I replaced the 3 wire sensor on my bimmer for under $60.

I bought a generic 3 wire Bosch sensor and spliced it in to the old connecter.

1.5 hours labor seems very very high.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record