MMX BMW G80/G81 M3 & G82/G83 M4 S58 Engine Power Control Module

Unlock the full potential of your BMW G80/G81 M3 or G82/G83 M4 with the MMX Power Control Module (PCM) – a plug-and-play performance upgrade that delivers huge gains in power and torque while remaining removable and undetectable.

Developed as a smarter alternative to ECU tuning, the PCM works in parallel with the factory ECU, using MMX’s in-house developed calibration on a standalone PCB. By safely optimising multiple sensor signals – including charge air pressure, fuelling, and ignition – the PCM delivers seamless, reliable gains across the entire powerband.

After 12 months of development and tens of thousands of dyno, road, and track miles, the PCM has been fine-tuned to achieve the perfect balance of performance, drivability, and engine safety. Unlike basic tuning boxes, it acts much closer to a secondary ECU, offering precision control and OE-level integration.

Each unit is housed in a billet aluminium case, anodised in MMX’s signature gloss black for durability, with finned cooling for reliability under load. A carbon fibre mounting bracket and vehicle-specific loom ensure a perfect fit and simple installation.

Key Features:

• Plug-and-play Power Control Module for G8X S58 engines

• Gains of up to:

  • Standard M3: 550 hp & 650 Nm

  • Competition, LCI & CS/CSL models: 650 hp & 750 Nm

• Acts as a secondary ECU, not a simple tuning box

• Optimises multiple channels in real time (ignition, fuelling, boost)

• Removable and undetectable – warranty friendly

• Developed with extensive dyno, road & track testing

• CNC-machined billet aluminium housing, anodised gloss black

• Carbon fibre mounting bracket for secure installation

• Includes vehicle-specific wiring loom for OE-quality fit

• Engineered and hand-assembled in the UK

• Calibrated in-house by MMX for performance and reliability

Compatibility:

• BMW G80 M3 Saloon (2021+)

• BMW G81 M3 Touring (2023+)

• BMW G82 M4 Coupe (2021+)

• BMW G83 M4 Convertible (2021+)

Unlock a new level of performance with the MMX PCM for BMW G80/G81 M3 & G82/G83 M4 – the smart, safe, and powerful plug-and-play solution for your S58 engine.