
If the speed is not high during the collision and the impact sound is not loud, there should be no problem. If a loud noise is heard during the collision, it might cause the oil pan to dent. Common causes of chassis scratches: Uneven road surface: Concealed road surfaces primarily affect the front bumper, suspension, and tires, causing severe damage. Coping technique: Slow down and avoid such roads if possible. Observe the road conditions and estimate your car's ground clearance to avoid obstacles in advance. Getting the chassis scratched by debris when crossing surfaces: The most vulnerable parts in this situation are the oil pan and suspension, which can easily lead to oil pan rupture. Coping technique: Keep your vision focused farther ahead while driving to spot debris early and avoid it whenever possible.

I just bought an Accord last year, and once when driving in the countryside, the undercarriage got scraped by a big rock, which made a pretty scary noise. I immediately got out to check and found a few scratches on the undercarriage, but fortunately, there was no oil leakage. I asked the 4S shop technicians, and they said minor scrapes are usually not a big deal since the engine guard plate and fuel tank have protective designs. However, you should pay special attention to these situations: if you hear a metal impact sound and then feel the steering wheel becoming heavier, it might mean the suspension system is damaged; if you see fluid leaking on the ground, it could indicate damage to the oil pan or transmission oil lines; if there’s a creaking noise while driving, it might be due to a displaced exhaust pipe or heat shield. It’s recommended not to continue driving after a scrape—first, check underneath the car for any oil stains, then feel the temperature of the impacted area by hand. Even if there’s no major issue, remember to ask the technician to thoroughly inspect the undercarriage screws and anti-rust coating during the next maintenance service.

As a veteran Accord driver with over a decade of experience, I must say the severity of undercarriage scrapes depends on location and impact. The Accord's ground clearance is about 15cm, slightly lower than SUVs, requiring extra caution over potholes. Once I hit a speed bump too fast and dented the exhaust heat shield - while it didn't affect driving, I kept worrying about rust. Here's my hard-earned advice: If you only scrape the front plastic guard, it's likely just surface scratches. But impacts near the middle fuel tank area or metallic clanging sounds probably mean you've hit the crossmember. Rear-end scrapes risk muffler deformation. After any impact, I immediately inspect with a phone flashlight and monitor for abnormal vibrations within three days. On gravel roads, never exceed 20km/h - installing alloy underbody protection is the wisest precaution.

Last month, my Accord had its undercarriage scraped by steel bars at a construction site, which scared me into sending it for repairs immediately. The mechanic said minor bumps on city roads are usually fine, but there are several critical areas to watch out for: if the engine oil pan cracks, it can leak oil; damage to the transmission oil lines may cause hydraulic failure; and a deformed catalytic converter can affect the exhaust system. He taught me a self-check method: park the car on level ground and see if any of the four wheels are tilted, which is a sign of suspension damage. Also, smell for any gasoline odor under the car and feel for loose components. Areas where the undercarriage protective coating is scraped off are prone to rust, so it's best to apply rust inhibitor.


