2004-2012 model years · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2004-2012 Mitsubishi Galant has 2 documented known issues, with 1 rated critical. The most serious is Automatic Transmission Failure ($1,500-$4,000 repair). Across all issues, repair costs range from $500 to $4,000. DIY maintenance guides at au7o.io.
On the 2004-2012 Mitsubishi Galant 3.8L 6G75 V6, the 4-speed automatic transmission in the Galant is known for premature failure, particularly in V6 models. Internal clutch pack wear and valve body issues cause harsh shifting, slipping, and eventual transmission failure between 80,000 and 120,000 miles.
Change ATF every 30,000 miles and install an auxiliary transmission cooler. When failure occurs, a remanufactured transmission is the most cost-effective solution. Avoid aggressive driving to extend transmission life.
On the 2004-2012 Mitsubishi Galant, the Galant AC compressor is prone to premature failure, with the clutch bearing seizing or the compressor developing internal leaks. This is a common issue across multiple Mitsubishi models sharing the same AC platform.
Replace the compressor, receiver/drier, and expansion valve. Flush the system thoroughly to remove any debris. Use the correct PAG oil specification for the replacement compressor.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
MITSUBISHI IS RECALLING CERTAIN MODEL YEAR 2010 GALANT VEHICLES. THE AUTOMATIC TRANSMISSION OIL COOLER PIPE ASSEMBLY ON SOME VEHICLES MAY HAVE INSUFFICIENT PLATING TO PREVENT CORROSION, IF THE PIPE SHOULD DEVELOP A HOLE DUE TO CORROSION, AUTOMATIC TRANSMISSION FLUID LEAKAGE MAY OCCUR.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.
According to Au7o's analysis of 0+ owner reports, the 2004-2012 Mitsubishi Galant has 2 documented issues. The most frequently reported are: Automatic Transmission Failure, AC Compressor Failure. Of these, 1 is rated critical and should be addressed promptly.
The 2004-2012 Mitsubishi Galant has 2 known issues documented across 0+ owner reports. 1 issue is rated critical: Automatic Transmission Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Mitsubishi Galant issues range from $500 to $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Automatic Transmission Failure, typically costs $1,500-$4,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Reliability varies across model years of the Mitsubishi Galant. Based on owner reports, issues are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2004-2012 Mitsubishi Galant with 2 documented issues from 0+ owner reports.
The 4-speed automatic transmission in the Galant is known for premature failure, particularly in V6 models. Internal clutch pack wear and valve body issues cause harsh shifting, slipping, and eventual transmission failure between 80,000 and 120,000 miles. Repairs typically run $1,500-$4,000. Severity: high.
The Galant AC compressor is prone to premature failure, with the clutch bearing seizing or the compressor developing internal leaks. This is a common issue across multiple Mitsubishi models sharing the same AC platform. Repairs typically run $500-$1,200. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
