Brought 2013 Wrangler to dealer for constant P0304 code after replacing ignition coils and spark plugs. Dealer did a compression leak test to verify that the 4th cylinder head was bad and need replacing and will cost $3700 for the repair. I had asked about the service bulletin 09-002-14 and my vehicle is not covered under the X56 code extended warranty for the cylinder head. I called Chrysler/Jeep as recommended by the dealer, and they told me to call the dmv.

- Simsbury, CT, USA

I was in motion on highway at 60mph dash lights and radio went off, the engine went off for about 3 seconds then everything came back to normal. This occurred 3 times in the next 10 minutes. Each occurance was the same. Ran fine after that for 30 mins. Has not reoccured. Total shut down is dangerous. I have heard reports of this happening to many Jeep.

- Buena, NJ, USA

Engine oil cooler has failed 2 times once at around 70K miles and again at 90K miles. Oil leaks on top of engine block and runs down the back to the transmission on to the exhaust and could easily cause a fire. Fiat does not care when I reported it and it is a very common problem with the engine in multiple vehicles. Dealer wanted $3,000 to replace it when the problem was 12 dollar O rings on the adapter. The plastic housing that sits on top of a hot engine flexes and allows the O rings to leak. There has to be a way to replace that part with something safer but they wont cause it would cost them to much money and good luck proving what happened to start the fire when the plastic housing just burns away in a fire or your engine blows to low oil.

- Luttrell, TN, USA

When the Jeep is put into reverse first thing after sitting for a while the vehicle stalls when the brake pedal is applied. If the break pedal is slowly released, the Jeep will stutter and almost stall but stays running.

- Gahanna, OH, USA

At low speeds, usually while braking, the Jeep will lurch forward/accelerate.

- Watkins Glen, NY, USA

The contact owns a 2016 Jeep Wrangler. The contact stated that after taking the vehicle to an independent mechanic for a tire change, the vehicle failed to restart. The battery was replaced however, the failure persisted. The vehicle remained in custody of the independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 75,500. The VIN was not available.

- Nevassa, NC, USA

Jeep has developed a ticking noise that has become louder and louder, noise is present whether vehicle is stationary or in movement and increases with the speed of the vehicle. Mechanic advised that it is faulty rockers and that they need to be replaced. He also acknowledged this is an extremely common problem with all penstar 3.6L in all Chrysler products.

- Newnan, GA, USA

My 2013 Jeep Wrangler started having a code that read "misfire on cylinder 6" at about 55,000 miles. After changing the spark plugs and ignition coils on the drivers side bank of cylinders (2,4, and 6) the trouble code still continued to pop up about every week or two. I then took it to my local Jeep, Chrysler, Ram dealer to investigate further. After doing some research I found out that the cylinder heads on the pentastar engine in the 2012 and 2013 Jeep Wrangler were have many, many issues with the bad cylinder heads because of there was two different metals used between the engine block and the cylinder head causing it to warp and cause compression issues in the cylinder. Jeep was well aware of this problem but refused to this day to issue a recall. After the dealer took the engine apart to investigate, he admitted to the fact that it was a bad cylinder head. This misfire on cylinder 6 occurred mostly when idling at a traffic light or at very low speeds. The kicker in all of this even though Jeep admitted a faulty cylinder head was the cause of the loss of compression, they refused to replace the cylinder head at their cost. Because Jeep did not have my VIN number in their list to be repaired, it was up to me to pick up the cost. I did nothing in the time that I have had this vehicle (original owner) to make a cylinder head become warped. This was a problem with the pentastar engine from the beginning. Too bad Jeep doesn't do the right thing and repair these pentastar engine issues at their expense rather than heaping more responsibility on the consumer.

- Toledo, OH, USA

My Jeep shuts off while driving on city roads and going up hills with other vehicles present, no codes show up, dash lights turn red when vehicle is off, my Jeep makes funny noises when turned off, take it to the dealership over 3 months since I bought it 3 months ago and they can't fix it. They don't know what is wrong with it. They've tired everything and still nothing. It's going back in again because it shut off on me going up a hill. This Jeep is now becoming dangerous to myself. Yet the Jeep still isn't giving codes. I had to go buy a car scan device plug it in and record data of what is going on with the Jeep so that the dealership can see. Do I have to go off a cliff or get into a really bad accident before this problem is found or fixed. I've only had this vehicle for 3 months. I bought it on February 21,2020 and it started acting up on February 28,2020 and still is on May 16, 2020 and it is becoming a nightmare. I'm spending money to get it fixed because the dealership is charging me because my extended warranty doesn't cover it. I was told when I bought it that there was nothing wrong with it but that was a lie. I need help figure this out. The dealership didn't make sure that this vehicle was safely operational before selling it. It over heated because they didn't check fluid. My heated seats were burnt out. My dash lights flicker on and off. They replaced something behind my dash but it didn't fix the issue. I think it made it worse. As of right now my Jeep shuts up at least once a week which puts me in a dangerous position because I get stuck either on the side of the road sitting sideways or almost off of a cliff or in the middle of the road with nowhere to go because I have no power steering the Jeep does it start back up for anywhere between 5 to 15 minutes.

- Spokane, WA, USA

The contact owns a 2013 Jeep Wrangler. The contact stated that while driving approximately 65 mph, when the check engine warning light illuminated and the vehicle decelerated to 20 mph and loss motive power. The vehicle was taken to the local pepboys to be diagnosed. The contact was informed of a misfire on cylinder number 6. the contact was informed that similar vehicles were included in a manufacturer communications number: 10139897 (engine and engine cooling) warranty however, the VIN was not included. Five star Chrysler Dodge Jeep Ram of macon located at (3068 riverside dr, macon, ga 31210, (478)345-8899) confirmed that the VIN was not included in the warranty coverage. The manufacturer was not made aware of the issue. The approximate failure mileage was 98,000.

- Juliet, GA, USA

Vehicle has just over 65K miles on it and has been maintained properly with regular oil changes. Ticking noise on the passenger side of the engine. Turned out the lifters and cam shaft had failed. Replaced by dealer at a total cost of just over $2400. Based on numerous Jeep forum visits and research, this is a part defect in the cam lifter and is epidemic. Fca is requiring owners to pay for their poor quality parts being installed in their 3.6L pentastar engines. Have fca issue a recall and reimburse those that have been charged to replace their faulty parts.

- Houston, TX, USA

I went to have the oil changed and the technician found tsb 09-009-18 pressure relief valve had broken and all of the pieces were missing but two small plastic parts. They showed me the tsb and I was unable to drive the Jeep until the oil filer adapter was replaced or the plastic parts could possibly migrate and blow up my engine.

- Apache Jct, AZ, USA

The oil filter housing/cooling assembly is plastic, cheap, and located right in the middle of the engine. Mine, along with many other Jeep of this make and model have them fail well under 30,000 miles. This causes massive engine oil loss which in turn causes engine damage. This is a huge rip off considering the part costs ~$500. Chrysler should fix this immediately on all Jeep.

- Wahiawa, HI, USA

The contact owns a 2013 Jeep Wrangler. The contact stated that while driving at various speeds, the vehicle would hesitate as the check engine light would illuminate. The contact took the vehicle to an independent mechanic for a tune up and the vehicle began to operate normally. Despite the repair, the failure continued to reoccur, the most recent time the contact took the vehicle to another independent mechanic where they stated that the cylinder assist had misfired. The contact was also informed that there was a recall for the air bag and that there had been a recall placed on the vehicle for her failure. The vehicle was serviced at five star Chrysler Dodge Jeep Ram of macon 3068 riverside dr, macon, ga 31210 where they informed her that the only recall on the vehicle was for the air bag. The vehicle had not been repaired. The failure mileage was 99,457.

- Juliette, GA, USA

The contact owns a 2013 Jeep Wrangler. The contact stated that the vehicle misfired with the check engine warning light illuminated. The vehicle was taken to vann underwood Chrysler Jeep Dodge Ram dealer, (501 S madison St, whiteville, nc 28472, (910) 642-2000) and was diagnosed that the cylinder head number 2 misfired and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to NHTSA. The failure mileage was approximately 98,000.

- Bladenboro, NC, USA

The contact owns a 2013 Jeep Wrangler. The contact stated that the low oil warming light illuminated. The contact stated that when examining the vehicle they noticed that there was an excessive amount of oil all over the motor. The contact took the vehicle to a certified mechanic who diagnosed that there was a fracture oil filter housing and that it needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure and referred the contact to NHTSA to file a complaint. The approximate failure mileage was 105,000.

- Scarsdale, NY, USA

Failure of oil cooler housing, noticed oil burning smell looked under the Jeep and saw oil everywhere

- Attleboro, MA, USA

As I research what is wrong with my Jeep it has been a happening for quite a bit of people. Nobody has been able to find a solution for this issue, what has been happening is when driving my 2013 Jeep Wrangler at all my check engine light comes on and I instantly lose power plus my ABS and traction control lights turn on and I end up going into limp mode. It mostly happening on the freeway and going up hills, but has also been happening even when it is in park. My Jeep has been in the shop with a trusted mechanic for 3 months and he has not been able to find the issue either. All of the research I have done tons of people has been having this issue but seems as though no one can find the cause of the problem either... I'm unsure of what to do now.

- Draper, UT, USA

All power was lost while driving down the freeway at 65 mph. Lost power steering and the engine died. There was no warning that there was a problem. This could have been a serious accident. Found other instances of this happening on the internet:

- Westminster, CO, USA

The 3.6 engine has developed a tick from inad rocker arms. The arms are known to be faulty and many vehicles have stalled at high speeds due to the issue. This is a huge safety issue that needs to be recalled

- Evergreen, CO, USA