Q: I'm looking to buy replacement motor mounts. How many of the front and rear do I need? 2004 Nissan Sentra

Hello - there are a total of 4motor/transmission mounts. Given the transverse mounting of the engine/transmission, there are ambiguities in "front", "rear" and so on. As a consequence, parts manufacturers are offering them as a set. Replacement is best done as a complete set once 1 fails, since the others are stressed, and fail quickly. I would recommend amotor and transmission mount replacementfor all 4 mounts by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.