What Causes the Transmission Noise in BYD e5?
2 Answers
The causes of transmission noise in the BYD e5 are relatively complex and may include low or deteriorated transmission fluid levels, excessive or insufficient gear meshing clearance, poor gear meshing, excessive bearing clearance, loose fit between the bearing inner race and shaft, or loose fit between the outer race and transmission housing. It is recommended to visit a repair facility for inspection and servicing as soon as possible. Below is relevant information about the BYD e5: 1. Vehicle dimensions: Length, width, and height are 4680/1765/1500mm respectively, with a wheelbase of 2660mm. 2. Powertrain: Equipped with an electric motor producing a maximum power of 160kW and torque of 310Nm, with a top speed of 130km/h. The vehicle is fitted with a lithium iron phosphate battery pack, offering a comprehensive range of up to 305km.
I own a BYD e5, and I used to have transmission noise issues, which was really annoying. Those humming or clicking sounds are mostly caused by gear wear. Over time, metal parts start rubbing against each other. Additionally, insufficient or aged lubricant is a common cause—when there's not enough oil, the gears run dry, and the noise gets louder. Although electric vehicle transmissions have a simpler structure, faulty sensors can also cause abnormal noises because they control power output. Another issue could be a loose chassis, where screws aren’t tightened properly or parts aren’t installed correctly, making the noise more noticeable on bumpy roads. When I took it to the 4S店 for inspection, they recommended changing the oil first. If that didn’t work, they’d check the gearbox or sensors. Usually, avoid aggressive acceleration to protect the drivetrain and prevent minor issues from turning into major repairs—saving money and peace of mind. Regular maintenance is really important; don’t wait until the noise gets worse to address it.
