Necessary knowledge: An electric car still has tyres, brakes, suspension, air conditioning and a 12-volt system. Many ordinary workshops can service those parts. The dividing line is work that may expose the traction battery, orange high-voltage cables, power electronics or a damaged vehicle structure.
Start with the job, not the badge on the building
Ask the workshop to explain whether your specific repair involves the high-voltage system. A tyre replacement is not the same task as diagnosing an isolation fault, removing a battery pack or repairing a crash-damaged floor. A good workshop should be able to describe the boundary clearly and say when it must isolate the vehicle or refer the job elsewhere.
Seven questions worth asking
- Are your technicians trained for this model and this level of work? Training for routine maintenance is not automatically training for opening or removing a high-voltage battery.
- Can you access the manufacturer’s service information? Correct lift points, shutdown procedures, torque values, diagnostic steps and software requirements can be model-specific.
- Do you have suitable diagnostic equipment? Reading generic fault codes is not always enough. Ask whether the workshop can diagnose the battery-management, charging and thermal-management systems.
- How do you make the high-voltage system safe? The answer should involve a documented procedure, correct protective equipment and verification that hazardous voltage is absent—not guesswork.
- Can you lift the car correctly? Battery housings often occupy much of the underbody. Incorrect lifting can damage the enclosure. The workshop should use the specified lift points and inspect for existing underbody damage.
- What happens if the battery may be damaged? A crashed, flooded, overheated or deeply struck battery may need isolation, monitoring and special storage. Delayed ignition is possible after serious damage.
- How will the work be documented? Request an itemised estimate, fault findings, test results, software actions, parts used and any effect on warranties or future service records.
Red flags
- The workshop says all EVs are basically identical.
- It cannot distinguish the 12-volt system from the high-voltage traction system.
- It proposes lifting or welding before checking the manufacturer’s procedure.
- It will not explain whether replacement parts, software or calibration are required.
- It dismisses a visibly damaged battery enclosure as cosmetic without inspection.
Independent workshop or authorised dealer?
Neither label guarantees the best answer for every job. An independent specialist may have deep EV expertise and competitive repair methods. An authorised dealer may have faster access to model-specific software, technical campaigns and warranty handling. Compare competence for the actual task, diagnostic access, price, turnaround time and warranty consequences.
Before approving the repair
Ask for the diagnosis in writing, not only a proposed expensive component. Confirm whether the quotation includes diagnostics, coolant, seals, programming, calibration and disposal. For a battery fault, ask whether the workshop has tested the complete pack, a module, sensors, contactors, cooling and wiring before recommending replacement.
Reviewed 17 October 2026. This article is general safety information. Always follow the vehicle manufacturer’s instructions and local workplace-safety rules.