After reading about previous complaints online and an investigation performed by NHTSA I think the transmission is leaking fluid into the radiator. What was the conclusion of your investigation?

- Sherwood, AR, USA

Vehicle began running poorly and stuttering between gear shifts. Knew about the potential for the transmission and radiator fluid to mix and destroy the engine from the lawsuit that was filed and correspondence we had received from Nissan. Sure enough, took the vehicle to a Nissan dealer and an independent car shop and both diagnosed the same thing - radiator and transmission fluids mixing. No option but to get it repaired for a whopping $4,409.26. It is disgraceful that Nissan will not formally acknowledge this defect and pay for the repair bill no matter what your mileage. This was our first and last Nissan.

- Franklin, WI, USA

I am writing this on May 9, 2013. About a week ago my 2007 Nissan Frontier experienced slow acceleration. I put it in 1st and drove slowly for 1/4 mile then turned off the engine. When I turned on ignition, gear shift was locked. I unlocked manually and tried to start. Nothing. Engine will not crank. No lights on dash. I towed it my local mechanic who tried some electrical work. Nothing so he thought a tranny failure put truck in failsafe. Aamco could not start it so they could not diagnose. Towed it to Nissan. They wanted to change tranny for $8000 new or $5000 used. Too much money for a vehicle w/ 110000 miles. I towed it out to another transmission place and they first thought it was the starter! they changed the starter, nothing doing. Of course jump start is not working so its not the battery. Im now stuck. Previously truck had stalled once on the highway at about 60000 miles and would only drive on gear #1. took it to Nissan dealership. They said they couldn't find any problem with tranny but they replaced the transmission fluid. Later at about 101K the transmission started slipping and Nissan found that the antifreeze had leaked into the transmission. They wanted to give me $2500 toward a $7300 repair. They also offered to give me employee pricing on a new Frontier but I dont want another Frontier, so I refused and instead took it to my mechanic. He put in a new radiator and flushed the transmission. Earlier at about 46000 miles, the fuel gauge stopped working and the fuel sender was changed. Nissan refused to help at that time but later initiated a recall and compensated me for the expense. Its been all pain with this truck which I bought "new" from a dealer with only 300 miles on it. Help.

- Fords, NJ, USA

2007 Nissan Frontier complaint. I am writing this on May 9, 2013. About a week ago my 2007 Nissan Frontier experienced slow acceleration. I put it in 1st and drove slowly for 1/4 mile then turned off the engine. When I turned on back on ignition, gear shift was locked. I unlocked manually and tried to start. Nothing. Engine will not crank. No lights on dash. I towed it my local mechanic who tried some electrical work. Nothing so he thought a tranny failure put truck in failsafe. Aamco could not start it so they could not diagnose. Towed it to Nissan of Edison NJ. They wanted to change tranny for $8000 new or $5000 used. Too much money for a vehicle w/ 110000 miles. I towed it out to another transmission place and they first thought it was the starter! they changed the starter, nothing doing. Of course jump start is not working so its not the battery. Im now stuck. Previously truck had stalled once on the highway at about 60000 miles and would only drive on gear #1. took it to Nissan dealership. They said they couldn't find any problem with tranny but they replaced the transmission fluid. Later at about 101K the transmission started slipping and Nissan found that the antifreeze had leaked into the transmission. They wanted to give me $2500 toward a $7300 repair. They also offered to give me employee pricing on a new Frontier but I dont want another Frontier, so I refused and instead took it to my mechanic. He put in a new radiator and flushed the transmission. Earlier at about 46000 miles, the fuel gauge stopped working and the fuel sender was changed. Nissan refused to help at that time but later initiated a recall and compensated me for the expense. Its been all pain with this truck which I bought "new" from a dealer with only 300 miles on it. Help.

- Fords, NJ, USA

As I was parked at a service station, I put my truck into reverse and it was the same as neutral and never engaged. This is a very common, but not necessary, issue with the transmission on the Nissan Frontier. I almost blew up my engine last year when the radiator cracked and allowed transmission fluid to mix with the coolant and caused the temperature gauge to go way up. This mixture made its way to the transmission and has caused irreparable damage; undoubtedly, this is why I no longer have reverse. I replaced the radiator and flushed my transmission fluid three times last year and thought I may have fixed the problem. Evidentially, the damage had already been done. This problem is very well known to Nissan and, as a Nissan Frontier owner, I was never notified regarding this possible issue. I understand that Nissan has agreed to settle with owners within a certain mileage range; however, my truck is only 5.5 years old and exceeds the mileage requirement because my occupation requires alot of highway time which has put alot of miles on it. I feel Nissan needs to step up and take care of this problem with all owners of these vehicles before someone gets hurt or killed if it hasn't happened already. My truck is now rendered useless until I pay thousands of dollars to fix it. This should not be my problem at all!!

- Cornelius, NC, USA

At about 100,000 miles, I started noticing that on take-off and at about 40 mph, my Frontier would struggle to takeoff or accelerate. When slowing down, if acceleration was needed, the rpms rev up, but the truck does not accelerate. At 40-45 mph transition, going uphill, the truck stutters like it doesn't know what gear to engage. I immediately looked online and found many complaints about the vehicle transmission having a slew of issues related to transmission fluid cooler leaks. I moved to drain the fluid so that I could inspect the color and composition. It was fine. I replaced the filter and fluid. Let it break in for a bit and had same problems. I had 2 different lube shops replace the fluid and flush the transmission and the problems persist. I called up the dealer and they told me that a new transmission would cost 6800 + labor. He said it was very likely the fluid issue, but I was outside the warranty period. This is a design flaw that Nissan knew about from the time they released these vehicles to the public. This is a safety hazard in the need of acceleration at a traffic light, train crossing and many others. I would like to request an investigation on the number of these vehicles being involved in accidents. My vehicle is a 2007 Nissan Frontier SE, VIN: [xxx]. my name is [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Las Cruces, NM, USA

There is a known issue of the radiator leaking fluid into the transmission causing transmission failure. Nissan was involved in a class action suit where the warranty was extended to 80,000 miles but I was 2,000 miles over, so instead of them fixing it for free, I would have to pay a $2,500 deductible. I do not have $2,500 to spend on something that is a known issue. Please let me know if there is any recourse for this situation. Thank you.

- Woodstock, GA, USA

I was merging onto highway interstate 85 in traffic that was flowing at speeds of approximately 75-80 mph, and the vehicle failed to shift out of third gear. This incident forced me to take immediately action and pull to the side of the road, which put my life in danger during rush hour traffic. I learned from the Nissan dealership that the transmission in vehicles that were manufactured the same year, make and model, were defected but there was no recall. Since that time, April 5, 2013 to be exact, the transmission in my vehicle has failed because of a manufacturers defect. Something needs to be done about this hazardous threat to consumers before someone get seriously injured or killed.

- Hoschton , GA, USA

Transmission. We were passing a car when it started to come in our lane. I tried to accelerate out of its way. The transmission shuttered and would not accelerate. Lucky for us the driver saw us at that last second and got back in his lane avoiding an accident.

- Ferndale, CA, USA

Truck started to shake when shifting into over-drive. Took to dealership and found transmission fluid inside radiator. Nissan has extended warranty up to 100K miles and no warranty over 100K (needs recall). Nissan is aware of the issue that allows fluids to mix and create a premature failure of the transmission and radiator. Dealer also stated that there is such high demand on the transmissions that they are on backorder for a month.

- Oakwood, GA, USA

The contact owns a 2007 Nissan Frontier. The contact stated that the radiator was cracked and allowed coolant to enter the transmission. The manufacturer was made aware of the failure and stated that the transmission and radiator would possibly require replacement but first, a diagnostic was required. The vehicle was not repaired. The approximate failure and current mileage was 101,000.

- Jersey Shore, PA, USA

The contact owns a 2007 Nissan Frontier. The contact stated that while driving approximately 5 mph in reverse, the transmission responded with extreme hesitation. The failure also occurred whenever the contact was driving on an incline. The vehicle was taken to an authorized dealer for diagnosis where they advised that the transmission severely vibrated when in reverse. In addition, the transmission fluid was burning abnormally. The vehicle was not repaired. The manufacturer was not notified of the defect. The approximate failure mileage was 111,916.

- Point Pleasant, NJ, USA

The vehicle has the common problem of the radiator mixing engine coolant and transmission fluid causing the failure of the transmission. To me this is a safety issue. The dealers are of no help and neither is Nissan.

- Pompton Plains, NJ, USA

The contact owns a 2007 Nissan Frontier. The contact stated that while driving approximately 40 mph, the vehicle began jerking violently. Additionally, the vehicle would not respond when the gear was shifted into reverse. The vehicle was taken to the dealer for diagnostic testing. The technician advised the contact that radiator coolant was leaking into the transmission and both the transmission and the radiator would need to be replaced. The vehicle was repaired however, the ABS and traction control warning lights were illuminated. The contact stated the neither of the warning lights were illuminated prior to the repair. The dealer was contacted and stated that the ABS module also required replacing. The contact was advised to disconnect the ABS system until the repair could be performed. The vehicle was not repaired. The approximate failure mileage was 85,000.

- Huntington, WV, USA

About 2 weeks ago I started to feel as if the truck was not shifting correctly, soon after that the check engine light came on and I brought it right in to our regular service station. A diagnostic check revealed code P0717 for a turbine revolution sensor and I was told to take it to the dealer. The Nissan dealer did their own diagnostic (no test drive) and found it to be a bad value body, as well as bad timing chain and tensioners, and replacement of all 6 coil packs, along with a few other general findings gave me an estimate of nearly 5 thousand dollars. The 2 diagnostic checks have cost me close to $250. I was in shock and did not have the ability to pay for the repairs up front, so I took the truck to 2 other service stations, one being aamco who specializes in transmissions. None of the 3 other stations found any other issues aside from the transmission. Aamco after a test drive and diagnostic check determined there was an issue but would need to remove the transmission to determine the extent of the problem. Aamco found there to be water being pumped into the transmission, and also claimed it was the 3 problem of this type they had seen so far this month. Apparently the radiator leaks water into the transmission. The fix is a rebuilt transmission and separate cooler for the transmission to assure this won't happen again. At a cost of 3200 to me! this particular aamco is across from the dealer and claims that have done work for the dealership to fix the same problem! I also received a letter back in Oct. /Nov. Indicating a possible radiator problem and an offer of an extended warranty. Nothing was mentioned of the damage that could occur to the transmission! I feel cheated, and in my research have found this to be a very common problem. Nissan should stand by their product and do the right thing by their customers!

- Palm Harbor, FL, USA

The contact owns a 2007 Nissan Frontier. The contact stated that coolant was leaking into the transmission. The vehicle was taken to the dealer where the technician stated that the transmission needed to be replaced. The manufacturer was made aware of the failure but did not offer any assistance since the vehicle was not included in any recalls. The vehicle was not repaired. The VIN was not available. The failure and current mileage was 72,410.

- Memphis , TN, USA

While I have not yet had a failure, or crash I have been notified by Nissan that my truck's transmission may fail suddenly making the vehicle inoperable. This is a concern as I occasionally use the vehicle for commuting to work on the interstate highway system and fear I would be subject to injury or death if I have a sudden failure and there is no place to pull safely off the road. I also use the truck to go deep into the Maine wilderness to fish and hunt and fear if the transmission fails, I could be stranded dozens of miles from the nearest help, putting my health and safety at risk.

- Cumberland, ME, USA

Trouble light came on, "vehicle needs service soon". attempted to drive vehicle to garage and engine would not start. Shop indicate that there was coolant in the transmission fluid and the transmission and engine control module fuses had blown. Nissan dealer said that transmission, radiator, transmission and engine control modules needs to be replaced. He is unable to start the engine and indicates that there may be necessary to do other repairs. The estimated cost of repairs at this point is $8500.

- Spring Valley , CA, USA

Nissan Frontier; truck pick up an vibration that turn into alot of jerking.T alk to the dealer about it, they said to check trans fluid to see if it had a strawberry color to it. If so the radiators was probably cracked and that coolant seep into the trans causing server trans failure. Have no warrenty.computer in trans is damage. Now valve body got to be replace with computer board along with all new clutches and radiator going to cost around 5 grand to fix.

- Rockingham, NC, USA

I was driving on the interstate in overdrive and the truck came out of gear and the engine revved high in rpms. I had to turn overdrive off to get the truck to drive in 4th gear. I took the truck to a transmission shop and they explained coolant from the radiator had gotten into the transmission. They exchange the fluid but explained the transmission may need to be rebuilt if a lot of damage has been done. I was able to drive it for a week more shifting normally. I came to a stop at a red light after a week and when pressing the gas the truck would barely creep forward through the intersection. When the truck was turned off it would not crank back up and it is currently in the transmission shop waiting for parts because of a shortage of needed parts due to the pervasiveness of this issue.

- Charleston, SC, USA