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Q: How can a mechanic claim I have original plugs/wiring harness? on 1996 Lexus SC400

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Today an independent ASE certified mechanic told me that
I've never had my spark plugs or wiring harness changed.
My 15 year old Lexus drives like a dream at 122K and has had
regular maintenance at the dealer.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Sometimes there are tell tale signs that parts have never been replaced, but sometimes people can make mistakes.

I would recommend consulting your dealer to obtain full maintenance records - if possible. And/or check your own records to see what the history of work has been. This will make you an educated owner, if nothing else.
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