There are 3 owner-reported powertrain & transmission complaints for the 2009 Volvo S40in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
REPLACEMENT OF CV JOINTS- OCTOBER 2018 MY VEHICLE WAS DIAGNOSED WITH LEAKAGE FROM THE CV JOINTS WHICH SPLATTERED ALL UNDERNEATH MY VEHICLE. MY VEHICLE ONLY HAD 69,000 MILES. THE TECHNICIAN STATED THAT THEY SHOULD NOT HAVE BEEN A PROBLEMS WITH SO FEW MILES. HE STATED THAT MY VEHICLE'S STEERING WOULD HAVE BEEN COMPROMISED IF THEY HAD FAILED AND CAUSE DAMAGE TO MY ENGINE. I TRAVEL 1 HOUR ONE DAILY TO WORK. IT COULD HAVE CAUSED A POTENTIAL ACCIDENT IF IT HADN'T BEEN DIAGNOSED IN TIME. IT HAS BEEN SINCE THEN REPAIRED.
IMPROPER DRAINING ROUTE WHICH IN RESULT CAUSES MOLD AND DAMAGE TO FLOOR MATS AND SEAT CUSHIONS IN RAINY WEATHER. TRANSMISSION FLUID HAS HIGHER ACIDITY LEVELS. COOLANT REGULARLY FALLS BELOW MINIMUM LEVEL REQUIRED.
TL* THE CONTACT OWNS A 2009 VOLVO S40. WHILE DRIVING APPROXIMATELY 25 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED, BUT THE VEHICLE FAILED TO ACCELERATE. THE VEHICLE INDEPENDENTLY DECELERATED AND STALLED. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS DIAGNOSED THAT THE TRANSMISSION FUEL LINE WAS FRACTURED. THE TRANSMISSION FUEL LINE AND THE TRANSMISSION FLUID WERE REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 65,000.
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