RaceChip GTS + App Bluetooth Tuning Box for BMW 3 Series E46 (1998-2005) - Plug & Play Piggyback ECU Remap Alternative, Stage 1 Chip Tuning - Fits 320i 325i 330i 320d 330d | Performance Module with App Control Power Upgrade Petrol & Diesel

Plug-in power upgrade for BMW 3 Series E46 1998 to 2005

Discover a fast, reversible way to add serious shove to your BMW E46 with a Bluetooth-controlled piggyback ECU module. This premium, plug-and-play performance unit delivers a noticeable jump in bhp and torque while retaining factory drivability and safety. Expect up to 30 percent more power and torque, crisper throttle response and stronger mid-range pull for confident overtakes and effortless daily driving.

Why enthusiasts choose this Bluetooth performance module

• Up to 30 percent increase in power and torque compared to stock
• Smartphone control via Bluetooth for on-the-fly adjustment
• Seven fine-tuning stages to tailor response to your specific engine
• Engine-specific calibration for BMW E46 petrol and diesel variants
• Built-in Engine Protect System Plus for additional safety margins
• Two-year engine warranty included for extra peace of mind
• Quick, reversible install with OE-style high-quality connectors

Engineered for reliable gains

This advanced piggyback uses motor-specific software and carefully developed maps to enhance performance without compromising the vehicle’s safeguards. Fine-tuning files allow you to match the module precisely to the condition of your engine, mileage and the fuel you use, helping you extract the best, most consistent results from your E46.

Digital control and customisation

Dial in your preferred driving feel with seven selectable mapping levels, managed through an intuitive digital user interface and Bluetooth app control. Whether you want a smooth daily setup or a sharper weekend setting, you can change it in seconds.

Automotive-grade hardware

• ARM Cortex-M3 processor for rapid, precise signal processing
• Up to seven analogue and digital channels for accurate sensor integration
• Nano-Protect coated electronics for durability
• Pro-grade FCI connectors for secure, factory-like fitment
• Ultra-resistant composite housing with a robust fixing system
• Dimensions: 112 mm L x 111 mm W x 36 mm H

Fitting and support

Installation is straightforward and fully reversible, making this a great remap alternative for lease, finance or collector cars. For professional fitting, we recommend MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Tried, tested and loved

We run these units on our own builds and customer cars, and feedback has been consistently positive: stronger acceleration, smoother delivery and impressive drivability, all while keeping factory safety strategies intact.

Search-friendly fitment and benefits

BMW 3 Series E46 performance upgrade, plug-in ECU module, chip tuning for 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005 models. Ideal remap alternative, torque booster, Stage 1 style power increase, Bluetooth tuning for BMW 320, 325, 330 and more E46 variants. Enhance acceleration, overtaking performance and mid-range punch with a simple, reversible hardware solution.

Note: Gains are engine and condition dependent. This listing refers to the Bluetooth app control version of the GTS series module.