Premium Power for
Premium Vehicles
Specialist ECU remapping for BMW, Audi, Mercedes, Volswagen, Range Rover, and more across Cornwall.
Who We Tune
We focus on modern turbocharged mid-range and premium vehicles – not low-powered 1.0L runarounds.
BMW & Mini
3 Series, 5 Series, X3, X5, M Sport models
Audi & VW
A3, A4, A6, Q5, Golf GTI, Tiguan
Mercedes-Benz
C-Class, E-Class, GLC, AMG models
Range Rover & Land Rover
Sport, Evoque, Discovery, Defender
Performance Diesels
Modern turbo diesels with safe power potential
Performance Vans
VW Transporter, Mercedes Sprinter, Ford Transit
Why Choose SWA
Premium remapping done properly
Safe, Road-Ready Power
No silly maps or dangerous tuning. Every file is custom-written for reliability and real-world drivability, not just dyno numbers.
Diagnostics First
We refuse to map unhealthy cars. Full health check included to ensure your engine is in proper condition before any tuning.
Premium-Only Focus
We specialise in mid-range to high-end vehicles. Honest advice, no time-wasters, and we'll walk away if the job isn't right.
Mobile Across Cornwall
Based in Carbis Bay, we come to you anywhere in Cornwall. Professional service at your home or workplace.
How It Works
Simple, transparent process from quote to road test
Quick Chat & Quote
Tell us your car, engine and goals. We'll confirm what's safely achievable and provide transparent pricing.
Health Check & Diagnostics
Full diagnostic scan to ensure your engine is healthy. If we find issues, we will advise honestly before proceeding.
Custom ECU Remap
Bespoke tuning file written specifically for your vehicle. Optional gearbox tuning where supported.
Road Test & Aftercare
Thorough road test to verify gains. Full explanation of changes and ongoing support included.
Real Results
Typical gains from our custom remapping
BMW 320d
Stronger mid-range and motorway pull
Audi A4 2.0 TFSI
Sharper response, more exciting drive
VW Transporter
More torque for towing and loads
What Clients Say
Real feedback from premium vehicle owners
"The difference is night and day. Smoother power delivery and the mid-range pull is incredible. Reece explained everything clearly and the car feels factory-fresh but with proper performance."
James Mitchell
BMW 530d
"Honest service from start to finish. Reece found a minor issue during diagnostics and sorted it before the remap. The car now drives exactly how I wanted – responsive and exciting."
Sarah Thompson
Audi A5 2.0 TFSI
"Needed more torque for towing our horsebox. The remap has transformed the van – pulls like a train now. Professional job and great communication throughout."
Mark Davies
VW Transporter T6
Our Services
ECU remapping and performance tuning in Cornwall
Stage 1 ECU Remap
Safe, road-ready performance gains with improved throttle response, power delivery and drivability. Custom-written files for your specific vehicle and driving style.
- Increased power & torque
- Better throttle response
- Smoother power delivery
- Maintained reliability
Eco & Torque Mapping
Optimised for fuel economy and low-end torque, perfect for diesels and vans. Ideal for towing, load carrying and motorway cruising.
- Improved fuel economy
- Enhanced low-end torque
- Better for towing
- Reduced turbo lag
Gearbox (TCU) Tuning
Sharper gear changes, improved shift points and better power delivery through the gears. Available on supported automatic transmissions.
- Faster gear changes
- Optimised shift points
- Better power delivery
- Enhanced driving feel
Diagnostics & Health Checks
Comprehensive diagnostic scan included with every remap. We refuse to tune unhealthy vehicles and will advise on any issues found.
- Full diagnostic scan
- Fault code reading
- Health assessment
- Honest advice
Legal Compliance
We do not promote or carry out illegal modifications for road use, including DPF, EGR or AdBlue removal on vehicles used on public roads. All our remapping services are designed to maintain emissions compliance and vehicle safety standards.
Meet Reece
I'm Reece Charlesworth, founder of SWA Automotive. I started this business because I was tired of seeing cowboys offering dangerous maps and unrealistic power claims.
My approach is simple: meticulous tuning focused on drivability, reliability and long-term ownership. Every file is custom-written, every car gets a full health check, and I only work on vehicles I know I can improve safely.
I specialise in premium and mid-range vehicles – BMWs, Audis, Mercedes, Range Rovers and performance vans. If you're serious about your car and want honest advice, not sales pressure, you're in the right place.
"I'd rather walk away from a job than map a car that isn't healthy or safe."
— Reece Charlesworth
Ready to Feel Real Power?
Send us your reg and engine and we will confirm safe gains and pricing.
Get Your Custom Quote
No pushy sales. We will review your details, confirm safe gains and get back to you with options.