ECU remapping involves reprogramming the software in your car's Engine Control Unit to optimize performance. Manufacturers often program cars conservatively to account for poor fuel or different climates. We fine-tune those settings for UK conditions and your needs, resulting in higher horsepower, more torque, and often better fuel efficiency.

Yes – when done by professionals like Mercia Remaps, remapping is completely safe. We operate well within the tolerance limits of your engine and drivetrain. Before tuning, we perform a full health check and diagnostics to ensure your vehicle is in good condition. We never push things to the edge and always keep vital components in their safe ranges.

A typical ECU remap takes 1-2 hours to complete. This includes the initial diagnostic check, reading your current ECU file, creating the custom map, uploading it to your vehicle, and performing final tests. We offer both mobile service (we come to you) and workshop visits.

Most modern petrol and diesel cars can be remapped. Exceptions include very old vehicles or some hybrid models. The best gains are typically seen on turbocharged engines. Contact us with your vehicle details or use our vehicle lookup tool to check compatibility and potential gains.

A remap can potentially affect your manufacturer warranty if detected during a warranty claim investigation. However, we use techniques to minimize detectability, and we provide our own comprehensive software warranty and satisfaction guarantee as protection.

Yes, we offer a 30-day satisfaction guarantee – if you're not happy, we'll adjust or refund, no questions asked. We also keep a secure backup of your original ECU file, so we can restore factory settings free of charge if ever needed. Our software itself comes with a lifetime warranty.

We proudly serve the Midlands region including Rugby, Coventry, Leicester, Lutterworth, Northampton, Kettering, Hinckley, Nuneaton, Leamington Spa, Warwick, and everywhere in between. We offer mobile service within a 20-25 mile radius of Rugby/Lutterworth, or you can visit our workshop.

Remap pricing depends on your vehicle and the type of tuning required. We offer competitive rates with payment options available. Contact us for a personalized quote based on your specific vehicle and requirements. We believe in transparent pricing with no hidden costs.

Absolutely. We keep a secure backup of your original ECU file and can restore the factory settings quickly and free of charge if you ever need to revert back to stock configuration.

It depends on how you drive. Our remaps increase your engine's torque and efficiency, meaning the car requires less throttle to maintain speed. If you drive gently, you could see 5-15% better fuel economy. However, if you utilize the extra power frequently, you may use more fuel during those spirited moments. The choice is yours!