Jeep›Liberty›2003›3.7L/jeep/liberty/2003/3-7l/

KJ platform

2003 Jeep Liberty — 3.7L

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 Liberty 3.7L.

Body SUVEngine 3.7LTransmission Automatic 4-spd

The 2003 Jeep Liberty 3.7L is a compact SUV built on the KJ platform and powered by its 3.7L engine, which requires 5 quarts of 5W‑30 API oil with filter. It mates that engine to a four‑speed automatic transmission and carries EPA fuel‑economy ratings of 15 mpg city, 20 mpg highway and 17 mpg combined. Owner‑reported data show 1,349 complaints for the 2003 model year, with suspension issues leading the list and 13 recalls issued, placing it above the 2000 low of six complaints but below the 2002 peak of 1,807. This positions the 2003 Liberty in the middle of the model’s complaint spectrum, indicating average reliability for the generation.

Model year2012 2011 2010 2009 2008 2007 2006 2005 2003

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5 qt w/ filterOEM · verified

Engine oil type5W-30 APIOEM · verified

Lug nut torque85-110 ft-lbsOEM · verified

EPA fuel economy15/20/17 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 34 · 600 CCA battery, OE oil filter 04781452BF. Note the factory fuel filter and serpentine belt are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 34 · 600 CCAOEM · verified

Tire sizeP235-70R16OEM · verified

Wheel / rim7 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	04781452BF alt 04105409AE
Engine air filter	05018777AC alt 05019443AA
Fuel filter	52100402AH discontinued
Spark plug	SPZFR6F11G alt 68307021AA
Battery	BB34F101AA
Front wiper blades	05066974AA alt 05066973AC
Serpentine belt	05135745AA discontinued · alt 05281351AC
Thermostat	68174083AA alt 53010552AC

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic 4-spd

Dimensions & weight NHTSA vPIC

Overall length	166.1 in
Overall width	71.7 in
Overall height	70.5 in
Wheelbase	104.3 in
Curb weight	4043 lb
Track (front / rear)	60.2 / 59.8 in
Weight distribution (front / rear)	55/45

Ratings & economy EPA / vPIC

EPA city / highway / combined	15 / 20 / 17 mpg
Drivetrain	Rear-Wheel Drive
Recommended fuel	Regular Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

No 2003 road test on record; the results below are same-engine tests from nearby model years, each shown under its own year.

8.8–10.0 sec0–60 mph (tested)quickest 8.80 sec — 2002 Limited Edition

210 hpHorsepower (as tested)

235 lb-ftTorque (as tested)

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2002	Limited Edition 3.7L V6	8.80 sec	16.70 sec	210 hp	4x4
2002	Limited Edition 3.7L V6	10.00 sec	17.50 sec	210 hp	4x4
2004	Limited 3.7L V6	9.60 sec	16.89 sec	210 hp	4x4
2006	Renegade 3.7L V6	9.40 sec	16.90 sec	210 hp	4x4

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5 qt w/ filter of 5W-30 API engine oil, Front: 80W-; Rear: 198RB in the differential, DOT 3 brake fluid. Torque lug nuts to 85-110 ft-lbs, the oil drain plug to 25.0 ft-lbs. The firing order is 1-6-5-4-3-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Brake Fluid	DOT 3
Differential Gear Oil	Front: 80W-; Rear: 198RB
Differential Gear Oil Capacity	2.6 Pints mvc Front
Differential Gear Oil	Front: 80W-; Rear: 198RB
Differential Gear Oil Capacity	3.8 Pints
Engine Coolant	HOAT · MS9769
Engine Oil	5W-30 · API
Engine Oil Capacity	5 qt w/ filter

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	8.3 ft-lbs
Crankshaft Pulley and/or Damper Bolts	130 ft-lbs
Engine Flywheel Bolts	70 ft-lbs
Intake Manifold to Engine Bolts	8.8 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18 ft-lbs
Engine Oil Pan Drain Plug	25.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs	21 ft-lbs

Chassis torques

Lug Nuts	85-110 ft-lbs
Front Wheel Hub	100 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-6-5-4-3-2
Ignition Coil Primary Resistance	.60-.90 ohms
Ignition Coil Secondary Resistance	6000-9000 ohms
Spark Plug Manufacturer	Champion
Spark Plug Gap	0.042 in
Spark Plug Torque	11.0 ft-lbs
Ignition Timing	TDC, Not adjustable degrees

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.63 lbs
Oil Group	PAG
Oil Type	SP-15
Oil Capacity	8.00 oz
Standard BCI Group Number	34
Standard BCI Cranking Performance	600 cca

Service checks

Pressure Test	16 psi
Radiator Cap Pressure Relief	18-21 psi
Thermostat Opening Temperature	195 °F
Regulated Fuel System Pressure (With Vacuum)	47-51 psi
Engine Compression	170-225 PSI. 25 Maximum variation PSI.
Engine Oil Pressure	25-110 psi
Engine Oil Pressure RPM	3000 rpm
Intake Valve Lash	Hydraulic in

Brakes

Torque Caliper to Bracket	11 ft-lbs / 18 ft-lbs
Minimum Pad Thickness	0.030 in
Minimum Shoe Thickness	0.030
Rotor Max Parallel Variation	0.0006 in / 0.0007 in
Rotor Runout Limit	0.004 in
Rotor Nominal Thickness From	1.102 in / 0.472 in
Rotor Nominal Thickness To	1.102 in / 0.472 in
Rotor Minimum Machining	1.024 in / 0.433 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

20 ft. lbs., Step 2: 90

20 ft. lbs

Cylinder Head — tightening sequence 4 stages

Prep Lubricate bolt threads with clean engine oil · M8 bolts 9-12, coat bolt heads with lock and seal adhesive

1	bolts 1-8	20 ft. lbs
2	bolts 1-8	20 ft. lbs
2	bolts 9-12	10 ft. lbs
3	bolts 1-8	90 degrees
4	bolts 1-8	90 degrees
4	bolts 9-12	19 ft. lbs

Main Bearings — tightening sequence 5 stages

Prep Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Torque the bolts in the sequence shown.

1	Hand tighten bolts 1D, 1G and 1F until the bedplate contacts the block.
2	Tighten bolts 1A - 1J to 40 ft. lbs.	40 ft. lbs
3	Tighten bolts 1 - 8 to 5 ft. lbs.	5 ft. lbs
4	Turn bolts 1 - 8 an additional 90 degrees.	90 degrees
5	Tighten bolts A - E 20 to 20 ft. lbs.	20 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 6,000 mi; spark plugs every 30,000 mi; coolant every 6,000 mi. The big-interval services (every 6,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 6,000 mi	Brake Line (inspect) · Engine Coolant System Hoses (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Exhaust System (Complete) (inspect) · Tire & Wheel Assembly (rotate)
Every 15,000 mi	Suspension Ball Joint (inspect)
Every 18,000 mi	Brake Linings (inspect)
Every 30,000 mi	Engine Air Filter Element (replace) · Spark Plugs (inspect) · Spark Plugs (replace)
At 60,000 mi	Spark Plugs (inspect)
Every 60,000 mi	Accessory Drive Belt (inspect) · PCV Valve (inspect)
At 102,000 mi	Engine Coolant System (drain, flush & refill) · Transmission Filter (replace) · Transmission Fluid & Filter (replace)

Owner how-tos

Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.

Common procedures

Key fob — remote (RKE) programming programming new fob buttons Dealer tool OEM · verified

Tool required	DRBIII scan tool (dealer / locksmith)
Why	Transmitter codes are written into the receiver in the passenger door module

Anti-theft (SKIS) — module initialization after immobilizer module replacement Dealer tool OEM · verified

When needed	After Sentry Key Immobilizer Module (SKIM) replacement
Tool required	DRBIII scan tool
Also required	The vehicle's four-digit PIN code

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2003 Liberty recorded 1,349 federal complaints, 13 recalls, 9 investigations and 64 TSBs, placing its complaint volume below the 2002 peak of 1,807 but above the 2004 count of 1,100. Recalls in 2003 (13) match the 2002 level and exceed the 2004 figure, indicating continued safety‑related actions in that model year. The complaint concentration in suspension (372), air bags (301) and visibility (71) aligns with the broader pattern of early‑generation Liberty concerns that taper after 2006. Crash‑related complaints (134) and fire‑related complaints (11) are modest compared with the overall complaint count but reflect specific incident reports. Overall, the data show that 2003 sits in a high‑complaint window but with slightly fewer issues than the 2002 peak and before the sharp decline seen from 2007 onward. Consequently, while a 2003 Liberty can be found, prospective buyers should verify recall history and conduct a thorough mechanical inspection before purchase.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

1,349

Owner complaints

134 involved a crash · 11 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’00 ’01 ’02’03’04 ’05 ’06 ’07 ’08 ’09 ’10 ’11 ’12

Owner complaints filed with NHTSA, by component

All 1,349 complaints on record, top 8 components.

Suspension372

Air Bags301

Visibility71

Fuel System, Gasoline,Structure45

Power Train39

Fuel/Propulsion System36

Fuel System, Gasoline29

Electrical System26

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 13 campaigns on record for this vehicle.

15V046000Air Bags:FrontalReported 28/01/2015

Chrysler (FCA US LLC) is recalling certain model year 2002-2003 Jeep Liberty vehicles manufactured January 9, 2001, to March 28, 2003, 2002-2004 Jeep Grand Cherokee vehicles manufactured February 13, 2001, to May 23… Remedy: Chrysler dealers will replace the air bag control module and side impact sensors as required, free of charge. This recall remedy was applied during earlier recall campaigns of…

15V673000Air Bags:Side/WindowReported 19/10/2015

Chrysler (FCA US LLC) is recalling certain model year 2003 Jeep Liberty vehicles manufactured March 29, 2003, to July 3, 2003, and 2004 Jeep Grand Cherokee vehicles manufactured May 27, 2003, to May 20, 2004. Due to… Remedy: Chrysler will notify owners, and dealers will replace the air bag electronic control module and the side impact sensors, as necessary, free of charge. The recall began on May 5…

Technical service bulletins NHTSA · verified

Showing 5 of 64 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
9001784	2021-02-22	Power Train	Mechanical rocker arm, intake, 1.7 ratio.
9001784	2021-02-22	Equipment	Mechanical rocker arm, intake, 1.7 ratio.
9004275	2020-07-22	Electrical System	KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC…
9004275	2020-07-22	Electrical System	KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC…
23-015-20	2020-04-30	Equipment	Disinfectant Solution Recommended for COVID-19

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific Liberty. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 34 battery Vehicles taking 5 qt w/ filter KJ-platform vehicles Engine oil filter 04781452BF Engine air filter 05018777AC Fuel filter 52100402AH Spark plug SPZFR6F11G

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2003 Liberty 3.7L take?

5 qt w/ filter of 5W-30 API, per the factory manual.

Does the 2003 Liberty have open recalls?

NHTSA lists 13 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 3.7L get?

EPA figures are 15 city / 20 highway / 17 combined mpg.