2012 Jeep Wrangler Unlimited — Full Specifications
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The 2012 Jeep Wrangler Unlimited is an SUV powered by a 3.6L 6-cyl regular gasoline engine. It returns around 22 mpg (UK) / 18 mpg (US EPA) combined. Owners often keep a Jeep Wrangler Unlimited workshop manual to hand for servicing and repairs.
Related listing: see also the 2012 Jeep Wrangler page for the base Wrangler listing, which may cover additional engines and body styles.
Full Specifications
| Engine | 3.6L 6-cyl |
|---|---|
| Transmission | Automatic 5-spd |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | 4-Wheel Drive |
| Body Style | SUV |
| Fuel Economy (UK) | 22 combined / 19 urban / 24 extra-urban mpg |
| Fuel Economy (US EPA) | 18 combined / 16 city / 20 highway mpg |
| CO₂ Emissions | 307 g/km |
| EPA Est. Annual Fuel Cost | $3,700 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2012 Jeep Wrangler Unlimited, all with the 3.6L 6-cyl engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.6L 6-cyl | Automatic 5-spd | 4-Wheel Drive | 22 | 18 (16/20) | 307 | $3,700 |
| 3.6L 6-cyl | Manual 6-spd | 4-Wheel Drive | 22 | 18 (16/21) | 307 | $3,700 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2012 Jeep Wrangler Unlimited
Running Costs: 2012 Jeep Wrangler Unlimited
Covering around 8,000 miles a year in a 2012 Jeep Wrangler Unlimited at 22 mpg combined, expect roughly 1,653 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,700 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2012 Jeep Wrangler Unlimited Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 10 safety recall campaigns that include the 2012 Jeep Wrangler Unlimited (as of 6 October 2026). Most affected areas: Air bags (6), Seat belts (1), Electrical system (1). 3 campaigns carried a “do not drive” or “park outside” advisory. A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Seat belts — campaign 19V680000, reported 26 September 2019. Risk: A separated or severed seat belt buckle strap will result in an inoperable seat belt, increasing the risk of injury in the event of a crash.
- Air bags — campaign 19V018000, reported 15 January 2019. Risk: In the event of a crash necessitating deployment of the passenger's frontal air bag, the inflator could explode with metal fragments striking the vehicle occupants potentially resulting in serious injury or…
- Air bags — campaign 18V021000, reported 9 January 2018. Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
- Air bags — campaign 16V352000, reported 24 May 2016. Risk: These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. These inflators may rupture due…
Showing the 4 most recent of 10 campaigns.
Owners have filed 833 complaints with NHTSA about the 2012 Jeep Wrangler Unlimited. The most-reported areas are Power train (282), Steering (204), Engine (172). Complaints include 22 reported crashes, 19 reported fires, 22 reported injuries, 2 reported deaths. That is close to the median of 654 complaints across the 9 Jeep Wrangler Unlimited model years in our data.
Used-buyer checklist for the 2012 Jeep Wrangler Unlimited
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Transmission & drivetrain (282 owner complaints) — On the test drive, watch for hesitation, jerking or slipping between gears and ask for transmission service history.
- Steering (1 recall campaign · 204 owner complaints) — Check for play, noise or heavy steering, and ask whether any steering recall work was done.
- Engine (172 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
- Electrical system (1 recall campaign · 147 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Jeep Wrangler Unlimited compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 22 mpg figure is 5 mpg below that average. Its 307 g/km CO₂ figure is 54 g/km higher than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
Jeep models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2012 Jeep Wrangler Unlimited's 22 mpg is 5 mpg below that make average. Its 307 g/km CO₂ figure is 53 g/km higher than the 254 g/km Jeep average.
Of the 9 Jeep Wrangler Unlimited model years we cover, the 2012 ranks 3rd for combined fuel economy on its best configuration (22 mpg UK combined, against a high of 30 mpg). See every Jeep Wrangler Unlimited year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2012 Jeep Wrangler Unlimited
Frequently Asked Questions
What engine does the 2012 Jeep Wrangler Unlimited have?
It's fitted with a 3.6L 6-cyl regular gasoline engine, paired with a automatic 5-spd transmission.
What is the fuel economy of the 2012 Jeep Wrangler Unlimited?
The most efficient configuration returns around 22 mpg (UK) combined, or 18 mpg on the US EPA cycle.
How much does the 2012 Jeep Wrangler Unlimited cost to fuel per year?
The US EPA estimates about $3,700 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2012 Jeep Wrangler Unlimited have any recalls?
NHTSA lists 10 safety recall campaigns that include the 2012 Jeep Wrangler Unlimited (as of 6 October 2026). Most affected areas: Air bags (6), Seat belts (1), Electrical system (1). 3 campaigns carried a “do not drive” or “park outside” advisory. A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2012 Jeep Wrangler Unlimited?
Among the 833 owner complaints filed with NHTSA, the most-reported areas are Power train (282 complaints), Steering (204 complaints), Engine (172 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Jeep Wrangler Unlimited's fuel economy good for an SUV?
It returns around 22 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track.