BMW 4.0i Tuning
Supported in 2 BMW models, 1995+.
BMW
2 supported 4.0i applications
Models With the BMW 4.0i
All Supported BMW 4.0i Tunes
| Model | Years | Version | Stock power | Controller | Platform |
|---|---|---|---|---|---|
| M5 | 1995+ | E39 | 400 hp | ECU Siemens MSS52 | AutoTuner |
| Z8 | 1999+ | E52 | 400 hp | ECU Siemens MSS52 | AutoTuner |
About BMW 4.0i tuning
We tune the BMW 4.0i in 2 applications across the M5, Z8, from 1995+, in gasoline form, with stock outputs of 400 hp. Calibrations are written on AutoTuner for your exact hardware and fuel, then proven on our Dynojet 424xLC2 in Jenison, MI.
This engine runs on: Siemens MSS52.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.