As I am driving, the transmission will not shift at 40 mph. I pull over and find out that it will not go into reverse, either. I drive over to the Nissan dealership and find out that the part of the radiator that connects to the tranny has cracked and dumped all of the radiator fluid into the tranny, killing it. I need a new radiator and transmission. Nissan is covering the costs (for repairs but not alternate transportation for the week that it is taking to fix this) but upon returning home and looking online, I found out that Nissan has known about this problem for about 5 years and instead of doing a recall (costing lots of money), they extended the warranty on the radiator assembly from 3 years/36,000 miles to 8 years/96,000 miles hoping that problems will occur after that time and then they are off the hook for repairs. How dangerous could this have been under different circumstances. I am angry and disgusted with the way Nissan has handled a problem they know could have caused a serious safety risk.

- Scottsdale, AZ, USA

Husband traveling on northwest expressway in Oklahoma city, ok. Stopped at the light in midst of 6 lanes of five O'clock traffic. The vehicle quit. He could not re-start it or safely get out of the vehicle. He used his cell phone to call farmers' help point towing company. Thinking it was the battery, we had it towed home. We replaced the battery with a new one and bought jumper cables. This did not fix it. We called our neighborhood mechanic and had it towed to their shop. He let us know it was the radiator assembly and that we would have to take it to a transmission shop. He gave my husband a fuse to get the vehicle to them without using another towing service. I called the Nissan dealer where we bought the vehicle after seeing that this is a known issue to Nissan (see nissanassist.com). They refused to fix the issue and said we had no warranty help because the mileage was over 100K. They told us to call the Nissan consumer service and gave us their number. I called them and they could not help--even when I talked to the supervisor. I quoted Nissan's words--asking if Nissan did not stand behind the commitment on their site: "Nissan is committed to providing an outstanding vehicle ownership experience for all our customers." She told me she is a contractor working for a company hired by Nissan and did not know. Of course, we did not take the vehicle back to Nissan to be repaired, but took it to aamco transmission, who charged us $5,700 for the repairs and warranty on the work. With the battery, jumper cables, towing charges and the first mechanics' bill--we paid $6,340--having to borrow $6K to resolve this issue. By the time we are finished paying off this loan, the cost will be closer to $10,000. If anyone can do something about this--please do--this known problem by Nissan, cost us close to a quarter of our yearly income.

- Oklahoma City, OK, USA

This report is submitted with regard to a potential problem with this vehicle. Nissan has sent out a notice that this vehicle has a manufacturing defect. The radiator has a weakness so that it may begin leaking internally, which will contaminate the transmission and bring failure of the vehicle to accelerate, or in the most serious state, failure to move in traffic. Nissan has sent a flimsy warranty extension that is only effective should this catastrophe occur. I am now reluctant to drive said vehicle, fearing breakdown and possible fatality in a highway situation. Nissan should be forced to issue a recall to repair this manufacturing defect before total breakdown occurs. At this point I have talked to a local Nissan dealer, and they basically say their hands are tied to help the consumer, due to Nissan corporate decisions. Please help hundreds of thousands Nissan owners (2005-2010 Frontier, pathfinder, xterra) and mandate a recall to repair this potentially dangerous problem.

- Amherst, VA, USA

Leaky rear axle seals and or faulty parking brake can cause loss of property/life.

- Bonaire, GA, USA

This issue is my radiator and transmission contamination. First noticed heat didn't work. Mechanic checked radiator, found leak. Began installing new radiator and saw that coolant was already contaminating tranny. Truck dead at dealership. Called Nissan and they created a case. Denied. Escalated case. Denied. Started new escalation today. I have lost my job because I cant get there!!! what's next my home"??? paid outright for this truck brand new. Drove all the way to Maryland to get it. Less than 5 yrs old!!! but because my mileage was over the 80,000 they wont help. This product already had the flawed components when I drove it off the lot brand new so wtf should mileage have to do with it??" all the faulty sensors were annoying enough but this type of potential for failure should demand total recall....instead they issue warranty extensions and mileage limitations. I was never notified as a registered Nissan owner when this issue was supposedly sent out last fall. And even if I had been my mileage was already over. That should not have mattered as this issue is such a safety and monetary concern. Luckily it didn't fail while I was driving home at 8pm doing 70mph or when I had my kids in it. All in one week I lost vehicle because of flawed product, my job because my flawed vehicle died and my reputation as a reliable and responsible employee. Heartbroken. I want my money back!!!!!!!!!!! never will I buy another Nissan. Greedy & irresponsible company with no sense of commitment to their consumers.

- Lakewood , NJ, USA

Many problems with my 2007 Frontier. First my clutch went at about 65000 miles. Have been driving stick all my life and never needed a clutch. The rear axel leaked and created a bad squeal and damaged my brake pads. My low tire pressure sensors went bad and my heater core went at 60000 miles. I am also getting an electrical smell inside the cabin. Wow never had a vehicle have so much go wrong in less than 5 years. Nissan dealer and Nissan corporate both refused to accept responsibility of any defects.

- Wappingers Falls, NY, USA

Known issues with faulty radiators is causing it to fail and mix antifreeze into the transmission causing the transmission to fail.. the result is a ~$9200 bill from your dealership for a new transmission and radiator.. Nissan absolutely refused to take ownership of this issue making me the owner of my 4th Nissan truck to pay..

- Cornelius, OR, USA

On July 2011 had to pay for new transmission for my truck after the radiator leaked in to the transmission, talked with Nissan and tried to get them to stand behind it and they said they would have if the truck was, in side the new warranty they had put out but I was at 91611. They know what is wrong and how to fix this. They have to put the transmission cooler on the out side of the radiator about $ $200 fix.this replace cost, me more than $ $6000 to get fixed. Now at 97980 miles we are back at the shop having the same thing, done over again, this time they are covering after I had to have a out side tech come in and prove that this was happening again. The first said it had to be replaced and then they had another one check it and said I was hearing the tires and the transmission was good. I would not pick up my truck because the 12 month warranty was about to run out on July 26 2012. After the out side tec checked it out and said the transmission had coolant mixed with it they ordered every thing new again...should not have had to pay for the first one..

- Leicester, NC, USA

Both left and right axles seals failed causing gear oil to saturate the rear disc brake pads, rotor and emergency brake shoes. Extreme decreased braking, which could have led to an accident. This is a true safety problem, which seems to be quite common with the Frontier and titan pick-ups.

- Oakland, MD, USA

Transmission failed while driving in very busy traffic. Maximum 20 mph, while everybody else was driving 55+ mph. Transmission failed without warning leaving my son and I scared to death- if I had been merging into interstate traffic we would have been run over, maybe even killed. Nissan refuses to acknowledge issue with the radiator/transmission fluid cooling system. I hope nobody dies as a result of the defect or the situation it can put an unknowing driver in.

- Greenwood, SC, USA

The radiator in the vehicle ruptured, allowing coolant into transmission. This led to loss of power, hard shifting, and slippage while accelerating. Contacted Nissan, they informed me warranty had been extended but I was 1,600 miles over their arbitrarily extended limit. They suggested I contact the dealer for assistance. The delaer repeated that it was outside of warranty period, and estimated repair costs at $7000. I took truck to local shop, who quoted $5500, and now find out that the transmission parts are on backorder and I will be without my work vehicle for about 1 month. Nissan is clearly aware of this driveline failure issue, but they are attempting to push off the cost of their faulty parts onto the consumer, rather than remedy what is a costly and potentially very dangerous defect.

- Wilmington, DE, USA

The transmission cooler located in the radiator failed and now radiator has transmission fluid in it and the transmission has water in it. Both are ruined and dealer says it is $9000. Apparently this is a known defect only covered up to 80000 miles and Nissan needs to fix this. If it was a known issue, it could have been fixed for a few hundred bucks. Thank you

- Kailua, HI, USA

I am the original owner of a 2007 Nissan Frontier with 114,000 miles. I took my car into the local Nissan dealership for service due to transmission issues. Their assessment astounded me. They informed me that the transmission and radiator needed to be replaced due to a known manufacture defect in the radiator causing antifreeze to be spilled into the transmission. The quoted repair was over $6000. This is my only vehicle and I'm still making loan payments on it. I've treated this vehicle with kid gloves and followed the maintenance schedule religiously. This mechanical issue is due to something that was originally sold to me defective and Nissan of North America is unwilling to cover the repairs. This is a widespread issue and has affected many Nissan owners. There are even class action lawsuits against Nissan to get reparations for repair bills already paid.

- Seattle, WA, USA

Purchased vehicle new with 6spd manual transmission. At roughly 4K miles an intermittent noise was noticed and perceived to be coming from the dash cluster. At 7.8K miles truck was serviced as noise became more prevalent. Dealer made repairs to dash cluster by inspecting and sound proofing area. At 9K miles noise had returned and was sent to a different dealer. They too troubleshoot and insulated the cluster. Noise continued off and on until a return to the dealer for repairs at 14.5K miles. Dealer at this time couldn't replicate issue. After owner of truck performed their own extensive online research the determined the noise to be coming from the clutch and transferring to the pedal on the drivers side. Driver returned to dealer with new description of problem and suggesting of throw out bearing inspection. Upon inspection dealership said that there was abnormal amount of clutch material on top of throwout bearing and was from the driver's driving habit. They want $1000 just to drop transmission and inspect clutch then more $ to replace clutch. From researching online, this is a common problem for Nissan 6spd transmission on the 05+ Frontiers and xterras. Nissan won't warrant the item because it is considered a "wear" item. Many consumer have noticed the noise from the day they purchased vehicle and others have had complete clutch failure at less than 15K, sometimes as little as 5K miles. How, other than factory defect, could this happen? noise was noticed at 4K miles originally. Owner is concerned for safety where if the transmission/clutch fails under certain circumstances the vehicle will be rendered useless putting the driving into harms way. I.e. train tracks, oncoming traffic, emergency vehicles. The problem could leave the driver defenseless and unable to maneuver out of deadly situation.

- Highlands, NJ, USA