My car had had components below it stolen (literally power-sawed out) which made it drive very loudly and unpleasantly. I brought it into Zahntech to be looked at in December, which they said they'd get around to looking at, ordering parts, and fixing exactly by the time I got back. The precise week before I'd need it back, I decided to check back, as they hadn't given me a single call since I had brought the car in. When I called, I realized they had mistyped my phone number, and were waiting for my input on whether I wanted to get a refurbished or factory-fresh component for the car. I decided to go with refurbished since that'd be faster. The next day, they call me up to tell me they had received the part and utterly underestimated how much needed to be replaced (a bolder alternative to the "measure twice cut once" methodology: "measure nonce order once"). They were able to refer me over to another place in Kirkland that would get it done cheaper and sooner, then charged me about 80$ for an oxygen filter - I'm not actually sure where it is though, if they put it in the car, installed it into the car's parts, or if they just sent it over to the other place, but the phrasing I heard made it sound like I'd have to hand it over? I searched my entire car for the piece and couldn't find it. In any case, they were polite and economically minded for me, so that's a big plus in my eyes.