Three problems related to vehicle shudder have been reported for the 2013 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Honda Accord based on all problems reported for the 2013 Accord.
Starter failure described in Honda's TSB 16-002. Car exhibited a grinding noise upon trying to start. It would fail to start. This was an intermittent problem. Honda finally replaced the starter but was unwilling to warranty the known problem. A year later I am having the same problem.
Vehicle shakes back and forth while reducing or increasing speed around 10 mph. This happens often in stop and go traffic. Honda appears to have documented the problem under sb 13-053.
First incident was approx in Aug, 2013. Driving on the highway accelerating at 36-40 mph, car starting shuddering and lunging forward, loud noise coming from car and it wouldn't accelerate. Slowing down didn't help- it made it shudder more. Pulled off road thinking, maybe a flat tire? I stopped the car checked and nothing. I was shaken up because the car was jerking and shuddering and you couldn't control it. I let it sit, while driving home, it had difficulty accelerating to the speed limit of 50. It then shuddered as the car slowed down when you took your foot off the gas, let it coast to a stop w/o applying the brakes. Trying to accelerate, it was very sluggish, then it kicked in and took off. As if the a/c was on, straining the engine. I called the dealer and of course, couldn't duplicate it. They insisted nothing was wrong and it was just some odd incident. I know what the car did. I drove it for almost a year, experiencing this off and on but not to that degree the first time, with the shuddering when you slowed down and the lack of acceleration and then the "kick in". . . It got pretty bad in the mid part of July, 2014. This was happening more frequently. The lack of acceleration - big problem with expressway driving. Took it to the dealer, they indicated a service bulletin had been issued. They ordered a kit (valve?) and replaced the hardware and adjusted the software per the recommendation of Honda. It seemed to be fixed, for five days. It started losing acceleration on the highway, I could barely get to 70 mph in very heavy traffic. Dangerous! I took the vehicle to the dealer again 10 days later and told them it wasn't fixed. The head service tech drove it, wont duplicate. They are trying to troubleshoot. I'm concerned that driving this vehicle for a year with this problem has caused permanent damage to the transmission. I notified american Honda.