Join Date: Apr 2018
Location: At the bottom of the California Sierra Mountains
We ( The shop)would only replace the authorized parts, but would recomend other parts while in the area because of the savings considering labor of separate parts. i.e. one example, V8 very high mileage engine with coil-in plug, one coil labor is 80 bucks while all 4 on one bank is 20 dollars more @ 100. Sure you will spend more for parts, additional 3 other coils but the chances of others failing are a consideration balanced between intended use of the vehicle and budget. Pay a little more now or much more later?
DIY (do it yourself) IMHO ( I always do myself) while in a an area needing removal of parts to get to the part needing to be replaced, should replace gaskets and seals, clean all parts like sensors and connectors wire coverings, and wipe down all surrounding parts that are close and now mostly accessible while the target part is being replaced.
.....do a job once or do it several times....