2006 Mercury Mountaineer problems & reliability
117 owner complaints filed with NHTSA for the 2006 Mercury Mountaineer, alongside 1 safety recall campaign. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
6 complaints report injuries (7 injured).
Federal crash records (FARS 2020–2023): 2006 Mercury Mountaineer vehicles were involved in 13 fatal crashes with 6 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling → | 43 | 37% |
| Power Train → | 39 | 33% |
| Engine → | 14 | 12% |
| Electrical System | 9 | 8% |
| Unknown OR Other | 9 | 8% |
| Structure | 7 | 6% |
| Seats | 6 | 5% |
| Fuel System, Gasoline | 3 | 3% |
| Vehicle Speed Control | 3 | 3% |
| Equipment | 2 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 58,945 miles (middle 50% between 41,500 and 86,546 miles), based on 93 complaints that included mileage.
Complaints by incident year
What owners report
“The contact owns a 2006 Mercury Mountaineer. The contact stated that her husband informed her that the vehicle had experienced an unknown radiator failure. The vehicle was taken to an independent mechanic, where the radiator was replaced; however, the failure reoccurred. The vehicle was repaired for a second time by…”
Engine and Engine Cooling · filed Dec 27, 2022
“My shifter continuously won’t come out of park. Multiple other people with the same kind of vehicle have posted on forums with the same issue. It’s happened weekly for a year or more. I keep getting told there’s a recall on it but can’t find it.”
Unknown OR Other · filed Sep 5, 2021
“There is a known issue with the cluster panel’s relay that has caused my headlights to flash off and on randomly as it malfunctions.”
Unknown OR Other · filed Jul 18, 2021
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
37 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2006 Mercury Mountaineer. The 10 most recent:
When performing any transmission fluid changes or topoffs involving MERCON SP, MERCON LV has replaced all versions of MERCON SP and can be used going forward. Mixing MERCON LV and MERCON SP in the same transmission is…
SSM 51909 · Service Bulletin/Repair Instructions · issued Sep 7, 2023
Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel…
TSB 19-2026 · Service Bulletin/Repair Instructions · issued Feb 7, 2019
Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel…
TSB 19-2026 · Service Bulletin/Repair Instructions · issued Feb 7, 2019
This SKU is a front upper ball joint. The Customer communication requested return of unsold inventory to inspect for ball studs with excessive rotational friction in the ball joint assembly. Excessive friction in the…
DOR-S3J9G-11 · Service Bulletin/Repair Instructions · issued Oct 2, 2018
Various vehicles equipped with a 4.6L, 5.4L, 6.8L modular 3 valve engine built on or before 8-Jan-2016 may exhibit symptoms that may include upper end engine noise, rough running, misfire and/or engine damage. If…
SSM 47331 · Service Bulletin/Repair Instructions · issued Jun 1, 2018
The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to diagnose possible ETB concerns. The IDS has a…
SSM 46085 · Service Bulletin/Repair Instructions · issued Sep 21, 2016
Ford/mercury: to prevent harness damage, on some vehicles, resulting in contact with tire or suspension components, proper routing of wiring harness for wheel speed sensor is key. 2006-2010 explorer, mountaineer…
ASI-44429 · Service Bulletin/Repair Instructions · issued Mar 1, 2014
Ford/lincoln/mercury: if battery was disconnected or dead, vehicles/trucks may experience hard starts and engine idle rpm fluctuation and exhibit diagnostic trouble codes (dtcs) p0505, p0506, p2111 and p2112. *pe
TSB-12-7-4 · Service Bulletin/Repair Instructions · issued Jul 10, 2012
Ford/mercury/lincoln: vehicles may exhibit one or more of the following symptoms: drive away hesitation, loss of rpm on deceleration, difficulty starting, and/or idle rpm less than desired. The f53 motorhome chassis is…
TSB-08-18-2 · Service Bulletin/Repair Instructions · issued Jun 1, 2009
Ford: some vehicles may exhibit oil separation from the internal lube found in the unitized cartridge seal. Oil separation appears to be and is often misdiagnosed, as an axle lube leak. *pe
TSB-08-19-3 · Service Bulletin/Repair Instructions · issued May 1, 2009
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2006 Mercury Mountaineer has 1 NHTSA recall campaign — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2006 Mercury Mountaineer?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 58,945 miles — budget accordingly if the car is approaching that mileage.