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What are the aftereffects after replacing the subframe?

2 Answers

DiRose

08/29/25 8:33am

There is no impact after replacing the subframe. The subframe, also known as the auxiliary frame, refers to the bracket that supports the front and rear axles and suspension, allowing the axles and suspension to connect to the "main frame" through it. After installation, it can block vibrations and noise, reducing the sound that directly enters the cabin. The main functions of the car subframe can be summarized into the following three points: 1. Supporting and fixing role: The car subframe usually has the function of supporting and fixing the engine and transmission. 2. Connection and protection role: The car subframe also has a certain connection and protection role. It can increase body strength by laterally connecting to the vehicle body and can also protect the oil pan and engine to some extent from direct collisions. 3. Blocking vibrations and noise: The car subframe can also block the vehicle's vibrations and noise to some extent, preventing them from directly entering the cabin. Most luxury cars and off-road vehicles are equipped with subframes, and some car engines also have subframes installed.

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LaKayden

09/11/25 6:01am

I just replaced the subframe, but I feel something's off when driving after the replacement. Mainly, the car feels a bit wobbly when turning, with reduced stability, possibly due to misalignment of the new subframe causing suspension issues. Sometimes, when going over bumps, there's a creaking sound inside the car, probably because the bolts aren't tightened properly. If I brake hard on the highway, the body shakes even more noticeably, which is a significant safety hazard. I recommend going to a 4S shop immediately after the replacement for a four-wheel alignment and to check tire wear, otherwise uneven wear could cost hundreds more for new tires. Also, during regular car washes, check the tightness of the chassis bolts to maintain body rigidity.

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