RaceChip S Plug & Play ECU Tuning Box for BMW 3 Series E46 (1998-2005) - Performance Chip/Piggyback ECU Power Module, Remap Alternative - Fits 316 318 320 323 325 328 330 Petrol & Diesel - Boosts BHP, Torque & Throttle Response - Saloon/Touring/Coupe

Plug-in Power Upgrade for BMW 3 Series E46 1998 to 2005

Unlock stronger acceleration, smoother mid‑range pull and improved efficiency with this smart plug‑in performance module for the BMW 3 Series E46. It is a fast, reversible upgrade that delivers up to 20 percent more power and torque with the potential for up to 10 percent better fuel economy, all while retaining factory safety parameters. No coding, no permanent changes, just a tidy install and instant results.

Why enthusiasts choose this unit for the E46

• Step-up in bhp and Nm for effortless overtakes and a livelier drive
• Economy gains of up to 10 percent thanks to improved efficiency in the key rev range
• Five-stage map selector via a simple dial for easy, incremental calibration
• Vehicle-specific calibration for the E46 platform for clean, consistent performance
• Automotive-grade hardware made in Germany for reliability and longevity
• Professional safety connector for a secure, factory-style connection
• Quick DIY fit in around 10 minutes with clear instructions, fully removable

We have fitted and run this upgrade on our own cars and customer vehicles with excellent feedback on responsiveness, drivability and value. It is an ideal remap alternative for drivers who want a plug‑in tuning module that is simple to install yet delivers noticeable gains.

Key software features

• Engine-specific software: v2.0_S
• Five fine-tuning mappings selectable on the unit
• Engine Protect System designed to work with factory safeguards

Key hardware details

• ARM Cortex‑M3 processor
• Up to three analogue and digital channels
• Chip electronics with nano-protect coating
• FCI automotive safety connector
• Ultra-resistant plastic housing
• Basic fastening system included
• Dimensions in mm: L 87 x D 95 x H 36

What you receive

• RaceChip S control module
• Vehicle-specific wiring loom
• Four cable ties
• Installation guide

Fitting and support

Want it installed professionally on your BMW E46 saloon, touring, coupé or convertible from 1998 to 2005? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Search-friendly fitment terms

BMW 3 Series E46 tuning module, plug and play power box, piggyback ECU, performance chip for 3 Series 1998 1999 2000 2001 2002 2003 2004 2005, horsepower and torque upgrade, throttle response improvement, torque booster, BMW E46 performance upgrade, remap alternative, ECU tuning box for petrol and diesel E46 models, quick install chip tuning for 316 318 320 323 325 328 330 where applicable.