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Red Flags and Mistakes When Buying a Used Car

Buying a used car can save you money, but it can also bring you unexpected costs and stress if you are not careful. Many buyers only look at the price or how cool the car looks without checking its history, mechanical condition, or how it was used by previous owners. To help you make a smart decision and avoid buyer’s remorse, this article explains common red flags and mistakes you can encounter when buying a used car, especially among popular models like the Ford Ranger and other utes and SUVs that Australians have been buying in large numbers over the past few years.

According to the VFACTS 2025, top selling model (Carsales, 2025)

According to the VFACTS 2025 new car sales report, the Australian market continued its trend toward utes and SUVs. The VFACTS data from the Federal Chamber of Automotive Industries shows that total new car sales reached a record 1,241,037 units, with several models standing out in terms of sales. And these vehicles are now widely available in the used-car market, but buyers still make mistakes when purchasing them if they are not careful.

Top 5 Best-Selling Vehicles in Australia 2025

1

Ford Ranger

56,555 units

2

Toyota RAV4

51,947 units

3

Toyota HiLux

51,297 units

4

Isuzu D-MAX

26,839 units

5

Ford Everest

26,161 units

So, the BYD Sealion will be excluded because it has not come for an auction yet where other 5 are and the following five commonly known models will be included: Toyota RAV4, Ford Ranger, Toyota HiLux, Ford Everest, and GWM Haval Jolion. Below are short descriptions of the popularity of each model, followed by common mistakes that buyers make when buying this model in an auction.

Image of top model in 2025

1. Ford Ranger

The Ford Ranger was Australia’s best-selling vehicle in 2025 with more than 56,000 new units registered. It is highly sought after for its rugged capabilities, towing strength, and suitability for work and recreation. However, buyers need to be aware of some common issues when considering a used Ranger at auction.

Red Flags and Mistakes When Buying a Used Ranger

  • Transmission Issues There are several complaints about 6R80 (6-speed) and 10R80 (10-speed) transmissions in the Ranger, which have been reported to have rattling sounds, torque converter problems, and oil pump failures. Buyers should pay attention to any unusual or old gearbox noises during test drives and check if previous warranty repairs have been made.
  • Engine Problems The 2.3L EcoBoost engines can have oil leaking into the fuel system, which is a serious concern. Also, spark plug corrosion can occur in heavy rain if water pools around them. Inspect the engine bay and look for signs of oil leaks or water damage.
  • Electrical and Electronic Issues Infotainment screens can fail and require replacement. The adaptive cruise control may also occasionally stop working and require vehicle restarts. So, test all electronics thoroughly during the auction inspection.
  • Other Common Issues EGR valves and coolers can fail, leading to coolant burning or pressure problems. Rear axle leaks and heater box failures have also been reported. Look for fluid leaks, and make sure heating and cooling systems are working properly.
  • Buying Considerations Extended warranties are recommended for peace of mind due to the potential for costly repairs. You should always review the maintenance history and records before buying. During auction inspections, test drive the Ranger carefully to identify any unusual noises, rattles, or performance issues.

By keeping these points in mind, buyers can make more informed decisions and avoid common pitfalls when purchasing a used Ford Ranger.

2. Toyota RAV4.

The Toyota RAV4 was Australia’s second best-selling vehicle in 2025 with nearly 52,000 units sold. It is popular for its reliability, fuel efficiency, and versatility, making it a common choice at used car auctions.  However, buyers need to be aware of some common issues when considering a used RAV4 at auction.

Red Flags and Mistakes When Buying a Used RAV4

  • Engine and Mechanical Issues Some older models, 2.4L I4 engines may have oil burning problems. Coolant bypass valves and electric water pumps may also fail. Hybrid models can experience high-voltage cable corrosion. Inspect the engine bay and service records carefully.
  • Electrical and Infotainment Problems CarPlay or Android Auto connectivity can be unreliable, and 12V battery issues may trigger multiple warning lights. Test all electronics and infotainment systems during auction inspections.
  • Interior and Comfort Concerns Wind and road noise can be significant, and water may drip from doors after rain. Check for rattles, creaks, and any signs of water ingress.
  • Safety and Features Lane assist may perform poorly on some models, and older generations have reported rear-impact safety concerns. Verify that all safety systems work correctly.
  • Buying Considerations Because higher trims frequently have more features, take a thorough test drive and check the trim level. Review recall history and maintenance records. Older model years (2006-2008, 2013-2015, and 2019) may have more issues, while 2017-2018 and 2020+ hybrid models are generally more reliable.

By watching out for these red flags and carefully inspecting each vehicle, buyers can avoid common pitfalls and make a safer, more informed purchase at auction.

3. Toyota HiLux

Another strong seller in 2025 was the Toyota HiLux, with over 51,000 units sold.  Known for its legendary reliability and rugged performance, the HiLux is a favorite at auctions and among work vehicle buyers. However, used Hiluxes can have hidden issues if you are not careful.

Red Flags and Mistakes When Buying a Used HiLux

  • High Mileage and Wear Even though Hiluxes are durable, vehicles used heavily in mining, construction, or off-road conditions can have accelerated wear. Inspect the chassis, suspension, and drivetrain for signs of heavy use.
  • Maintenance and Service History Missing or incomplete service records are a major red flag. Always verify regular maintenance, including oil changes, filter replacements, and scheduled inspections.
  • Bodywork and Paint Look for signs of repainting, replaced panels, or inconsistent paint. These can reveal previous accidents or repairs. During auction inspections, check for panel gaps and bumper alignment.
  • Engine and Mechanical Condition Check the engine for unusual noises, smoke, or rough performance. Examine the air filter, belts, and hoses for neglect, and check for oil or fluid leaks.
  • Import and Legal Considerations Some Hilux models may not meet local safety or emissions standards, especially imported vehicles. Confirm that the vehicle complies with local traffic laws and registration requirements in your area.
  • Other Mistakes to Avoid Learn everything you can about the specific model year, test drive the vehicle extensively, and consider hidden costs such as potential maintenance or auction fees. A pre-purchase inspection (PPI) by a trusted mechanic is highly recommended to uncover hidden issues.

By carefully checking these areas and inspecting the HiLux thoroughly at auction, buyers can avoid common pitfalls and make a confident, informed purchase.

4. Isuzu D-MAX

Another strong seller in 2025 was the Isuzu D-MAX sold over 26,000 units and is well-regarded for its reliability and durability. Its rugged build makes it a common choice at auctions, but buyers should be aware of some red flags and mistakes when considering a used D-MAX.

Red Flags and Mistakes When Buying a Used D-MAX

  • Safety Feature IssuesNewer models, especially from 2021 onwards, have overly sensitive safety systems that can be annoying and even potentially unsafe. These systems reset every time the vehicle is turned off, so test them thoroughly during auction inspections.
  • Mechanical IssuesSome 2017–2020 DPF models have reported turbo issues and DPF pressure sensor failures, which may have been fixed under warranty. AC evaporator cracks and front wear or bump steer problems are also common. Inspect the engine bay, suspension, and cooling system carefully.
  • High Mileage ConsiderationsWhile D-MAX engines are durable, vehicles with 300,000 km or more may have significant wear on other components. Always check for signs of high mileage damage and overall condition.
  • Maintenance HistoryA lack of clear service records can be a major red flag. Make sure that all regular servicing, oil changes, and repairs have been documented to ensure the vehicle has been well-maintained.
  • Buying Mistakes to AvoidAvoid overpaying for dealership servicing after warranty, and be cautious about the 2021 models that have sensitive safety features. Generally, pre-2017 models with the 4JJ1 engine and no DPF are seen as more reliable. Watch for minor issues like steering wheel shakes or small oil leaks, which can worsen if ignored.
  • Best Years to ConsiderIf you’re looking for the most reliable and durable options at auction, the 2016 models and pre-2017 non-DPF 4JJ1 engine variants are often the best bets.

By paying attention to these points and carefully inspecting the vehicle at auction, buyers can reduce risks and find a used Isuzu D-MAX that will be reliable and long-lasting.

5. Ford Everest

The Ford Everest was also one of Australia’s popular SUVs in 2025, with strong sales among families and adventure drivers. Its rugged performance and spacious interior make it a common choice at used car auctions. However, buyers should be aware of some common issues to avoid costly mistakes.

Red Flags and Mistakes When Buying a Used Everest

  • Transmission IssuesSome models, particularly the 2.0L bi-turbo diesel, have reported transmission problems. During test drives, pay attention to unusual noises or shifts and check if any warranty or service repairs have been made.
  • Overheating ConcernsEarly 2020 Everest models had overheating issues that were later fixed via service bulletins. Verify that any previous overheating problems were properly addressed.
  • Timing Belt MaintenanceThe 2.0L bi-turbo diesel uses a wet timing belt that must be replaced regularly, typically every 120,000 kilometers. Verify that this maintenance has been completed by looking through service records.
  • Higher Maintenance CostsCompared to Japanese brands, Everest maintenance can be more expensive, especially for parts and servicing. Factor this into your purchase budget.
  • Parts AvailabilityWhile parts are generally available, some components can be more costly than non-Ford vehicles. Check that any replacements are accessible and reasonably priced.
  • Buying TipsTest drive the vehicle thoroughly over uneven roads, review the complete service history, and consider higher trim levels if you need additional features. A professional pre-purchase inspection by a mechanic familiar with diesel 4WDs is highly recommended.

By keeping these factors in mind and inspecting the Everest carefully at auction, buyers can reduce risks and secure a reliable, well-maintained SUV.

Common Red Flags and Mistakes When Buying a Used Car

When buying a used car like a Ranger, HiLux, RAV4 or another popular model, you should watch out for the following things:

1

Not Checking the Full Vehicle History

Before buying a car, always get a comprehensive vehicle history report. This report tells you if the car has been involved in any previous accidents and if it has had major repairs or been reported as stolen. Some sellers try to hide this from the buyer because of the car’s history of damage from previous accidents or odometer rollback problems, and a history check can uncover these red flags.

2

Skipping a Professional Car Inspection

We recommended you never buy a car based on how it looks and how it performs during the test drive. Many serious mechanical problems are hidden until a qualified mechanic inspects the vehicle. A professional inspection can identify issues with the engine, suspension, brakes, or safety systems that would cost far more to fix later.

3

Ignoring Signs of Uneven Wear and Tear

Examine the tyre wear, paintwork, and interior condition carefully. Uneven tyre wear and mismatched paint might mean the car was poorly maintained or was in an accident that was not properly repaired.

4

Not Testing All Features and Electronics

With modern cars, many issues show up in electronic systems. Car buyers often forget to test electronic devices such as air conditioning, infotainment systems, lighting, and safety features like parking sensors and lane assist and only realise defects after purchase.

5

Not Checking Recalls or Known Model Problems

Some popular models, including some years of the Ford Ranger or Toyota HiLux, may have known recall issues or common problems reported by owners. Always check if the specific car you are looking at has unresolved recalls or a history of recurring faults.

6

Only Focusing at Price

A car that appears to be cheap may have serious problems. Always balance the price of the car with its condition, maintenance history, and costs of ownership. A car that appears to be cheap may end up costing you thousands of dollars in repairs down the track.

7

Over‑looking Test Drive Issues

A quick drive around the block is not enough. Test drive the car in different conditions: on hills, at highway speeds, and when braking sharply. Pay attention to unusual sounds and feel the steering and braking response. Buyers do not test drive the car sufficiently and end up overlooking problems with the car.

8

Lack of Understanding Good Market Value

Research and find out the typical prices of used cars with similar years, mileage, and conditions. If a deal is too good to be true, then it probably is. Knowing the fair market value helps you avoid overpaying or buying unreliable cars.

Conclusion

Buying a used car can be a smart and affordable way to get reliable transportation, but it requires a lot of research and inspection. Popular models like the Ford Ranger and other top models sell out quickly, but they can also come with hidden problems if you don’t know what to look for. However, by avoiding the common mistakes and watching out for red flags, you can make a confident purchase that will give you great value without surprises along the way.

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