What Causes the Rattling Noise When the Atenza Goes Over Bumps?
2 Answers
Atenza's rattling noise when going over bumps is caused by loose component screws. It is necessary to visit a 4S shop to check the loose parts and tighten the screws. Below is a related introduction to the Atenza: 1. Body Dimensions: The Atenza has a body length, width, and height of 4870mm, 1840mm, and 1445mm respectively, with a wheelbase of 2830mm. 2. Powertrain: This car uses two engines, one is a 2.0-liter naturally aspirated engine, and the other is a 2.5-liter naturally aspirated engine; paired with a 6AT transmission. (1) 2.0-liter naturally aspirated engine: The engine has a maximum power of 158 horsepower and a maximum torque of 202 Nm. The engine's maximum power speed is 6400 rpm, and the maximum torque speed is 4000 rpm. This engine is equipped with a variable valve timing control system and direct fuel injection technology, and uses an aluminum alloy cylinder head and block. (2) 2.5-liter naturally aspirated engine: The engine has a maximum power of 192 horsepower and a maximum torque of 252 Nm. The engine's maximum power speed is 6100 rpm, and the maximum torque speed is 3250 rpm. This engine is equipped with a variable valve timing control system and direct fuel injection technology, and uses an aluminum alloy cylinder head and block.
My Mazda6 previously had a similar issue where the chassis would make clunking noises on rough roads. The most common cause is aging and cracked chassis bushings, particularly the lower control arm bushings or stabilizer bar bushings. Over time, these rubber components harden and crack, causing metal parts to collide directly when going over bumps, resulting in noise. Another possibility is a faulty shock absorber upper mount bearing, where reduced rotation flexibility leads to abnormal sounds. Also, check the stabilizer bar end link ball joints—looseness there can cause clunking too. I recommend lifting the car to inspect these connection points closely; shaking the wheels by hand can reveal any play. The Mazda6's sport-tuned chassis means its bushings wear out faster than those in comfort-oriented vehicles.
