Two problems related to turn signal have been reported for the 2014 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Nissan Altima based on all problems reported for the 2014 Altima.
Low beam headlights have deteriorated to the point the car cannot e driven at night. The bulbs were replaced twice with no improvement. Adjusting the bulbs also did not improve the illumination. The car is unsafe to drive at night and the car has been parked for the last four weeks. It's obviously an engineering flaw the consumer should not pay for. You can't value engineer safety. I contacted Nissan to see if they will do the right thing and replace the headlight assemblies. In closing the turn signal bulbs produce more light than the low beam headlights.
Starting in April 2019 on my 2014 Nissan Altima sv. The low beam headlights are extremely dim. They are easily overpowered by the turn signal, and headlights from other vehicles cast a "shadow" when driving behind this vehicle. This presents a serious safety hazard especial in any wet weather event it is almost like having no lights on at all. If there is a minimum lumens that need to be projected to the road this design is not doing it. The bulbs were replaced with appropriate units, no change in the effectiveness of the lights. When I contacted Nissan about this safety defect they provided no solution. And took zero responsibility for the companies design flaw.