This is for a 2018 VW Tiguan Allspace with 49,000 km (34500 miles). Living in a pretty mild climate (ie no snow and no extreme heat), but near the coast. The pad wear light came on and I scheduled the service with the dealer. I got a call later to say that the rotors should be replaced and they always recommend replacing the rotors with the pads because "European Cars use softer metals in their rotors". I would completely agree with replacing the rotors if:
- The rotors had scoring, rust etc on their faces
- The rotors were warped
- The rotors were at minimum thickness.
- The rotor on one side was needed replacement (in this case I think you should do both)
I thought that the whole purpose of pads is that they take the bulk of the wear, and then you replace them more frequently than the rotors (and calipers). Theoretically I think it would require less time to replace just pads (seems that way in motor racing). I guess I would expect to replace rotors, which have none of the issues in the above list, maybe every second pad replacement.
We do occasionally tow a 1500kg caravan, but I would expect this to create higher wear on the pads.
If the reason hadn't been "European Cars use softer metals in their rotors", I probably wouldn't be asking questions.
Also, if the rotors have no visible damage, when you replace pads, why would any resurfacing be required. Surely the new pads will bed into the existing rotors after 100km (60 miles) or so.
Appreciate any thoughts.