There are 3 owner-reported powertrain & transmission complaints for the 2009 Lincoln MKXin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I'VE REPLACED A STARTER / ALTERNATOR/ BATTERY/ COIL PACKS/ TUNE UP/AND MY TRUCK IS STILL HAVING PROBLEMS WITH STAYING STARTED..I HAVE TO PUSH THE GAS IN PARK BECAUSE IT SEEMS LIKE IT WILL SHUT OFF.
Automatic transmission is slipping badly. Results in temporary loss of power & speed. Taking my foot off the gas pedal, for two-to-three seconds, seems to remedy the situation. It's quite scary losing control of the vehicle during that period. Below, I am identifying an "approximate date"; however, this issue has been ongoing for quite some time - At least one, perhaps two, years. A mechanic's remedy may be checking the transmission fluid, or having the fluid replaced. I ensure I keep the fluid at its' proper level and I'm not replacing the fluid. I don't believe any transmission fluid ever needs draining and replacing - I think that's a scam when it's suggested!
THE PTU (POWER TRANSFER UNIT) IS CAUSING ENGINE LIGHT TO FLASH AND LOSS OF POWER WHEN ACCELERATING. TRANSMISSION SPUTTERS AND SEEMS TO BUCK AS IF NOT FINDING THE GEAR (ALMOST ALWAYS AROUND 2ND GEAR).
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026