Is it dangerous to buy a car with non-genuine parts installed?
It is not always possible or advisable to buy or rent a new car. Sometimes you are faced with the need to buy a used car. While the process may seem simple, finding the right used car is very different…
It is not always possible or advisable to buy or rent a new car. Sometimes you are faced with the need to buy a used car. While the process may seem simple, finding the right used car is very different from picking up a new one from a warehouse. There is one important thing to consider when looking for a used car and knowing this before buying can save you a lot of time and headaches down the road.
The answer is yes, in some cases it can be dangerous to buy a car with parts installed by a previous owner or from an unqualified shop. However, there is a fine line between cars modified in a safe way and cars modified in an unprofessional or illegal manner. Some parts can add value to a car to the right buyer, while others can lead to problems and reliability issues later on. That's why it's good to be informed about spare parts and modifications.
Here are a few spare parts that are commonly fitted to used vehicles to save fuel and increase power, but may violate emissions laws or vehicle reliability:
Cold air intakes: They are usually installed due to the advertised increase in fuel economy and a slight increase in power. Cold air intakes are invisible to the average driver. One benefit is that many replace the factory filter with a reusable lifetime filter. They can let in more dust than factory filters and, in some cases, cause a check engine light or an emissions test failure due to an improperly installed MAF sensor.
High performance mufflers/exhaust systems: They are advertised to increase power and give the car a more aggressive sound. It's good to know if a muffler has been installed that changes the sound, or if the entire exhaust system has been replaced with a reliable and government-approved emission grade. If there is no emission control equipment in the exhaust system or muffler, such as an oxygen sensor or a catalytic converter, the vehicle may not be safe to drive and may not pass emission tests. Always check installation receipts for a well-known brand and reputable store. If documents are not available, contact a trusted mechanic.
Supercharger/TurbochargerA: Any time a vehicle is fitted with a non-factory forced induction unit, the owner must provide paperwork and/or a warranty to ensure the work was done by a reputable source. Great care should be taken with cars that have these hefty modifications as they can be very powerful and safety equipment upgrades may be required. Often cars with such modifications are not allowed to be used on the roads. If you are not looking for a race car, avoid cars with these parts.
Secondary exhaust valves/intercoolers/gauges/switches: On vehicles equipped with factory turbochargers, owners may install turbo exhaust valves, boost sensors or switches. These replacement parts, if of good quality, can improve the driving experience for some and make the car more crisp and responsive to drive if installed correctly.
Wheels/tires/suspension parts: A good set of wheels and a lower stance can make a car look great if done right, but be prepared to spend more on tires and suspension parts over the course of ownership if the car has altered camber or excessive camber. Low levels can also damage the exhaust system, crack the front bumper, and puncture essential engine components such as the oil pan.
Keep in mind that while this short list of parts and modifications covers the pros and cons of each common aftermarket part, you as a buyer should have a mechanic inspect for any parts you are unsure about. While a good set of wheels and an aggressive exhaust can add value to the right buyer, in many cases the resale value is greatly reduced. This is because the general consensus is that unmodified cars are more valuable. Always remember that replacement parts can be illegal and can be very dangerous if the exhaust system has been tampered with.
Upon inspection of the vehicle, there may be indications that the vehicle has had aftermarket modifications. These tips include:
- Louder than a normal muffler
- Cone Air Filter
- Suspension that looks changed
- Inappropriate paint, such as next to a spoiler or bumper
- Another steering wheel
Many replacement parts can improve vehicle performance, but it is important that buyers are aware of these modifications and that they are installed correctly. If you suspect your vehicle has had aftermarket modifications, a pre-purchase inspection can help ensure everything is in proper working order.
