Under body vibration reported in January with less than 100K miles. Told it was due to the crack in my back bumper. Then 2 days ago, drove the car back to Nissan dealership at 112K miles where they told me my radiator cracked which lead to fluid going into the transmission - a widely known Nissan problem. Will have to replace transmission $5500 + radiator $700 because they are ruined. Fuel sensory gauge stuck also and will have to replace - also a widely known Nissan problem.

- Mooresville, IN, USA

My coolant leak fluid into my transmission, Nissan honored the extended warranty and is replacing the radiator and the transmission. My whole exhaust system needs to be replaced also and my cost for that is 1200.

- Secane, PA, USA

At higher speeds the car started shuddering / jerking when it was trying to up or downshift. At first it was not too noticeable however that changed relatively fast and he jerking was more apparent. After taking it to the dealer it was found to be a known problem with the car. The problem was a crack within the transmission oil cooler in the radiator causing intermixing between the transmission and the coolant. The dealer replaced the radiator and the transmission assembly. Since my vehicle had between 80000 and 90000 miles I was in the $2500 copay range.

- Pittsburgh, PA, USA

Complete loss of power and need to be towed to a dealership, then dealer diagnose, the problem as a failed transmission fluid, cooler located in de radiator assembly that allowed coolant to mix with and contaminate the automatic transmission fluid, resulting in damaged internal transmission components and a damaged internal transmission computer.

- San Antonio, TX, USA

Radiator failed coolant leaked into transmission. Transmission and radiator need to be replaced. Nissan is aware of this problem and never informed me of this issue. If I was made aware of the problem I would have had radiator replaced. There should have been a recall. I am sure more similar situations will continue to occur until there is an official recall. Who loses? the customer. This is unacceptable. Nissan needs to be held responsible.

- Valencia , CA, USA

Radiator failed causing transmission fluid to leak into radiator and vice versa (antifreeze into transmission). Car rumbles really bad and shifts hard. Had to replace radiator and flush transmission so about $600 for a problem that Nissan should fix.

- Chester, VA, USA

I was driving on the highway about 55 to 60 miles per hour and felt an intense vibration causing my car to start shaking as if I were on the rumble strips in the median. I drove the car to a mechanic and was told my radiator had leaked into my transmission destroying the torque converter. Nissan has refused to help me as well as I have been denied by an aftermarket warranty that Nissan persuaded me to purchase.

- Arnold , MD, USA

Started shuttering and not shifting right, found tran fluid in radiator, what's sad is im writing this in vain cause nothing will come of it, its sad that if they're had been more known before hand my wife wouldn't have bought it, instead she has 3.5 more years to pay for something that was intended to last atleast til she got it paid for, but now she is going to have to go to the bank and make another loan, and try to make two payments instead of one, to say the least im not happy with Nissan trying to keep this under the rug with the rest of the dirt.

- Coalmont, TN, USA

The contact owns a 2006 Nissan Pathfinder. The contact stated while driving approximately 30 mph, the transmission began to jerk continuously and the engine stalled without any warning. The vehicle resumed in a jerking motion once restarted. The vehicle was taken to an authorized dealer for diagnosis. The transmission internal seal was faulty. The vehicle was not repaired. The manufacturer was notified of the problem. The approximate failure mileage was 80,000....updated 05/08/13 the consumer stated the vehicle reversed itself when not in reverse gear. The transmission and radiator were replaced. Updated 05/20/2013

- Ambler, PA, USA

I have the 06 Pathfinder, there was a recall that I was not aware of, until I start searching after the car have accelerating issue that almost cause an accident multiple occasions, anyway I went to my dealership and they said Nissan only cover U to 100000 miles. Our is 15000 miles over, the problem was a defected radiator and that leak coolant into the transmission. It would cost us $7600 to repair it, and way over our budget. I start check online and there is a lot of complaints on this issues. Hope my complaints help us and many others that help same misfortune.

- Cypress, TX, USA

I have a Pathfinder 2006 with 110,000 miles on January 9, 2012 I take it to the dealership because it was shaking ones I drove over 60 mph the dealer did a multi- point vehicle inspection and they determined that everything was ok except from the four-wheel-drive chaff joint got excessive play and replace it for new one and yesterday March 7, 2013 I took my Pathfinder 2006 to royal palm Nissan and the service advisor [xxx]estate it that my car radiator is leaking coolant into the transmission and though that I had to replace it for a new ones and is going to cost me $6400 and he states that that's a common issue with the path finders so if it's a common issue and they do an extended warranties wish there are no good to no body how can they spect a costumer to pay 6400 for a part the they should recall I'm sure I'm not along on this issue and just hope the some busy like you guys can make them do the right thing and stand by their products to avoid any accidents with thousands of vehicles on the road thanks so much for reviewing this lines I appreciated and I hope to hear back from you guys thanks ever such lots. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Dunnellon , FL, USA

The contact owns a 2006 Nissan Pathfinder. The contact stated that while driving between 45-55 mph, the front end of the vehicle vibrated excessively. The vehicle was taken to an independent mechanic for diagnosis. The mechanic stated that the failure could have been related to the transmission. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure mileage was 100,000.

- Mt Vernon, IN, USA

Observed milky puddle under radiator and thick milky pink fluid in radiator and overflow reservoir. Observed during the last 3000miles intermittent vibrations similar to hitting the "wake-up" strips on the side of a highway shoulder or washer-board road texture. Vibrations happened at various times between 1250 to 2250 RPM and 50 to 60mph. Tire balance was ruled out as a cause of vibration by mechanic. Dealer diagnosis verified cross contamination of the engine coolant and transmission fluid caused by an internal transmission cooler in the radiator split apart. A mechanic described the damage that would be caused to the transmission from the cross contamination would include severe corrosion. Transmission failure is imminent because of the severe leakage. Transmission failure is also sudden, because the vehicle was operable even with the presence of a leak. Repair of this condition requires replacement of the radiator and transmission and flushing the coolant system. I would not want to replace a faulty radiator with the same, but our mechanic verified that the Nissan replacement radiator has been be changed from the original part number. Therefore, Nissan has revised their radiator but not issued a recall. Nissan dealer quotes for repair was $9983.

- Tolleson, AZ, USA

I first noticed the transmission was not shifting smoothly and the RPM's were revving very high before a shift. I took it to get a transmission flush on 12/22/12.the fluid seemed to be speckled with a darker liquid. The flush seemed to do the trick, but just this week I noticed between 1000 and 1500 RPM at 25-35 mph the vehicle starts to violently jerk until I accelerate and change gears.

- Hillsdale, NJ, USA

2006 Nissan Pathfinder started having a violent vibration at around 50mph. Researched online and found numerous articles regarding this issue. All information I found indicated that the radiator fluid was leaking into the transmission through the coolent line. When I checked my radiator level, the coolent was low, which was one of the indicators that his was my problem. I took my vehicle to the dealership that I bought it from, less than a year ago with 75,000 miles, they tell me that the warrenty only covers vehicles with less that 80,000 miles. When I purchased the vehicle, there was no mention of the issue, only that the Pathfinder was a solid, certified pre-owned vihicle. Now I will have to pay $3,000 co-pay. Everything I have read, indicates that these issues rarely ever start before 80,000 miles. The fact that the industry is letting them get away with this is disgusting to me. I have a wife and two children riding around in a faulty vehicle with a well known issue I can't aford to fix.

- Bonaire , GA, USA

We took our 2006 Nissan Pathfinder into the local dealer and they told us that we have to change the transmission because the oil is mixing with the fluid in the radiator and transmission. Was estimated at $10,000 to repair.

- Barrigada, GU, USA

This issue is related to NHTSA action number : DP12004 my 2006 Nissan Pathfinder started having transmission issues at roughly 96,000 miles on 2/1/2013. While driving, the car will sometimes shake and rumble when traveling between 40-55 mph. The car has progressively gotten worse in the 2 weeks that the problem started happening. I took my Nissan for repair at berlin city Nissan in portland, Maine on 2/19/2013 and they stated that the problem is a known issue. The known issue was a design flaw with how the radiator and transmission are integrated together. In summary when there is a cracked atf line in the vehicle, that engine coolant will run through the transmission ultimately causing permanent damage and requiring that the radiator and transmission be replaced. The quote I got today to get the items repaired is $6,700. Nissan is aware of this issue and rather than having a recall they increased the warranty duration to 80K miles. From reading on-line, it appears that most people that have had this issue (like me), experience this problem after 80K miles. Therefore, Nissan does not have to pay for the repair. From reading on-line and talking with the Nissan service staff, the problem with my 2006 Nissan Pathfinder is only going to get worse and ultimately present a driving hazard. I need to make a decision soon whether to make the costly repair or get a new vehicle. I am concerned about the car failing putting myself and my passengers at risk.

- Falmouth, ME, USA

Traveling at approximately 40mph. Noticed that car shuddered when I accelerated, but then it stopped as I sped up. Service engine soon light came on and car lost power while I was driving in high traffic. Nearly rearended by the vehicle behind me. Cars has to swerve to miss hitting me. The rpms were high when I applied the accelerator, but the car would only go about 10 mph. Took car to mechanic nearby. Was told there was a problem with the transmission and the car was dangerous to drive. Advised to have the car moved to a local transmission business for further inspection. Received a class action lawsuit notice against Nissan for the very make and model SUV I own. At the time, I had no problems. I have maintained the vehicle well. This very costly transmission problem came on suddenly with no warnings, which I read is typical of this Nissan defect. I believe that these cars should be recalled and all expenses paid for by Nissan as they were aware of the defective radiators. Not only are the costs to their consumers unacceptable ($6,000 repair on a vehicle with little over 100,000K miles), but they are putting people's lives at risk with this defect.

- Hermitage, TN, USA

The radiator coolant has leaked into the transmission which has destroyed the transmission.

- Tallahassee, FL, USA

Driving car starts hard shifting up and down.I don't think I would have made it home if I wasn't so close. After a little online research I check radiator and see that transmission fluid is intermixing with radiator fluid. The worse part is Nissan new this was a problem and hasn't done a recall. I bought this car from a Nissan dealers preowned with 86,000 in 2009. To me they new it was a problem and still sold me a car in which I have little recourse, but to fix myself.

- Lake Worth, TX, USA