Automobile Service of Bloomfield

I had my 1986 Honda Accord repaired there in 1992 the altenator light was on and the battery
was dead I knew it was the altenator. They said there was going to be a dianostic charge of $ 40 dollars to check it out. Anyway long story short it cost me more for them to fix it than the dealer the dealer didn‘t charge me the $ 40 and the altenator they put in only lasted 1 year. Fast forward to recently apparently they don‘t work on cars. I now have a 2010 Jetta Diesel
TDI. It has a bad oxygen sensor they said there was going to be a $ 80 diagnostic charge and it might not be the sensor. This is why I say they don‘t work on cars because they said they do not work on diesels. Come on its only an O2 sensor. and I only wanted an estimate.
I will never come back or refer anyone to them.