2004 Mercury Mountaineer Power Train:automatic Transmission Problems
NHTSA component category: POWER TRAIN:AUTOMATIC TRANSMISSION · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train:automatic transmission ranks on this vehicle
Share of the 210 complaints citing each category; one complaint can cite several. Full breakdown on the 2004 Mercury Mountaineer overview page.
What owners report
“I HAVE A USED 2004 MERCURY MOUNTAINEER I PURCHASED IN 12/2008 IT HAD 53,000 MILES. I HAVE DONE ALL OF THE REQUIRED MAINTENANCE OIL CHANGES,BRAKE…”NHTSA complaint 10408434 — filed 06/22/2011
“AUTOMATIC TRANSMISSION SHIFTER COMPLETELY BROKE OFF WHEN CHANGING FROM PARK TO DRIVE ON A 2004 MERCURY MOUNTAINEER.”NHTSA complaint 10404052 — filed 06/01/2011
“THE CONTACT OWNS A 2004 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE VEHICLE BEGAN TO EXPERIENCE A VERY HARD SHIFT WHEN CHANGING GEARS AND DRIVING…”NHTSA complaint 10378616 — filed 01/25/2011
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train:automatic Transmission complaints by year filed
Frequently asked questions
Does the 2004 Mercury Mountaineer have power train:automatic transmission problems?
Power Train:automatic Transmission is the #2 most-reported problem area on the 2004 Mercury Mountaineer: 36 of 210 complaints on file (17.1%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2004 Mercury Mountaineer have in total?
210 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 11 involved a crash, 2 involved a fire, 16 reported injuries, and none reported deaths.
What does NHTSA's power train:automatic transmission category include?
NHTSA assigns each complaint to standard component categories; this page reports the POWER TRAIN:AUTOMATIC TRANSMISSION category exactly as NHTSA defines and records it.
