$675 for spark plug replacement???
This dealer has not ripped me off in the past (as far as I know), but this sounds like a crazy *** price to replace spark plugs. I told them no.
Any thoughts?
Thank you.
Went the DIY route on the 16 plugs and wires in the driveway in about 3 hours.
(Got to remove the wheels and inner fenders on an ML or risk get blindly gashed on a razor sharp heat shield among other scalpel like objects.)
Saved a load doing it.
You definitely need to remove the coil packs if you don't have the plug wires puller tool. I didn't have wire puller but were able to do the job with open end wrench. It not that hard but anyone want to try doing it yourself, start with the 2 back plugs first. If you can remove those 2 first, the rest is very easy.
If you do not feel any deterioration of performance or fuel economy, maybe you can wait 1-2 years.
My understanding is spark plugs do not fail all of a sudden. I would change them only when I feel somehting wrong.
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As for cost...
Need more info...parts costs and labor rate/ hours.
Is it 8 or 16 plugs? 16 x 10 = $160.
Labor rate? $150 x 3 = $450.
Shop Supplies = $20.
Tax = $18.
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of course i do not negotiate with terrorists....
the plugs were very pricey but when autozone runs a promotion you can get them at a good price.
as previously stated, the back two are challenging especially if you have big hands. coil packs just need to be detached, not removed
Last edited by billyhead1; May 16, 2012 at 10:45 PM.
As for the concerns over the electrolytic bonding, I've changed plugs that have been in engines for well over 100K with no problems. These plugs use gasket washers and not the old style tapered seats so that helps out a lot.




