RaceChip RS + App for BMW 8 Series G15 (2018+) – Plug & Play Tuning Box/Piggyback ECU, Bluetooth App Control Chip Tuning Power Module, Remap Alternative – Fits 840i, 840d, M850i

App-controlled performance module for BMW 8 Series G15 2018 onwards

Unlock responsive, real-world performance with the RaceChip RS with app control for the BMW 8 Series G15. This plug-in ECU upgrade is a superb remap alternative that delivers a refined power boost and sharper drivability without permanent changes. It is a quick, reversible, plug-and-play power module that keeps things simple and effective.

Engineered and manufactured in Germany, the RS power box uses vehicle-specific calibration to optimise your engine’s performance. Control it from your phone via Bluetooth and tailor the drive to your needs with six selectable stages. Our customers love the smooth, noticeable gains and we run this kit on customer cars with excellent results.

Why choose this BMW G15 performance module

• Designed for BMW 8 Series G15 2018 onwards for a precise, vehicle-specific fit
• Six adjustable stages via the onboard dial and app for on-demand tuning
• Plug-and-play install in around 10 minutes with step-by-step instructions
• OE-grade locking connectors and premium electronics for reliability
• German-made hardware and software for consistent, repeatable results
• Potential fuel saving of up to 15 percent with a sensible driving style

App control and adjustability

Fine-tune your setup from your smartphone. Switch between the six stages to suit your journey, from relaxed commuting to spirited country roads. The on-unit dial also lets you make quick adjustments without the app if you prefer.

Fast, simple installation

This BMW 8 Series G15 power module uses a dedicated wiring loom with secure automotive connectors. No cutting, no coding. Fitment typically takes about 10 minutes and includes clear installation instructions.

Trusted by enthusiasts

We supply and fit these units regularly. Feedback from our customers highlights improved pull, effortless overtakes and a more engaging drive, all while keeping the convenience of a reversible, plug-in solution.

Professional fitting available

Prefer expert installation or a health check before fitting? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

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