Mobile ECU Remapping & Vehicle Diagnostics in South East Wales & Gloucestershire
Welcome to ExTech Tuning
Unlock your vehicle’s true performance and security with ExTech Tuning – the leading mobile ECU remapping specialists covering South East Wales and Gloucestershire. We deliver expert performance tuning, fuel‑economy remaps, custom calibration, emission solutions, and full vehicle diagnostics directly to your door.
We’re also trusted vehicle tracker and immobiliser installers, providing advanced GPS tracking, S5/S7 Thatcham‑approved systems, and anti‑theft immobilisers to keep your car protected 24/7. Whether you want more power, better efficiency, or stronger security, ExTech Tuning brings professional results wherever you are.
Performance Remapping — Precision ECU tuning for maximum power, sharper throttle response, smoother torque delivery, and fully customised driving dynamics. Optimised maps improve fuel economy, engine efficiency, and overall vehicle performance for cars, vans, 4x4s, and commercial fleets.
Vehicle Emissions Solutions — Professional AdBlue, DPF and EGR solutions designed to reduce faults, prevent limp‑mode issues, and restore reliable engine operation. Ideal for diesel vehicles needing DPF regeneration, EGR optimisation, or AdBlue system repairs to keep running clean and compliant.
Vehicle Diagnostics — Advanced diagnostic testing using dealer‑level equipment to identify engine faults, electrical issues, sensor failures and performance problems. Fast, accurate fault‑finding for ECU errors, warning lights, misfires, and vehicle health checks.
Vehicle Security Systems — High‑security CAN‑bus immobilisers and GPS vehicle trackers for theft prevention and real‑time monitoring. Protect your car with anti‑theft immobilisation, live tracking, geo‑fencing, and secure driver ID systems for maximum peace of mind.
We support all major manufacturers including:
What People Are Saying
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Very helpful/knowledgeable guys and explained all options available for the car Much better mid range torque and engine sounds smoother as well
— Former Customer
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Very professional guys arrived on time as agreed Great communication from booking to completion. Great explanation of the process to remap my mondeo It’s Given a new lease to my car and the test drive on completion showed the benefits of having it remapped. Thank you both Good price 👍🏼 Highly recommend Extech Tuning Ltd
— Former Customer
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Very polite and friendly guys, quick to respond and even quicker getting the job done. Fair prices too! Would use again and highly recommend, thanks guys!
— Former Customer