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Where are all of the oxygen sensors located on an 99 infinity qx4?
Wiki User
∙ 14y ago
This vehicle has 4 oxygen sensors. The front two are located in the rear of the engine compartment by the firewall, one on the left exhaust manifold head pipe and one on the right exhaust head pipe. The other two are under the vehicle by the catalytic converters. They screw into the exhaust system and have a plug at the end of it attached by shielded wires that should be connected.
Wiki User
∙ 14y ago
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