RaceChip GTS Tuning Box - 3 Series (E46) / 1998-2005

Unlock serious everyday performance for your BMW 3 Series E46

Looking for a fast, safe and reversible power upgrade for your 1998 to 2005 BMW 3 Series E46 without flashing the ECU? This German-engineered plug-in performance module delivers a noticeably stronger mid-range, sharper throttle response and up to 30 percent gains in power and torque, transforming the way your car pulls in real-world driving. It is the non Bluetooth version with an onboard digital interface for quick adjustments.

We have fitted and run these units on customer cars and our own vehicles with fantastic feedback. Drivers love the easy installation, the smooth delivery and the confidence of built-in protection features and an included 2-year engine warranty.

Why enthusiasts choose this piggyback ECU upgrade

• Up to 30 percent more bhp and torque for quicker overtakes and stronger acceleration
• Reversible plug-and-play installation - an ideal Stage 1 alternative with no ECU remap required
• Seven selectable calibration profiles for a custom feel that suits your engine and fuel quality
• Digital User Interface for simple, precise on-unit adjustments
• Engine Protect System + helps safeguard critical parameters for peace of mind
• 2-year engine warranty included for added confidence

Engine-specific optimisation

Every unit is supplied with motor-specific software and carefully developed mapping so your E46 - petrol or diesel variant - benefits from tailored calibration that accounts for mileage, tolerances and regional fuel. Fine-tune the character of your car by selecting from the seven maps to match your driving style, from daily comfort to spirited B-road use.

Robust hardware you can trust

• ARM Cortex-M3 processor for rapid signal processing
• Up to seven analogue and digital channels for precise control
• Electronics with Nano-Protect coating for durability
• Automotive-grade FCI connectors for a secure fit
• Ultra-resistant composite housing with pro fixing system
• Compact size - 112 x 111 x 36 mm for a discreet install

Perfect for BMW 3 Series E46 1998 to 2005

Designed specifically for the E46 platform, this performance module enhances everyday drivability with a stronger torque curve and improved in-gear urgency. It is ideal if you want a quick power boost that can be removed at any time, leaving no trace on the factory ECU.

Installation and support

Plug-in fitment with model-specific wiring makes installation straightforward. Prefer a professional install and setup

Book fitting with MJ Modifications in Warwickshire - email info@mjmodifications.co.uk for a quote and availability.

Good to know

• Non Bluetooth version - adjustments made via the on-unit digital controller
• Always run quality fuel and keep the vehicle well maintained for best results
• Easily removable for servicing or when returning the car to standard

If you want a noticeable step-up in performance, effortless everyday torque and a premium, German-built module with engine protection and warranty cover, this is the smart upgrade for your E46.