SOURCE: O2 sensor
There should be two O2 sensors. If you look inbetween the engine and radiator following the exhaust manifold down to the exhaust pipe you should run into the 1st O2 sensor, following the pipe down stream under the vehical towards the catalytic converter you should find the second O2 sensor. The 1st O2 should be easy but the 2nd might be difficult depending on your abilities. Coils will depend on 4 or 6 cyls, 1 for each cyl. Repair man, go to, pep boys, napa, auto zone, advanced auto parts to name a few.
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