
Coilover suspension cannot pass the annual vehicle inspection. Before modifying a vehicle, the detailed modification plan must be submitted to the traffic management department for review, and the modification can only be legally carried out after approval. According to regulations, the owner of a registered motor vehicle must apply to the vehicle management office at the place of registration for modification registration in any of the following circumstances: 1. Changing the body color; 2. Replacing the engine; 3. Replacing the body or frame; 4. Replacing the entire vehicle due to quality issues; 5. Changing the use nature of the vehicle, such as converting a commercial vehicle to a non-commercial vehicle or vice versa; 6. The owner's residence moves out of or into the jurisdiction area of the vehicle management office.

I've always found it fun to modify coilover suspensions, as adjusting the height can make the car more stable. However, last year when I went for the annual inspection after the modification, the inspector checked the chassis very carefully and said the height must comply with the factory standards. I had to readjust it back to the original settings with tools beforehand to barely pass. My friend wasn't so lucky—he went straight for the inspection after modification and got rejected, later spending time to file the modification before passing. Looking back now, the key is whether the modification alters the vehicle's original parameters, such as ground clearance or stability exceeding standards, which can easily cause issues. The annual inspection is for safety, so I suggest checking local traffic regulations before modifying and filing the modification if necessary to avoid trouble. Don't sacrifice long-term safety for short-term excitement.

Bro, coilover suspensions do enhance handling, and lowering them a bit makes cornering more exciting. But when it comes to annual inspections, it's a bit of a gamble—I've modified mine a few times, and the inspectors spotted the changes right away, failing me because regulations strictly control suspension safety. Remember last year, a buddy had his ride rejected for being too high and had to swap back to stock parts to fix it. The key is to get it documented! If local policies are lenient, you might pass by adjusting to standard height; otherwise, you're asking for trouble. My trick is using adjustable ones—just revert to stock before the inspection and enjoy the mods the rest of the time without compromising safety checks.

From a safety perspective, privately modifying coilover suspensions carries high risks—it can easily lead to loss of control or chassis wear. During annual inspections, I've seen inspectors rigorously examine suspension systems, and vehicles failing to meet factory specifications are directly rejected. Regulations require vehicle modifications to be registered to ensure safety performance. Common issues include failing inspections, necessitating restoration to original condition or facing fines. So don't take chances—consult professionals for evaluation before modifying. I firmly believe OEM parts are the safest choice to avoid inspection hassles and accidents.


