The rainy season doesn’t just require drivers to be more cautious—it also demands extra vigilance when shopping for used cars. That’s because flood-damaged cars are very common in the used car market, including at auction houses.

From the outside, a flood-damaged used car may look perfectly fine. However, a thorough inspection of all parts of the car reveals numerous hidden defects—ranging from the engine and interior to the electrical system.

To deceive potential buyers, many flood-damaged used cars are “spruced up” to make them seem more appealing. To avoid getting caught buying a flood-damaged car at an auction, here are some key signs to look out for.

5 Signs of a Flood-Damaged Used Car

Even if the car’s body has been polished to a shine, floodwater inevitably leaves traces that are difficult to hide completely. Here are the signs.

1. Musty Cabin Odor and Mud Smell

Floodwater carries organic material and mud that settles behind the floor mats or in the seat foam. This moisture triggers a distinctive musty odor that lingers for a long time, even after using air fresheners.

2. Rust Spots in Hidden Areas

Check the seat mounting bolts, lower door hinges, the parking brake lever, and the gaps between the seat rails. If there is corrosion or thick rust spots, this is a strong indication that the car was once submerged in water.

3. Cloudy or Brownish Engine Oil

Pull out the engine and transmission dipsticks. If the oil looks like coffee with milk or appears cloudy and foamy, it means water has entered the engine compartment.

4. Electrical System Malfunctions and Speedometer Indicators

Water can damage the Electronic Control Unit (ECU) module, wiring harnesses, and sensors. Check whether the Check Engine or Airbag indicator lights come on abnormally when the engine is started.

5. Carpets or Interior Components Look “Too New”

If parts of the floor carpet or door trim have been partially replaced with new ones while other components look worn, it’s possible the previous owner tried to cover up signs of flood damage.

How to Inspect a Used Car Before Bidding at an Auction

Before bidding on a used car at an auction, perform the following checks.

Check the vehicle documents

Verify that the VIN and engine number match the STNK and BPKB. Find out the ownership history, vehicle usage, and the previous owner’s address. The vehicle’s place of origin can be a consideration, but it does not automatically prove the car was ever flooded.

Physical Inspection of a Used Car

Inspect the body, undercarriage, engine compartment, cabin, trunk, and even hard-to-see areas. If possible, lift the floor mats to check the condition of the floor. Look for mud stains, corrosion, and components that appear to have been recently replaced.

Take a test drive if possible

Pay attention to engine noise, transmission response, braking, dashboard indicators, and electrical functions. If you notice anything unusual or signs of damage, it’s best to choose another vehicle.

Bring a mechanic or professional inspector

An inspection by a professional inspector is extremely helpful in assessing the condition of the engine, chassis, and hard-to-reach components.

Safe Used Car Auctions at IBID

If you’re worried about getting a problematic used car at an auction, IBID offers a safe and transparent auction solution with a rigorous inspection process conducted by the expert team at Astra Car Valuation (ACV).

Every used car at an IBID auction comes with an objective inspection report, rated on a scale from Grade A to E. In fact, there are specific labels indicating if a used car has been identified as “Flood-Damaged” or “Accident-Damaged.”

IBID is an official auction house registered with the Directorate General of State Assets (DJKN). One of the business units of PT Serasi Autoraya (SERA)—which is also part of the Astra Group—regularly holds auctions for automobiles, electronics, scrap, heavy equipment, gadgets, and lifestyle items.

To experience the convenience and security of buying and selling used cars at IBID, try the process yourself via the website www.ibid.astra.co.id or the app available on the Play Store and App Store.

Currently, the categories of auction items on IBID are becoming increasingly diverse, including real estate. So, whether you’re a seller or a buyer, you can feel safer and more comfortable.

Don’t forget to follow IBID’s official social media account on Instagram @ibid_balailelangserasi to get the latest auction information and other interesting tips.