Mercury Mountaineer 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 Mercury Mountaineer based on all problems reported for the Mountaineer.
Oxygen sensor. Replaced by Ford on 1/17/05. Has 69336 miles. 11/14/04 replaced air filter in order to "extend life" of O2 sensor. 2/5/04 weak fuel pump 49804 miles. 10/13/03 oxygen sensor replaced. 45742 miles. 10/9/03 mass air flow sensor replaced. 45616 miles. 8/21/03- replace iac. 43536 miles. 5/22/03 replace oxygen sensor. 41308 miles.
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all problems of the 2000 Mercury Mountaineer
🔎.