Infiniti QX4 owners have reported 1 problem related to emission control (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Infiniti QX4 based on all problems reported for the QX4.
Consumer stated O2 sensor was causing check engine light to come on and stay on. This has been going on for the last 6 months. Consumer took the vehicle to the mechanic, and was subjected to having a wiring harness installed. Consumer had that done, but it did not solve the problem. They were talking about another $1200. 00 to repair something else.
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all problems of the 1999 Infiniti QX4
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