Don't hesitate, let this be your first and only call for vehicle servicing... Diagnostic / Ignition Repair After doing my own tune up on 2011, Lexus, is250, my vehicle started to sputter, idle rough, check engine light and misfires... mind you, I do not trust many shops and prefer doing my own work unless it is past my ability. I couldn't figure out what was wrong, considering that I purchased the "correct" parts for my vehicle and it wasn't my first tuneup. I can replace parts but diagnosing problems isn't up my ally, so I decided to take it to a shop. I called a few "Lexus specialist" told them what I replaced, what was going on and asked if I could bring it in. They all said no and recommended me to take it to the dealer. "P.A.R." Was my last call, but should have been my first! They were so confident they could find the problem that they simply told me to bring it in. I felt their confidence level was to good to be true but I made an appointment and decided to give them a shot over the dealer (based on yelpers ). The moment I walked in, I felt that the shop wasn't shady, felt upscale, greeted me with great customer and quickly brought in. I provided full details on what I replaced, there was no hesitation and their confidence level was reassuring. After my free courtesy ride to work, and in just a couple hours later they had diagnosed the problem... The NGK ruthenium spark plugs I purchased specifically for my vehicle were incorrect. The parts store sold me the wrong plugs, causing misfire and destroying my coils that were still in good condition. They replaced the plugs and coils, gave me the old parts to return to the parts store and finished up the job. Thank you P.A.R. For not turning me away and sending me to the dealer, finding and fixing the problem! You have gained my trust and I plan to take all my vehicles to you for repairs as needed!!!!