The 2003 Jeep Wrangler came with two engines — the 2.4L I4 and the 4.0L I6 — across six trims. This factory service and repair manual is matched to this exact year, so the specifications and sequences are correct for your engine and trim.
Engines
- 2.4L I4 (148 cu in), DOHC
- 4.0L I6 (242 cu in), OHV
Trims
- Rubicon
- SE
- Sahara
- Sport
- X
- X AT
Known issues on the 2003 Wrangler. Three recalls are on federal record for this model year: a hydraulic brake-system fluid loss that decreases brake line pressure and increases stopping distance, an equipment defect that could cause injury by striking persons outside the vehicle, and a fuel-system leak that could result in a fire in the presence of an ignition source. Owners have filed 130 complaints and Jeep has issued 40 technical service bulletins for the year. This manual carries the factory diagnostic and repair procedures behind each of those systems.
From a routine service interval to a hard-to-trace wiring fault, it keeps you on the OEM procedure and the correct specification for your specific 2003 Wrangler.
CERTAIN AFTERMARKET BRAKE HYDRAULIC MASTER CYLINDERS SOLD AS REPLACEMENT BRAKE CYLINDERS FOR CERTAIN FORD, DAIMLERCHRYSLER, AND JEEP PASSENGER VEHICLES. THESE BRAKE CYLINDERS WERE SOLD UNDER THE BRAN
LOSS OF BRAKE FLUID CAN LEAD TO A DECREASE IN BRAKE LINE PRESSURE AND AN INCREASE IN STOPPING DISTAN
AFFINIA (BRAKE PARTS, INC.) WILL REPLACE THE SUBJECT BRAKE HYDRAULIC MASTER CYLINDERS FREE OF CHARGE
BESTOP AFTERMARKET REAR SHELL ROOF RACKS,MANUFACTURED BETWEEN APRIL 27 AND MAY 20, 2004, DESIGNED FOR USE WITH THE BESTOP HARDTOP MADE FOR THE 1986-1995 AND 1997-2003 JEEP WRANGLER. THE COCKPIT COVE
SHOULD THIS OCCUR, THE COCKPIT COULD CAUSE INJURY BY STRIKING PERSONS OUTSIDE THE VEHICLE OR COULD B
BESTOP WILL NOTIFY ITS CUSTOMERS AND PROVIDE A REPAIR KIT AND INSTALLATION INSTRUCTIONS FREE OF CHAR
CERTAIN AFTERMARKET AIRTEX ELECTRIC FUEL PUMPS INSTALLED FOR USE AS REPLACEMENT EQUIPMENT FOR CERTAIN 1997-2004 JEEP WRANGLER; 1997-2001 JEEP CHEROKEE; 1997-2004 JEEP GRAND CHEROKEE; AND 2000-2003 DOD
IN THE PRESENCE OF AN IGNITION SOURCE, A FUEL LEAK COULD RESULT IN A FIRE.
AIRTEX WILL NOTIFY ITS CUSTOMERS AND WILL REPLACE THE AFFECTED FUEL PUMPS FREE OF CHARGE. THE RECAL
Plate - Planetary
KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicl
Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes P0407 ? EGR Sensor B Circuit Low, or P0408 ? EGR Sensor B Circuit High Set
KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicl
Valve Body. These may cause over drive cycling.
Charging System, Battery Diagnostic Tools and Warranty This information only bulletin discusses using the correct test equipment for testing batteries and charging systems, and also warranty reimbursement when battery replacements are neces
Disinfectant Solution Recommended for COVID-19
DIPAP Requirements - Addition of Jeep Wrangler (JL/JK) and Jeep Gladiator (JT) Hard Top and Targa Top Panel Replacements - All Dealers (Rev. A)
Showing the 8 most recent of 40 technical service bulletins on file with NHTSA.
THE ROAD CONDITIONS WERE BAD. WHILE CONSUMER WAS TRAVELING AT 35 MPH ANOTHER VEHICLE TURNED INTO THE CONSUMER'S VEHICLE, CAUSING THE VEHICLE TO COLLIDE HEAD ON. UPON IMPACT,THE AIR BAGS DID NOT DEPLO
THE JEEP WAS INVOLVED IN A WRECK - HIT A POWER POLE AT AROUND 50 MPH KNOCKED IT DOWN AND THE FLIPPED THE AIR BAGS NEVER DEPLOYED - THE POLICE OFFICER WHO WORKED THE WRECK SAID THE AIRBAGS SHOULD HAVE
BALL JOINT CRACKED WHILE MAKING A LEFT TURN ONTO A HEAVY TRAFFIC INTERSECTION,AT LOW SPEED. VEHICLE WHEN OUT OF CONTROL SPINNING SEVERAL TIMES BEFORE HITTING MEDIUM. *JB
WAS DRIVING 20 MPH CONSUMER'S VEHICLE WAS HIT BY ANOTHER VEHICLE THAT WAS BACKING OUT OF A GARAGE. UPON IMPACT, FRONTAL AIR BAGS FAILED TO DEPLOY. DRIVER SUSTAINED INJURIES, AND HAD EMERGENCY ROOM TR
GEN III BUCKLE ON 2003 JEEP WRANGLER RELEASED DURING ROLLOVER ACCIDENT, LEADING TO EJECTION AND DEATH OF DR. ZICKEFOOSE. *AK
Showing the 5 most serious of 130 complaints filed with NHTSA.
