BMW M3 M3 343bhp tuning file
E46 (1998–2005) · Petrol · ECU: Siemens/Continental MSS52 / Siemens/Continental MSS54
Stage 1 remap: +22 bhp & +25 Nm
ECU
Read methods
Available solutions
Our Stage 1 tuning file takes the BMW M3 M3 343bhp from 343 bhp and 365 Nm to 365 bhp and 390 Nm – that's +22 bhp (6%) and +25 Nm more. The remap file is written by a calibrator for your exact software on the Siemens/Continental MSS52 / Siemens/Continental MSS54 and returned through the portal, normally within 5–15 minutes. Solutions such as DECAT, DTC Removal, FLAPS, Pop & Bang Crackle map can go into the same file.
Who is this remap for?
On a turbo petrol, a remap sharpens throttle response and pulls harder through the mid-range. For the best result we recommend running it on super unleaded (97–99 RON). 343 → 365 bhp equals roughly 256 → 272 kW.
Figures are guide values from our rolling road and comparable vehicles. Results depend on the vehicle's condition, hardware and fuel quality. Remapping in the UK: let your insurer know about the modification. DPF, EGR and AdBlue solutions are supplied for off-road and motorsport use only and are not legal for use on UK roads.
Engine specification
| Fuel type | Petrol |
| Engine size | 3246 CC |
| Compression ratio | 11.5 : 1 |
| Bore × stroke | 87.0 X 91.0 mm |
| Engine code | 326S4 |
Other BMW M3 E46 (1998–2005) engines
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