One problem related to emission control has been reported for the 2000 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Mercury Mountaineer based on all problems reported for the 2000 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.
| Engine And Engine Cooling problems | |
| Gasoline Engine problems | |
| Blown Head Gasket problems | |
| Emission Control problems |