What this usually means
Battery discharge warnings can be old battery, IBS sensor, parasitic draw, or coding issue. Do not replace alternator first unless charging output is proven weak. Ask for battery registration history and sleep-current test.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: ISTA
This is not a final diagnosis. It is a money-saving checklist before you go workshop.