Tesla high-voltage battery repair in Surrey
The high-voltage battery is at the heart of every Tesla. When a battery fault appears, accurate diagnosis matters more than anything, because the difference between a repair and a new battery is often thousands of pounds.
verified_user1-year warranty on parts, from the invoice date
What we can do
- Fault diagnosis: BMS warnings, isolation faults, reduced power or range, and charging problems.
- Battery health assessment: a clear picture of the battery's condition, before you buy, sell or commit to a repair.
- Battery repairs: where the fault is in a part of the pack that can be repaired, we repair it instead of replacing the whole battery.
- Battery heaters and related components: faults that often start small but escalate quickly.
- Battery replacement and upgrades: for Model S and Model X, including upgrading a Model S 85 to a 100kWh pack.
We can repair or replace batteries for Model S and Model X. We do not repair Model 3 batteries, but we can replace them, depending on availability and compatibility.
Repair, not replace, where it makes sense
A battery warning does not automatically mean a new battery. A Model S 85 with a BMS voltage fault came to us facing that prospect. We traced the fault to one module and repaired the pack instead. Another Model S had a high-voltage battery heater fault, and with genuine Tesla heaters in stock, it was back on the road the same day.
Sometimes the fault is not where it seems. A Model S 85 arrived with coolant pouring from the battery connector, and the real problem turned out to be how the pack had been refitted after a repair elsewhere.
Equipped for battery work
Our workshop has a dedicated battery removal platform, so when a pack has to come out, it comes out safely and properly. Our technicians hold IMI Level 2, 3 and 4 qualifications in electric and hybrid vehicles, and we use Tesla Toolbox 3 for diagnostics.
A clear plan before any work
Battery problems can be complex and expensive. We carry out a thorough diagnostic assessment first, explain what we have found in plain English, and recommend the repair that suits the car and its condition. If you are weighing up a repair against selling the car, we will tell you honestly what we think.
