Cost to install a spark plug insert?
A friend with a 740i managed to take the threads out with a spark plug, and the dealer says BMW does not authorize a field repair, and the only fix is a $9000 head replacement.
No local shops will warranty the job, and they want almost $400 to do it at that, which my buddy says is outrageous (I say it's cheaper than $9000, though!). The cost for an insert/heli-coil is under $10, so what is a reasonable fee he should have to pay to have one installed, and do they usually hold up?
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