Do I need a diagnosis before requesting a repair?
Not always, but the enquiry should distinguish a confirmed fault from a suspected one. Investigation may need its own scope and estimate.
Can a repair estimate change?
It can when inspection reveals different or additional work. The workshop should explain the new findings and obtain approval before extending the job.
Can I choose which parts are used?
Ask what part options are appropriate for the vehicle and repair. Availability, specification and warranty terms need confirmation for the actual job.
What records should I keep?
Keep the estimate, approval, invoice and any supporting test or parts information with the vehicle history.
What warranty applies to repairs?
Warranty terms depend on the work and parts supplied. Ask for the applicable terms in writing before authorising the repair.