Bought 4 Dorman TPMS sensors in June. Costs $5 to ship all 4 to my door. 1 sensor was defective (reading pressure too high) and they charged me $13 to ship the one item back. Really??

Now a second sensor exhibits same issue so even though it's a warranty issue, It's going to cost me a total of CAD$26 to have the 2 sensors replaced under warranty.

Beware.