Electrical: navigational system(global positioning system)
Risk. AN OVERHEATED BATTERY COULD LEAD TO A FIRE.
NHTSA has logged 48 owner complaints about the 2004 Volvo S40, most often about the electrical system. It is covered by 6 safety recalls.

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through November 8, 2020. Updated daily. Photo: IFCAR, Public domain.
48 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Electrical system | 11 | 1 |
| Air bags | 11 | 3 |
| Service brakes, hydraulic | 8 | 1 |
| Fuel system, gasoline | 5 | 0 |
| Engine and engine cooling | 5 | 0 |
| Steering | 4 | 0 |
| Vehicle speed control | 4 | 1 |
| Service brakes | 3 | 1 |
| Visibility | 2 | 0 |
| 12 other systems | 17 | 2 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
Risk. AN OVERHEATED BATTERY COULD LEAD TO A FIRE.
Risk. IF THIS OCCURS, THE CHECK ENGINE LIGHT MAY ILLUMINATE.
Risk. THIS MAY POTENTIALLY RESULT IN FUEL LINE LEAKAGE.
Risk. IF THIS OCCURS, MORE BRAKE PEDAL FORCE MAY BE REQUIRED TO STOP THE VEHICLE AND/OR MAY EXPERIENCE A ROUGH ENGINE IDLE, WHICH COULD RESULT IN A CRASH.
Risk. FUEL LEAKAGE IN THE PRESENCE OF AN IGNITION SOURCE COULD RESULT IN A FIRE.
Risk. THIS DOES NOT MEET THE REQUIREMENTS OF THE STANDARD.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Volvo.
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the S40 median. How we score
2004 Volvo S40 4-DR. w/SAB (2004.5) in NHTSA's New Car Assessment Program. Photos are from NHTSA's crash tests.

Recent electrical system complaints filed with NHTSA, shortened. Personal details are removed.
HAVING A COOLANT LEAKAGE, CRASH MODE AND SAFETY ALARM SYSTEM CHECK KEEPS COMING ON...WHEN CRASH MODE COMES ON...CAR JUST SHUTS OFF.
THE KEY DOES NOT TURN ALL THE WAY TO TURN THE IGNITION - IT'S LOCKED AFTER TURNING I AND II (NOT TO III). I HAD TO HAVE THE CAR TOWED. I COULD HAVE BEEN STRANDED IN AN UNSAFE AREA. I CALLED VOLVO CUSTOMER SERVICE, BUT I WAS TOLD IT'S NOT UNDER WARRANTY ANYMORE. I WENT TO YOUTUBE AS TO HOW I COULD…
MY VEHICLE DOORS LOCK UP AND CAN'T BE UNLOCKED DUE TO FAULTY LOCKS. NO WAY TO GET DOOR OR DOORS TO UNLOCK. WHICH CAN CAUSE DEATH IF INVOLVED IN A ROLL OVER, SUBMERGED, OR ANY MAJOR ACCIDENTS. IT CAN BE ANY DOOR ON THE VEHICLE. ON MINE IT'S MY REAR PASSENGER DOOR WHICH MY CHILD SITS NEXT TOO IN HER…
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.