Because the 07 f150s original plugs were a two piece plug that has a tendency to break when being removed ford has changed their recommend change to 50-60k. Make sure the shop that does the plug change is aware of the service bulletin ford put out and has the specially designed listle tool to remove broken plugs. I have read about some plug changes where most of the plugs have broken and charged $80. for each broken plug. I have been looking at places to have mine done and the best I can find is $200. plus $35. for each broken plug. I am at 60k so I need to have mine done soon.
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2016 Ram 2500
2016 Surveyor 251rks
K6VHG
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