Tel: 07471329097 Email: tz@supremeautoelectrics.co.uk
Auto electrical experts for modern vehicles.
Dealer-level diagnostics, ECU & module repair and coding, ECU remapping, DPF cleaning, and car key cutting & coding. Transparent pricing, fast turnaround, Southampton & surrounding areas.
We serve customers across Hampshire, including:
Southampton, Eastleigh, Portsmouth, Winchester, Romsey, the New Forest, Basingstoke, Bishop’s Waltham, and all surrounding areas.
Case Study: BMW X5 No-Start Fixed Same Day
The challenge:
A customer brought in a BMW X5 (2016) that refused to start. Warning lights flashed across the dashboard, and multiple fault codes appeared in several modules. The main dealer advised a full ECU replacement costing thousands, with a wait of up to two weeks.
Our approach:
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Ran a full dealer-level diagnostic scan.
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Traced the issue to a short in the CAN-bus network.
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Bench-tested the ECU and confirmed it was repairable.
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Repaired and re-coded the ECU in-house the same day.
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Cleared all fault codes and verified communication across modules.
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Completed a full road test and issued a diagnostic report.
The result:
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Vehicle back on the road the same day.
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Customer saved over £1,200 compared to main dealer replacement.
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Work covered by our 12-month workmanship warranty.
Customer feedback:
“Brilliant service. I was told I needed a whole new ECU, but Supreme Auto Electrics repaired mine the same day and saved me a fortune. Highly recommended.”
Key takeaway:
Dealer-level solutions without dealer-level prices.
Services ​​
After-Market Upgrades That Power Safety & Performance
Cameras, towing electrics, sensors, beacons, and more — expertly installed by Supreme Auto Electrics.