Tuning potential
M140i potential depends on B58 software, fuel, cooling, gearbox and supporting hardware.
Relevant engines: B58 3.0 turbo petrol
The F20 and F21 BMW M140i uses the B58 3.0 litre turbocharged straight-six with rear-wheel drive and manual or automatic transmission options. S7 Remaps provides mobile ECU tuning across Preston and Lancashire, with the vehicle checked before programming and the calibration matched to its exact specification. Your registration can be used to confirm the engine and ECU before quoting a figure.
Engine codes and ECU
B58B30M0, B58B30O0. The exact ECU and software version should be confirmed before programming.
Turbo and supporting hardware
The B58 uses a single twin-scroll turbocharger; intake, intercooler and charge-air temperature matter at higher stages.
Gearbox and clutch considerations
ZF 8HP and manual cars need different torque strategies. A TCU calibration may be considered separately where appropriate. Manual cars can expose clutch wear when additional torque is used frequently.
Drivetrain
F20 and F21 cars are rear-wheel drive, so tyres and traction are important.
Stage 1 information
Stage 1 can suit healthy standard hardware. Around 420 bhp and 600 Nm is an indicative wider-market target, not a guaranteed S7 result.
Stage 2 information
Stage 2 depends on target, fuel, cooling and hardware such as intake, intercooler or downpipe changes.
Economy considerations
Extra performance generally increases fuel use when used.
Suitability and condition
Check cooling, plugs, coils, oil leaks, gearbox and tyres before tuning.
- Confirm B58 ECU version
- Check manual clutch or ZF service history
- Use suitable fuel for the calibration
Frequently Asked Questions
We can check many BMW M140i variants. Send the registration so we can confirm the exact engine, ECU and suitable options.
REAL S7 REMAPS RESULTS
Results from genuine customer vehicles
Genuine S7 customer results will be added here as dyno sheets, vehicle details and customer-approved photos become available. We do not publish made-up figures.