Mobile ECU Remapping & Gearbox Tuning in North Somerset & South Wales

MTechTuning provides professional mobile ECU remapping, gearbox tuning and vehicle performance services across North Somerset, South Wales and the surrounding areas. We specialise in BMW vehicles but also cover a wide range of other manufacturers, including Audi, VW and performance petrol and diesel models, delivering reliable and safe tuning using dealer-level diagnostics.


At MTechTuning, we are your trusted partner in maximising your vehicle’s performance and efficiency through professional remapping. Based in North Somerset and South Wales, and covering areas including Bristol, Weston-super-Mare, Chepstow, Cardiff and Newport, we offer a wide range of specialised services including mobile remapping, ECU Remapping, Gearbox Remapping, diagnostic health checks and performance solutions such as DPF, EGR, AdBlue and decat options.


We also provide a wide range of additional performance options, which you can view via our services pages. We work closely with NeosBeemers, making us a go-to destination for BMW performance hardware installations and exhaust modifications.


Serving North Somerset and South Wales, our experienced team is dedicated to unlocking the true potential of your vehicle while maintaining reliability, drivability and long-term engine safety, ensuring an improved and more responsive driving experience every time you get behind the wheel.

Mobile Remapping

We can come to you wherever you are in North Somerset or South Wales for ultimate performance and convenience!

ECU and Gearbox Remaps

We are able to remap your car to provide better performance and also economy, this will increase performance and save you money at the pump.

Additional Options

We offer a range of comprehensive services and solutions to make your vehicle unique & increase the performance or better the reliability.

Ford Kuga Stage 1 Engine

May 22, 2026
Ford Kuga Stage 1 ECU Remap

BMW 320d Stage 1 Engine & Gearbox tune

May 22, 2026
BMW 320d Stage 1 ECU Remap & Gearbox Tune

BMW X5 40d Stage 1 Engine tune

May 13, 2026
This BMW X5 40d received a custom Stage 1 ECU remap from MTech Tuning Ltd .  Performance Figures Stock Power: 306 hp / 600 Nm Stage 1 Power: 340 hp / 680 Nm Gains: +34 hp / +80 Nm The BMW 40d platform responds extremely well to Stage 1 tuning, delivering noticeably stronger mid-range performance, improved throttle response, and smoother power delivery throughout the rev range. The additional torque improves overall drivability while maintaining the refinement expected from the X5 platform. Optional Software Add-Ons Available add-ons include: Speed limiter removal Dealer-Level Diagnostics Included All tuning work includes advanced dealer-level diagnostics before and after programming to ensure the vehicle is operating correctly throughout the process. Fully Mobile BMW Remapping Service MTech Tuning provides fully mobile ECU remapping across North Somerset & South Wales. We can carry out tuning at your home or workplace with no additional travel charge. Areas covered include: Bristol Weston-super-Mare Cardiff Newport North Somerset South Wales Why Tune a BMW X5 40d? A Stage 1 remap on the BMW X5 40d improves: Mid-range pulling power Overtaking performance Throttle response Overall drivability The factory hardware on the BMW 40d engine comfortably supports Stage 1 power levels, making it one of the most popular BMW diesel engines for tuning. Looking for BMW X5 40d Tuning? Use the Instant BHP Checker at MTech Tuning Ltd to check available tuning options for your vehicle. 0% finance options available.

Pay just 25% of your bill today

NO FEE NO INTEREST NO CATCH

£200 minimum spend

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