2015 BMW M4 (S55B30T0) Tuning Guide
Tuning Summary
The BMW M4 is a performance-oriented vehicle with a strong aftermarket presence, making it highly tunable. Its turbocharged inline-6 engine is well-suited for ECU tuning, and there's a wide availability of performance parts. The car also has a cult following among enthusiasts.
Tunability Score
Max HP Gain
+200-300+ HP
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- Tuning Score
- 8/10
3 published stage paths
Tuning score is 8 out of 10.
- ECU Access
- Moderate
Access limits faster builds
ECU access is Moderate with a score of 4 out of 10.
- Aftermarket Support
- Excellent
Support varies by build target
Aftermarket support is Excellent with a score of 5 out of 10.
- Estimated HP Gain
- +200-300+ HP
Highest published stage gain
Estimated peak stage gain is about +200-300+ HP.
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Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.
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