Noticed oil / grease on rear tires sidewall. Taken to Nissan dealer for inspection. Mechanic found a failure of both rear axle seals causing fluid to cover rear axle, differential, rear brakes, and tires. I was advised to not drive the truck due to possible axle and wheel separation from the rear end. If I had not found this I could easily be dead due to wheel axle separation from the vehicle in motion. This is a major safety issue and the vehicle recalled for this problem. After repair was performed the mechanic told me the rear axle housing vent tube clogged causing pressure to build up blowing out the rear seals. Nissan Corp. Usa was notified but declined to assist customer with extensive repairs stating that although being under the 60,000 mile power train limit the vehicle was 5 months over the 5 year age limit. Nissan Corp. Usa did not view this as a safety issue.

- Springfield, IL, 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

Trans cooler ruptured within radiator causing water/coolant to mix with transmission fluid destroying transmission.

- Seal Beach, CA, USA

A whining or buzzing type noise has develop from the timing chain area caused by excess slack in the secondary timing chains. Nissan has issued a service bulletin (ntb09-128) regarding this issue. Replacement of both secondary timing chains and their tensioner shoes will be necessary to repair this concern. My 2008 Frontier has 89K miles on it (out of Nissan's 60K warranty) and has been whining for sometime now. Nissan knows of this problem per the previously mentioned tsp. It is my worry that if the chain breaks or fails while driving it the motor will instantly stop/fail and possibly lock up therefore putting myself and family and or others at great risk for injury.

- Northborough, MA, USA

I received a letter for a settlement offer from Nissan about the transmission cooler failure which leads to total transmission failure. I started to research what was wrong and what I can do about it seeing as my Frontier has 102,000 miles on it and is not covered by the settlement offer. As I did some research I found out about a symptom before transmission failure occurs which is at an idle you have a loss of heat until you rev the engine or start to accelerate and heat returns. I noticed that this had happened around November 2012 while I had left my truck running while parked for a few minutes which I normally do not do. I started to drive and the heat was working again so I thought it might have been a thermostat sticking and watched my vehicle for the signs of this to happen again. I did not notice anything happen again because I do not let my truck sit idle long enough until I tested it today and when I let it sit idle for a minute the heat stopped working properly and returned to normal function when I started driving it. I am trying to find a way to repair the problem before it gets worse but I do not know if I will be able to afford it. So as for the time being I will have to drive my only vehicle to work and hope the transmission does not fail completely and cause an accident or worse. Hopefully I can find a affordable repair or Nissan will be forced to repair it before someone driving down the road at highway speeds has this happen and us consumers suffer bodily injury or fatalities before they will do the honorable thing and admit their vehicle has faulty materials used in its construction and repair them. Only they will suffer in the end if they do nothing.

- Foley, AL, USA

Started to notice heat not working at an idle but when accelerated heat was working fine. I didn't think anything about it seeing as it was cold outside. Then I received a notice for a suit against Nissan for transmission problems caused by transmission cooling line leaking causing coolant and transmission fluid to mix and transmission failing. I now have 102,000 miles on my Frontier and the settlement Nissan offers will not cover me even though vehicle is only 5 years old. I did some research and found out the heat issue is caused by the leak as well. Nissan should have a recall for this issue not a settlement which only covers people who never drive their vehicle. 8 year 80,000 mile extension is a joke. Now I will have to come out of pocket to repair my only vehicle that I have before further damage is done to the transmission. It stutters at the moment hopefully it wont completely fail before I can afford to repair it.

- Foley, AL, 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

Failed transmission twice due to leak of coolant caused by radiator leak. Occurred at 50K and 64K miles. First failure caused a delay after pressing accelerator allowing engine to rev before engaging when trying to accelerate from a stop. Both replacements covered by warranty.

- Beatrice, NE, USA

Total transmission failure due to coolant mixed with transmission fluid.

- Rocky Point, NC, USA

The contact owns a 2008 Nissan Frontier. The contact stated that the vehicle was being repaired for routine maintenance when he was informed that the rear differential axle seals failed. As a result, fluid leaked and the brakes were damaged. The dealer stated the brakes, rear axle, and seals needed to be replaced. The manufacturer was made aware of the failure and did not offer any assistance. The vehicle was repaired. The failure mileage was 78,889 and the current mileage was 79,300. Updated 9/10/12 updated updated 09/17/2012

- Booth Bay Harbor, ME, USA

Left rear axle seal failed and grease from axle coated caliper and brake disc, rendering braking ineffective on that wheel. This is a known issue with Nissan with a technical service bulletin (ntb100008) issued, but Nissan only selectively applies the repair. Grease coating the brake appears visually the same as brake dust, and owner's manual requires inspection of seals only every 7500 miles, so braking may be lost for a considerable period of time before discovery. Serious accident was narrowly avoided on 10-14-2011, ironically on return from dealer, when car ahead stopped in lane to turn left; hard braking and swerve into right lane avoided collision but truck stopped with front grill at same point as front seat in the stopped car.

- Pittsburgh, PA, USA