The Check Engine Light may illuminate because of a failed knock sensor. Although the sensor often tests okay, it can fail intermittently, while the vehicle is being driven.
Resources for the Repair and Maintenance of your 2003 Subaru Impreza
2003 Subaru Impreza
2003 Subaru Impreza Problems
Sometimes the Check Engine Light illuminates because the computer detects misfires. Subaru released an improved spark plug wire set to solve the problem. The ignition coil should also be inspected for carbon tracks or short circuits between the contacts
Front engine oil leaks can develop from the camshaft seal and the crankshaft front seal. If one or more seals require replacement, it may be wise to consider replacing the timing belt as well. These seals are commonly inspected and replaced as needed as part of a timing belt service.
The head gasket has a high failure rate due to cooling system problems. Subaru is aware of the problem and has extended the warranty to 8 years/100k miles on many vehicles.
The leak may develop from the oil pump seal. Our technicians prefer to use thread locker when replacing the seal to prevent the bolts from becoming loose again.
2003 Subaru Impreza Recalls (Recent)
Summary: SUBARU IS RECALLING 36,791 MY 2002-2003 IMPREZA WAGONS. THE STUD BOLT(S) OF REAR GATE STAY MAY HAVE BEEN TIGHTENED WITH INSUFFICIENT TIGHTENING TORQUE AND A GAP MAY HAVE RESULTED BETWEEN THE REAR GATE PANEL AND STUD BOLT BASE. AFTER REPEATED REAR GATE OPERATIONS (OPENING AND CLOSING), THE REAR GATE INNER PANEL AT THE WELDING NUT MAY BREAK, WHICH WILL LEAD TO DETACHMENT OF THE REAR GATE STAY, AND THE REAR GATE DROPPING DOWN.Learn more »
Summary: ON CERTAIN SEDAN AND WAGON MODEL VEHICLES, THE LEFT FRONT BOLT THAT RETAINS THE FORWARD PART OF THE DRIVER'S SEAT TO THE SEAT SLIDE RAIL MAY LOOSEN. IF THE SEAT SLIDE RAIL BOLT LOOSENS, IT WILL EVENTUALLY FALL OUT, AND THE SEAT MAY SEPARATE FROM THE SEAT SLIDE.Learn more »
RepairPal Expert Overview:
The transmission park mechanism located inside the automatic transmission may not hold when the selector is in the "park" position. The vehicle could move/roll without warning, increasing the risk of a crash. Dealers will replace the automatic transmission parking rod assembly to correct this concern.
Summary: ON CERTAIN PASSENGER SEDANS, WAGONS, AND SPORT UTILITY VEHICLES, THE CRUISE CONTROL CABLE COULD COME OUT OF ITS TRACK ON THE CRUISE CONTROL LEVER AND LODGE ON THE CONTROL LEVER TAB WHEN THE ACCELERATOR PEDAL IS RELEASED. IF THIS CONDITION OCCURS, THE THROTTLE WILL NOT RETURN TO THE IDLE POSITION AND WILL REMAIN IN AN OPEN POSITION.Learn more »
Summary: SUBARU IS RECALLING CERTAIN MODEL YEAR 2002 AND 2003 IMPREZA WRX VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF SOUTH DAKOTA, NEBRASKA, NORTH DAKOTA, MINNESOTA, IDAHO, IOWA, MONTANA, COLORADO, WISCONSIN, NEW YORK, WYOMING, MICHIGAN, ALASKA, NEW HAMPSHIRE, VERMONT, AND MAINE. DURING COLD STARTS, TYPICALLY UNDER EXTREMELY COLD TEMPERATURES, FUEL LEAKS IN THE FUEL DELIVERY LINE COULD OCCUR WHERE THE LINE CONNECTS WITH A RUBBER HOSE.Learn more »
2003 Subaru Impreza Questions and Answers
how can i install my front plate without drilling holes in my bumper?
i replaced my oil temp sencor (drain plug) and guage is still not accurate. what should i look for to resolve this matter?
I have confirmed that I have an oil leak on the left head gasket (and smaller leak on the right side). There are 87,000 miles on the car. Does it make sense to get the timing belt + pump replaced n...