My check engine light came on in my car about the same time as we noticed a ticking noise coming from the engine. I took my car to the dealership the next morning to have it looked at. I was told I would need a new engine because oil sludge built up in my engine. They wanted $6300. I had 20K miles on my car. The warranty wouldn't cover it because I had my oil changes done by family and I didn't have the receipts for my oil filters and the oil we bought. I have checked different sources online and this seems to be a problem with 2008 Nissan Sentra's, but the warranty department denies it. I asked them if they would at least take some fault since I couldn't find receipts (even if the oil was never changed, an engine in a brand new car should not be sludged after 20K miles of it), but they would not do anything. They wouldn't discount the cost to me at all. I had to pay the full price out of pocket. I bought the engine and had it done elsewhere, because obviously Nissan is not very trustworthy. As I called around to get quotes on the cost to have an engine installed just about every mechanic I spoke with said that's crazy to need a new engine after 20K even if the oil was never changed.

- Louisville, KY, USA

At 50,000 miles, I had a catastrophic engine failure with my 2008 Nissan Sentra 2.0. when I pulled into the gas station, my car had no coolant and no oil at all. The oil pressure light did not illuminate and the coolant gauge appeared normal. The dealership cannot tell me why the warning lights did not illuminate when fluids became low. I service my car regularly. My car gave no indication of any problems. Dealership states that there is no evidence of leakage. Nissan is stating that it is due to lack of service - my point is the warning lights did not illuminate at all which resulted in engine failure. If I had been on the highway this could have resulted in significant injury, fire, etc.

- Gillet, PA, USA

2005 Sentra 1.8 S. heater would be hot then cold, have replaced thermostat 5 times. Car never overheated. Gauge would go just under 3/4 of way and then suddenly drop to normal. 69,000 miles, check engine light came on, reading multiple misfires. Bringing to dealer for fuel tank recall. Running very rough, rpms 2000 before vehicle will move max out at 5000. As soon as you remove foot from gas, suddenly drops to almost 0 rpms. Dealer said blown head gasket, oil pan gasket bad. Had to have head in machine shop due to 2 plugs stuck. When I picked up vehicle, mechanic said head was warped. I asked what I needed to watch for being that it never did overheat. The response was, with this gauge goes just over half, it is overheating. Ended up costing $2,000 for a 3 yr 4month old vehicle that never overheated.

- Chesapeake, VA, USA