Why Does the Steering Wheel of a BMW 3 Series Suddenly Become Heavy?

[RiverRose]

If the steering wheel of a BMW 3 Series becomes increasingly heavy, the primary consideration is dirty power steering fluid. Reasons for the BMW steering wheel becoming heavy: Dirty power steering fluid; or power steering fluid leakage, leading to insufficient fluid levels; excessively tight bearings in the steering system; over-tightened tie rod ends; bending of the steering shaft or sleeve causing jamming; and whether the tires are underinflated—underinflated tires increase contact area and friction with the ground, also resulting in a heavier steering wheel. Solutions for a heavy BMW steering wheel: Replace the power steering fluid or loosen the tie rod ends slightly. Check if the tires are underinflated, as underinflated tires increase contact area and friction with the ground, leading to a heavier steering wheel. The BMW 3 Series is a new-generation sedan product from BMW Group, with a body weight of 1465 kg, equipped with an inline 4-cylinder gasoline engine.