2012 Jeep Wrangler Service and Repair Manual

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Factory-Grade Data

2012 Jeep Wrangler service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Rubicon Sport Utility 2-Door
  • Unlimited Rubicon Sport Utility 4-Door
  • Unlimited Sahara Sport Utility 4-Door
  • Unlimited Altitude Sport Utility 4-Door
  • Sport Sport Utility 2-Door
  • Sahara Sport Utility 2-Door
  • Unlimited Mountain Sport Utility 4-Door
  • Unlimited Sport Sport Utility 4-Door
  • Unlimited Sport Utility 4-Door

Engines covered

  • 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2012 Jeep Wrangler Recalls & Complaints

NHTSA #19V68000026/09/2019Component: SEAT BELTS:FRONT:ANCHORAGE

Chrysler (FCA US LLC) is recalling certain 2011-2018 Jeep Wrangler right hand drive vehicles. The driver's seat belt buckle mounting strap may fracture and separate from the seat frame.

Consequence

A separated or severed seat belt buckle strap will result in an inoperable seat belt, increasing the

Remedy

FCA US will notify owners, and dealers will replace the driver's seat belt buckle, free of charge.

NHTSA #13E01000025/02/2013Component: EQUIPMENT

Quadratec, Inc. is recalling certain aftermarket accessory, driver-side, Ultimate Floor Liners part numbers 14254.0301 07, 14254.0301 08, 14254.0301Q, 14254.0302 07, 14254.0302 08, 14254.0302Q, 14254.

Consequence

If the liner shifts forward it may impede the operation of the accelerator and possibly lead to unin

Remedy

Quadratec will notify owners and either exchange the liners or provide them with a hook guard kit to

NHTSA #16V35200024/05/2016Component: AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Chrysler (FCA US LLC) expanded the affected population to include 73,712 2005-2009 RAM 2500 trucks produced at the St. Louis North Assembly Plant. With this change, Chrysler is recalling certain mode

Consequence

These vehicles are equipped with certain air bag inflators assembled as part of the passenger fronta

Remedy

Owners are advised not to drive their vehicle until the recall repair is complete. Chrysler will no

NHTSA #16V28800011/05/2016Component: AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

Chrysler (FCA US LLC) is recalling certain model year 2011-2016 Right Hand Drive Jeep Wrangler vehicles manufactured February 16, 2010, to May 2, 2016. The clockspring assembly may become contaminated

Consequence

Failure of the air bag circuit may prevent the driver's frontal air bag from deploying in the event

Remedy

Chrysler will notify owners, and dealers will replace the clockspring, wheel back cover, and column

NHTSA #13V17600007/05/2013Component: AIR BAGS

Chrysler Group LLC (Chrysler) is recalling certain model year 2008-2012 Jeep Wrangler right-hand drive vehicles manufactured February 1, 2007, through October 10, 2011. The affected vehicles have air

Consequence

In the event of a crash necessitating airbag deployment, a broken electrical circuit in the airbag c

Remedy

Chrysler will notify owners, and dealers will replace the clockspring and add a steering wheel dust

NHTSA #13V23400004/06/2013Component: STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS

Chrysler Group LLC (Chrysler) is recalling certain model year 2012-2013 Jeep Wrangler vehicles equipped with a 3.6L engine and an automatic transmission and manufactured January 23, 2011, through Febr

Consequence

A loss of transmission fluid may result in a loss of transmission function which may increase the ri

Remedy

Chrysler will notify owners, and dealers will replace the power steering return tube assembly, free

NHTSA #11V52800002/11/2011Component: AIR BAGS:FRONTAL

CHRYSLER IS RECALLING CERTAIN MODEL YEAR 2008-2012 RIGHT HAND DRIVE (RHD) JEEP WRANGLER VEHICLES MANUFACTURED FROM FEBRUARY 1, 2007, THROUGH OCTOBER 10, 2011. SOME VEHICLES MAY BE EQUIPPED WITH DRIVE

Consequence

A BROKEN ELECTRICAL CIRCUIT IN THE AIRBAG CLOCKSPRING WIRING ASSEMBLY CAN LEAD TO NON-DEPLOYMENT OF

Remedy

CHRYSLER WILL NOTIFY OWNERS AND REMEDY THE VEHICLES AS NECESSARY FREE OF CHARGE. CHRYSLER WILL MAIL

TSB #11023612

SWITCH - CLUTCH STARTER INTERLOCK & MASTER CYLINDER ASSEMBLY - CLUTCH

TSB #11022027

Verify Reman part number availability. Order the "R" part number for all orders: Warranty, Mopar, customer pay and service contract. Order "68" part number for New unsold units only.

TSB #11022026

Verify Reman part number availability. Order the "R" part number for all orders: Warranty, Mopar, customer pay and service contract. Order "68" part number for New unsold units only.

TSB #11017445

ACTUATOR - A/C AND HEATER

TSB #11017435

ACTUATOR - A/C AND HEATER

TSB #11010205

Plate - Planetary

TSB #11008246

BOW - FOLDING TOP

TSB #10248509

Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing t

Showing the 8 most recent of 244 technical service bulletins on file with NHTSA.

20150531Component: SEAT BELTSCrash reported2 injured2 fatalities

2012 JEEP WRANGLER WAS A "POSTAL VEHICLE", IN THAT THE STEERING WHEEL WAS ON THE RIGHT-HAND SIDE OF THE VEHICLE. DRIVER ERROR OCCURRED, IN THAT DRIVER WAS ON RIGHT SHOULDER OF TWO LANE HIGHWAY, BUT P

20150531Component: STEERINGCrash reported2 injured2 fatalities

2012 JEEP WRANGLER WAS A "POSTAL VEHICLE", IN THAT THE STEERING WHEEL WAS ON THE RIGHT-HAND SIDE OF THE VEHICLE. DRIVER ERROR OCCURRED, IN THAT DRIVER WAS ON RIGHT SHOULDER OF TWO LANE HIGHWAY, BUT P

20150531Component: STRUCTURE:BODYCrash reported2 injured2 fatalities

2012 JEEP WRANGLER WAS A "POSTAL VEHICLE", IN THAT THE STEERING WHEEL WAS ON THE RIGHT-HAND SIDE OF THE VEHICLE. DRIVER ERROR OCCURRED, IN THAT DRIVER WAS ON RIGHT SHOULDER OF TWO LANE HIGHWAY, BUT P

20221226Component: AIR BAGSCrash reported2 injured

Front-end crash resulted in airbags busting instead of inflating. Current back and neck injuries.

20170125Component: FUEL/PROPULSION SYSTEMCrash reported2 injured

WHILE TURNING TO PARK THE ENGINE THROTTLE SUDDENLY ACCELERATED & JEEP JUMPED THE CURB, CRASHED THRU A FENCE & ENDED UP IN THE OCEAN. WE WERE RESCUED BY DANA POINT HARBOR PATROL.

Showing the 5 most serious of 1282 complaints filed with NHTSA.

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