What one of the other Posters said is true. They only warrant the work that they did or damage to the body or interior that happened while the car was in their car.

Where I worked when an expensive Care came in we took pictures of the outside and interior so the Customer could not clam we messed it up.

I actually stopped working on my own Mothers Car because if I worked on something in the rear of the Car I got blamed for something that went wrong on the front of the Car.

My Mothers perception was the same as the OPs. There was nothing wrong in the front of the Car till I worked on the Rear of the Car.

Every month on this forum something suddenly happens to someones old Car. We do not like it but our Old Cars are on barrowed time.

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84 300D, 82 Volvo 244Gl Diesel