I bought my 2009 Prius about 11 years ago. Although I've been diligent on all other maintenance, I've always delayed changing out the spark plugs - probably because I reasoned that the car was running well so I didn't want to mess with it. The car is still running great, but I think I need to finally change out the plugs. Here are my questions: Is this the correct spark plug, SK16R11, part # 90080-91184 How about the coils - at 170k should I just go ahead and replace them? I'll buy the plugs through my local dealer, but the coils at about $80+ each are not that cheap. However, I see 4 packs of Denso oem coils on Ebay for the price of 1 at the dealership. Anyone buy their coils on Ebay? How would I verify that they are not fakes? Lastly, I plan to buy a magnetic 5/8" socket - any recommendations? How about one like this with a swivel connection? Any other tips or suggestions for replacing spark plugs on a gen 2 Prius?
Never buy ebay parts - counterfeits are unregulated on ebay and amazon. I would leave your oem coils, just be careful you don't break the connector. Buy your plugs at a dealer. Let them look it up based on your vin.. Ask for a discount. It works sometime. Be very careful and slow pulling out plugs left in for 18 years. Same care going back in and use a torque wrench to tighten, Do not use an impact drill. Details
