Heard a high pitched whining noise coming from the engine of my Nissan 2008 crew cab 4 wheel drive Frontier. Made an appointment to have the issue evaluated at the same Nissan dealership where I purchased the vehicle (Nissan of atlantic city - formerly admiral Nissan). I purchased the used Frontier in June 2011; approximate mileage was 40 - 41K. I also purchased an extended warranty at that time - 48 months, 48 thousand miles (expiration 6/15/15). After evaluating the problem, a Nissan service manager told me that the noise was coming from the timing chain and its components - cost of repair $1900 - $2000 plus 7% sales tax. I asked him if the repair was covered by the extended warranty I purchased. He said no! he informed me that my extended warranty had expired for mileage; I was over by a few hundred miles. This is an existing problem. Nissan had know of, and been dealing with this issue well before I purchased my 2008 Frontier in June 2011. However, this information was never made available directly to the consumer. When the engine whine first began it was low - barely noticeable, but the more I drove the worse it got. If I had been aware of the service bulletins sent to the dealers about this issue, I would have had the vehicle checked out before the warranty expired; the extended warranty had a $50 deductible. My final cost for the repair on 3/28/15 was $1974.16. Nissan of America is at fault and so is the dealership - Nissan of atlantic city. They are both responsible because they both had the information about existing timing chain problems and failed to disclose it.

- Brigantine, NM, USA

My check engine light went on as I was driving home on a Sunday afternoon. With in an hour, and almost arriving home... the vehicle began to slow down and could not accelerate past 25mph. I stopped at a traffic light and felt a very large bang under the truck. As I tried to accelerate from the light I could only get up to 25mph. Then the truck stalled completely, in the middle of a busy street. Luckily no one was close behind me and I had my hazard lights on, otherwise this would have been a sure crash. I took it to a mechanic who checked and informed me that my radiator was faulty and had contaminated and ruined my transmission. I paid $2900 to have it fixed. No help, or money back from Nissan, not even an apology for their faulty parts.

- Berkeley, IL, USA

There is some sort of emission control behind the rear tires. It seems to get plugged and engages my service light to come on. Well since I live on a dirt road it is almost impossible to keep it from being plugged. I've had to have it replaced three (3) different times. It really irritates me.

- Stevensville, MT, USA

I just had to have the radiator replaced and the automatic transmission rebuilt at a cost of almost $3,000 in my 2008 Nissan Frontier SE 4V 2.5 with only 84,000 miles because of the cross contamination. According to carcomplaint.com, the average owner is becoming aware of a problem at 94,565 miles. If Nissan would have recalled the radiators immediately upon knowledge of the defect, it would have saved them from dealing with numerous transmission replacements and customer satisfaction concerns. I brought my truck to the Nissan dealer and I was told by the service manager that the problem was not caused by contamination and I should get help from Nissan who later on denied help for me. The next day I brought my Nissan Frontier to a shop expert in transmissions and their diagnosis was that the failure in my transmission was caused by an "anti-freeze contamination, code 1751". Nissan knew that they had a faulty radiator and instead of recalling the radiator, they extended the warranty knowing that the majority of the cars would surpass 80,000 miles before they started having problems with the transmission. Now looking at high cost to fix the timing chain cover seal. Nissan knows about both of these issues and is not taking responsibility and won't help.

- San Francisco, CA, USA

Service engine light came on. Fuel sensor reported. 2008 Nissan Frontier.

- Winston Salem, NC, USA

Known defect by Nissan. Radiator fluid leaks into transmission causing complete failure of transmission. They have extended warranty for new transmission but comes with a $2500 deductible. Why should I have to pay anything when they know they made a defective product.

- Joppa, MD, USA

I have had this vehicle in twice now due to the smell of leaking anti freeze and have been told no problem, now we have gotten two different things about the radiator and transmission I have called the customer service number they gave and they told me to look for leaks or check fluid for milky color, there needs to be a total recall on these before someone gets seriously hurt!

- Washington, IA, USA