What this usually means
95% the plastic coolant transfer pipes (known M48 V8 issue). Real fix: aluminum upgrade pipes $1,800-2,500 installed. Agent quotes $4,500+ with original plastic pipes that re-fail.
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.
This is not a final diagnosis. It is a money-saving checklist before you go workshop.