HHR L4-2.2L (2007)
1. If reinstalling the old HO2S, coat the threads with anti-seize compound GM P/N 12377953 or equivalent.
Notice: Refer to Fastener Notice.
2. Install the HO2S.
Tighten the sensor to 42 N.m (31 lb ft).
3. Install the HO2S electrical harness lead (2) into the trough (1) on the exhaust heat shield, and bend the trough up slightly.
