7 Red Flags to Watch Out for When Inspecting Used Cars


Buying a used car is an exciting experience, whether you're looking for an affordable daily commuter or a luxury vehicle at a fraction of the price. However, purchasing a used car comes with risks, especially if you're not vigilant. A good deal today might turn into an expensive headache tomorrow if you miss some key red flags during the inspection.
In the competitive Philippine used car market, where options are abundant, knowing how to identify potential issues early can save you from costly repairs down the road. In this blog, we’ll outline the most common red flags to watch out for when inspecting a used car, so you can make a more informed and safer purchase. Whether you're a first-time buyer or a seasoned car dealer, this guide is designed to help you spot the signs of a poor purchase before it's too late.
1. Check the Vehicle’s Exterior for Signs of Accidents
One of the first areas to check when inspecting a used car is its exterior. Many issues, including previous accidents, poor repairs, or rust, may not be immediately obvious but can significantly affect the car’s performance and resale value.
Red Flags to Watch For:
- Uneven Gaps: Look for inconsistent panel gaps between the doors, hood, and fenders. This could indicate that parts of the car were replaced after an accident.
- Paint Color Mismatch: If the paint color is inconsistent across the car’s body or looks different in some areas, this could be a sign of repair work following an accident.
- Rust: Pay attention to areas like the wheel arches, undercarriage, and door edges. Rust can indicate structural issues or poor maintenance.
Actionable Tip: Checking the car’s history is very important—take a walk around the car and look for any signs of paint overspray, poorly matched panels, or excess rust. It’s also a good idea to ask the seller for the car’s accident history, if available.
2. Examine the Engine for Oil Leaks and Wear
The engine is the heart of any car, and problems here can lead to costly repairs. Before starting the engine, look under the car for any signs of oil leaks, which can indicate engine or transmission problems.
Red Flags to Watch For:
- Oil Leaks: Oil stains or spots on the engine or under the car may indicate a faulty seal or gasket. It’s best to get these fixed immediately, as they can worsen over time.
- Excessive Wear: Inspect the engine for any signs of corrosion or wear, such as frayed belts, cracked hoses, or old rubber components.
- Strange Noises: When the engine is running, listen for knocking or ticking sounds, which could indicate internal engine damage.
Actionable Tip: Check the oil level and condition by pulling out the dipstick. If the oil looks dark and thick, it might not have been changed regularly, signaling poor maintenance.
3. Inspect the Suspension System
The suspension system is crucial for the car’s handling and comfort. Poor suspension can make the car difficult to drive and lead to costly repairs. If the suspension system is compromised, the car may sway, lean, or bounce too much when driven.
Red Flags to Watch For:
- Unusual Noises: Listen for clunking or rattling sounds when driving over bumps. This can indicate worn-out shock absorbers or struts.
- Leaking Shock Absorbers: If the shock absorbers have oil stains or appear damp, it’s a sign they may need replacing.
- Uneven Tire Wear: Uneven wear on the tires can indicate problems with the suspension or alignment, leading to increased tire replacement costs.
Actionable Tip: Press down on each corner of the car to check the shock absorbers. If the car bounces multiple times, the shocks may be worn out.
4. Look for Signs of Flood Damage
Flooded vehicles are a common issue in the Philippines, especially in areas prone to heavy rains and flooding. Flood-damaged cars can have long-term electrical and mechanical issues that may not be immediately visible.
Red Flags to Watch For:
- Damp or Moldy Smell: A musty odor inside the car is a key indicator that the vehicle may have been exposed to water. Check the carpets and upholstery for dampness or mold.
- Corroded Electrical Components: Inspect the dashboard for signs of corrosion or water marks around electrical components such as the fuse box, dashboard wiring, or connectors.
- Discoloration on Upholstery or Carpets: Look for staining or fading on the upholstery or carpets, as these could be signs of floodwater exposure.
Actionable Tip: Check the car’s history for any reports of flood damage. If the car’s history is unclear, a detailed inspection of the undercarriage and electrical system by a professional mechanic is advised.
5. Check the Transmission for Smooth Shifting
A smooth and reliable transmission is essential for a well-functioning car. Problems with the transmission can be expensive to fix and can significantly impact the driving experience.
Red Flags to Watch For:
- Slipping Gears: If the car hesitates or struggles to shift into gear, it could indicate transmission issues.
- Unusual Vibrations: When driving, if you feel jerking, hesitation, or rough shifting, these are signs that the transmission is not functioning smoothly.
- Grinding or Whining Noises: Strange noises when shifting gears, especially in manual cars, can indicate issues with the transmission.
Actionable Tip: Test drive the car to check the transmission performance. Make sure it shifts smoothly, and listen for any unusual sounds. If possible, have a mechanic perform a diagnostic check.
6. Inspect the Car’s Service and Maintenance History
A well-maintained car is much less likely to encounter serious issues down the road. Before purchasing, ask the seller for the car's service records, which can reveal a lot about its maintenance history.
Red Flags to Watch For:
- Missing or Incomplete Records: A lack of service records or incomplete documentation could be a sign of poor maintenance or even tampering with the car’s history.
- Unusual Gaps Between Services: If the car’s service intervals are irregular or too far apart, it could mean that maintenance wasn’t performed consistently.
- Frequent Repairs: Multiple repairs of the same part or system can indicate recurring issues that may become costly in the future.
Actionable Tip: Ask the seller for a detailed service log. If they cannot provide one, this may be a warning sign. Consider having the car inspected by a trusted mechanic to get an unbiased opinion on its condition.
7. Test the Car’s Electronics and Features
Modern cars are loaded with electronic systems, from infotainment screens to advanced driver-assistance features. Problems with the electronics can indicate deeper issues and are costly to repair.
Red Flags to Watch For:
- Faulty Lights and Indicators: Check all lights—headlights, brake lights, and indicators—to make sure they function properly. Malfunctioning lights could indicate electrical issues.
- Non-Responsive Features: Ensure all features such as air conditioning, entertainment systems, and seat adjustments are working properly. If something isn’t responsive, it could point to underlying electrical problems.
- Check Engine Light: If the check engine light is on, don’t ignore it. It could be an indicator of engine trouble or an electrical malfunction.
Actionable Tip: Test all electronic systems during your inspection, including air conditioning, wipers, infotainment systems, and seat adjustments. If something doesn’t work, ask for a diagnostic test.
Stay Vigilant When Inspecting Used Cars
Buying a used car can offer excellent value, but it’s essential to be cautious and inspect the vehicle thoroughly. Red flags such as engine issues, previous accident damage, flood exposure, and poor maintenance can all signal future problems that may cost you significantly in repairs. To better understand how to keep your vehicle in good condition, check out our guide on car maintenance for used car owners.
By following these steps and carefully inspecting every aspect of the car, you can avoid common pitfalls and ensure you’re making a smart, informed decision.
Whether you're a first-time buyer or a seasoned dealer, being vigilant during the inspection process is the best way to avoid costly mistakes and drive away with a vehicle that will serve you well for years to come.