I have had my 2007 4Runner for a couple of years and when I bought it it has a great service history. One thing I noticed was there was not much more that oil changes. So I bought spark plugs for it, then a divorce and moving got in the way. Any way, I stumbled across the plugs this week so I changed the plugs. My 4runner had Denso on the passenger and NGK on the drivers side. Do you think that these plugs really lasted 231,000 miles? Odometer pic for proof.
2007 spark plugs
- Thread starter MFreund
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AuSeeker
Elite Member
Yes those should/would be the original plugs, The left and right heads came from different factories in Japan and for whatever reason the 2 factories had different brand spark plugs which were installed in the heads before being shipped to where they did engine assembly.
It's possible that a Toyota dealership, a independent garage or a previous owner stocked or purchased both brands and replaced plugs per what was installed at the factory but I highly doubt that's the case.
BUT, don't wait that long to do another replacement of the plugs, copper plugs which is what is specified for the V6 should be replace at 30,000 miles.
