During acceleration the vehicle makes a loud clunk that is not only heard but felt on the floor under your feet.

- Toms River, NJ, USA

Summer 2013, while driving on the freeway at 60 mph, some tire debris off an 18 wheeler truck tire was on my lane, , to avoid hitting it and or the vehicles next to me I looked into my rear view mirror to check for cars behind me and made a sudden slow down, but not a complete stop, ,I pressed the gas pedal to go around the debris and the engine revved up, but the car did not move. It took the cvt transmission several seconds to catch up to the engine, before the car started to move again..I told a service manager at ipoc Nissan dealer in san antonio about this and he seemed to brush it aside, stating those things happens with cvt's. what the dealer did find was an engine oil leak between the transmission and engine, you can't really see the oil leak, but the fact that dust collects around it indicated and the rest of the underside is cleaner. The dealer had to remove the transmission, parts connected to it, ,front axle etc..the flywheel to replace a defective rear engine main oil seal. This was at about 7000 miles into this new Nissan Sentra. Also I have made countless complaints to Nissan and it's dealer of the horrible knocking from the engine (2.0) on start ups. And somewhat gets quieter after warm-up, but is still present at about 2000 RPM and up.. Nissan has time after time refuses to accept that they have a mechanical product defect, instead they claim the knocking is coming from their fuel injectors, to the ABS brakes systems, ,to the trunk lid..these are the excuses they have told me. I would not like to pass on these problems to some other person if I get rid of this new car, ,what I would like Nissan to do is make good on their product, their advertising on tv, radio, and other media is deceiving and Nissan is trying to avoid having to fix their problems. The problem with the stop and go on the cvt happened again and I reported it to the dealer.

- San Antonio, TX, USA

I have the same complaints as the following: Date complaint filed: 09/05/2012 component(s): Power train, structure date of incident: 08/09/2012 NHTSA id number: 10473871 date complaint filed: 01/18/2012 component(s): Power train, service brakes, hydraulic, suspension date of incident: 01/12/2012 NHTSA id number: 10444380.

- Dallas, TX, USA

Upon accelerating after first starting and going about half a mile car makes a clunking noise like you have ran over something even though you haven't. does this all the time after first starting and taking off. Also trunk had trouble closing and there seems to be a gap in trunk.

- Lakeland, FL, USA

I just purchased a brand new off the lot 2012 Nissan Sentra immediatly called the dealership upon leaving told them the alignment was off they said to bring it in and they would realign the car, in the meantime when I apply the brakes the car wants to keep going and throughs itself into another gear where it would lung forward, which means I am having to press on the brakes harder in order not to be thrown into traffic. I took the car in and at first they could not duplicat the problem then all of a sudden it is the transmission that needs to be repalced why is it a brand new car needs a new transmission"?" now they are telling me that they will extend the warranty for me really! wow why should the warranty be extended when I have a brand new car I keep asking for a new Sentra just switch it out make life easy on us all.

- Romoland, CA, USA

TL - the contact owns a 2012 Nissan Sentra. The contact stated that the vehicle was shifted into drive but instead, the vehicle began to reverse. The contact had to turn the vehicle completely off in order for it to reset and resume normal operation. The vehicle was taken to the dealer who was unable to diagnose the failure. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure and the current mileage was 484. Kmj

- Honolulu, HI, USA