"Stage 2 remap on my M340i and it feels like a different car. Harshz came to my driveway in Ealing, set up in an hour and the results speak for themselves. Throttle response is night and day."
James P.
BMW M340i · March 2026
Mobile service · West London
We don't just modify.
We transform.
10+
Years
500+
Cars Tuned
24/7
Mobile
Mobile ECU tuning, ambient lighting and premium modifications — built around your car, delivered to your door.
View PortfolioWhat we do
Four pillars. One workshop on wheels.
ECU Tuning
Stage 1–3 remaps unlocking real power, torque and throttle response.
Custom Mods
Ambient lighting, starlight headliners, body kits and interior upgrades.
Servicing & Repairs
Full mechanical care from oil changes to timing chains and clutches.
Security & Coding
Ghost immobilisers, dealer-level diagnostics and hidden feature activation.
Brands we cover
Trusted across every make
From German performance to Japanese reliability — we tune, service and modify them all.
Commercial vehicles
Fleet tuning &
emissions solutions.
Specialist mobile remapping and emissions support for vans and light commercial vehicles — keep your fleet running clean, efficient and reliable.
- DPF cleaning & regeneration solutions
- EGR valve diagnosis & repair
- AdBlue system fault solutions
- ECO remaps to reduce fuel consumption
Signature work
Built for drivers who notice the details.
Stage 1–3 ECU Performance Tuning
Custom remaps and DSG/TCU tuning tailored to your car — more power, smoother shifts, sharper response.
Learn more
Ambient Lighting & Starlight
Transform your cabin with premium ambient LEDs and fibre-optic starlight headliners.
Learn more
Brakes, Body & Performance
Caliper painting, body kits, exhaust upgrades and turbo work — the details that set you apart.
Learn more
Mobile coverage
We come to you.
Across West London.
Our mobile tuning and modification service covers a 20-mile radius from West London, bringing specialist work to your driveway, workplace or garage.
- 20-mile mobile service radius
- Same-day appointments where available
- ECU tuning, coding and diagnostics on location
Loading coverage map…
Premium Quality
Expert Technicians
Latest Technology
Honest Pricing
Performance Guaranteed
Your vision. Our passion.
One unmatched result.
Get a no-nonsense quote for tuning, mods or servicing. We'll come to you across West London.
Customer reviews
What drivers are saying.
4.8 average · 6 reviews
"Had the starlight headliner and ambient lighting kit fitted — the install is absolutely spotless. You can't tell it wasn't factory. Really pleased and the price was fair."
Priya S.
Audi A3 · February 2026
"Stage 1 + DSG tune. Gains matched exactly what was quoted on the dyno sheet. Honest, no upsell, and he stayed until every fault code was clear. Top guy."
Danny K.
VW Golf R Mk8 · January 2026
"Runs a fleet of 4 vans — got the ECO remap done across all of them. Noticeable drop in fuel bills within the first month. Mobile service saved me a full day of downtime."
Marcus T.
Ford Transit Custom · December 2025
"Ambient lighting install and coding for a few hidden features. Really happy with the finish. Only reason it's not 5 stars is I had to wait a couple of weeks for a slot — clearly in demand!"
Sophie L.
Mini Cooper S · November 2025
"Ghost immobiliser fitted and a custom map. Professional throughout, explained everything, and the car pulls harder than ever. Wouldn't go anywhere else now."
Rav D.
Mercedes C63 AMG · October 2025
Leave a review