L model making 338bhp and 365Nm as standard. After a Stage 1 ECU remap we expect 368bhp and 397Nm - up to 30bhp and 32Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 338 bhp | 368 bhp | +30 bhp |
| Torque | 365 Nm | 397 Nm | +32 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 338 bhp | 365 Nm | |
| Stage 1Maximum software-only performance | 368 bhp | 397 Nm | +30 bhp +32 Nm |
| Stage 1 EcoPerformance with economy in mind | 361 bhp | 394 Nm | +23 bhp +29 Nm |
| Eco mapEconomy first | 358 bhp | 393 Nm | +20 bhp +28 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your 3 Series
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
This car is listed with a Siemens MSS54 engine control unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the BMW 3 Series M3 338bhp?
We expect 368bhp and 397Nm against 338bhp and 365Nm as standard: up to +30bhp and +32Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the BMW 3 Series M3 338bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 361bhp and 394Nm expected. The Eco map is economy first: 358bhp and 393Nm. Both still sit above the standard 338bhp and 365Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More BMW 3 Series figures
Other petrol variants
- M3 CSL 360bhp 1998-2005
- 330i 231bhp 1998-2005
- 328i 193bhp 1998-2005
- 325i 192bhp 1998-2005
- 323i 170bhp 1998-2005
All petrol 3 Series (E46) variants · 3 Series (E46) 1998-2005 overview · All BMW figures