Mobile Vehicle Tuning, Diagnostics & Security Specialists
South East Wales & Gloucestershire
Performance, economy, emissions solutions and vehicle security—expert mobile service at your door.
Welcome to ExTech Tuning
ExTech Tuning is South Wales' mobile specialist for vehicle performance, diagnostics, and security.
We provide expert ECU remapping, diagnostics, emissions solutions, vehicle trackers, immobilisers, and dashcam installations for drivers who expect more from their vehicles. Combining technical expertise with a convenient mobile service, we deliver tailored solutions that enhance performance, improve efficiency, and help protect your vehicle from modern theft and road risks.
Wherever you're located across South East Wales, Bristol, or Gloucestershire, ExTech brings professional automotive services directly to your doorstep.
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, GPS vehicle trackers and dashcams for theft prevention, real-time monitoring and incident recording. Protect your car with anti-theft immobilisation, live tracking, geo-fencing, and secure driver ID systems for complete peace of mind.
We support all major manufacturers including:
What People Are Saying
-
Very helpful/knowledgeable guys and explained all options available for the car Much better mid range torque and engine sounds smoother as well
— Customer
-
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
— Customer
-
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!
— Customer