When it comes to the purchase of used cars, there is no doubt you'll save money, but if you buy the wrong model, you could end up paying out a significant amount of money for repairs. Engines with known issues like high oil consumption, timing chain failure, cooling problems, carbon buildup, and costly fuel-system repairs are some of the problems that occur in older cars.
This doesn't mean that all cars in the list below will fail, as these are influenced by maintenance, mileage, driving practices and service history.However, knowing which models and engine combinations have a history of trouble can help you make a safer choice. If you are searching for used cars you should never buy, these examples deserve extra attention before you hand over your money.
When a Bargain Can Becomes a Problem
Buy a used car and save yourself a mountain of cash, but a cheap sticker price isn't really a deal if the engine consistently develops costly problems. Some models and engine combos have become infamous for going bad well before their time.
That doesn't mean everyone will, but the year of production and service history both play extremely important roles in the equation.
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2007-2012 Nissan Altima with the 2.5-Liter Four-Cylinder
The QR25DE four-cylinder that powered these Altimas has linked to high oil consumption and other engine issues, especially as the miles add up. Old-school maintenance can exacerbate problems, so a high-mileage example that's neglected can be particularly dangerous. Check the oil level before buying.
2008-2010 Chrysler Town & Country With the 4.0-Liter V6
Costly engine internals and valvetrain parts plague Chrysler minivans with this engine. The trouble with engine trouble is that the damage becomes obvious once it arrives at the cylinder heads, many of which are not easy to extract without wreaking even more havoc on the engine. Maintenance history is crucial for these vans-pass on any that sound weird.
2001-2005 Chrysler PT Cruiser With the 2.4-Liter Engine
Don't write off the 2.4-liter engine in the early PT Cruisers just yet, but you should be aware that poorly maintained ones can suffer some pretty major timing-belt and cooling-system issues. A car with a timing-belt that hasn't been replaced when it should have been should be a warning sign. Find one with a service record.
2001-2005 Ford Explorer With the 4.0-Liter SOHC V6
This generation Explorer's 4.0-liter SOHC V6 engine is well known for timing-chain issues. If the timing chain breaks or becomes damaged, it will cause severe internal damage to the engine, and your cheap new SUV will suddenly become very expensive to own. Pay close attention to any rattle sounds when starting.
2004-2010 Chrysler Pacifica with the 3.5-Liter V6
Failing cooling systems, clogged lubrication systems, and damaged engine internals do not occur with these vehicles by default, but they become more and more likely the more neglectful the maintenance history is. These vans are getting so old that you should really consider the maintenance history before you decide on purchasing.
2008-2013 BMW 5 Series with the N63 V8
The first BMW N63 V8 drivers know it to be powerful, smooth, and expensive to own when it goes bad. Poor oil consumption, cooling issues and a long list of parts around the engine can cost you a ton of money on a neglected car.
2009-2014 BMW X6 With the N63 V8
Those early X6 models with BMW's N63 V8 also face many issues associated with N63s from this era. The N63 V8 produces a lot of heat and has a complex design while repairs can be very costly both due to parts and labor. An unreasonably cheap example should be avoided.
2006-2010 BMW 3 Series with the N54 Twin-Turbo Six-Cylinder
With some amazing performance figures and good looks, the N54 still retains some residual value as a used car. Just remember that the older it gets, the higher the maintenance costs, and any used N54 buyers should be aware of common issues they may encounter. Fuel system repairs and dozens of other problems may catch you off-guard.
2011-2016 Mini Cooper with the N14 Turbocharged Engine
The N14 turbocharged four-cylinder engine that is used in some Mini Cooper models has been linked to various timing-chain, oil-consumption, and cooling-system issues. Repairing these problems can be quite pricey, as many of them tend to show up over time. A Mini that is poorly maintained becomes a nightmare in the making.
2003-2007 Honda Accord with the 3.0-Liter V6
An Accord from this era is known for having a solid, reliable engine, but some of the V6-powered Accords can be worth a close look because they use a timing belt. The service team needs to replace the belt and pulleys periodically, and skipping that service can cause serious engine problems.
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2003-2007 Honda Odyssey with the 3.5-Liter V6
Such engines can run for hundreds of thousands of miles if you maintain the appropriate service schedule, but a worn timing belt can lead to the ultimate catastrophe. Even more ironically, some versions of the Odyssey have faced issues with their transmissions that require significant repairs.
2006-2010 Volkswagen Passat with the 2.0T FSI Engine
Some concerns have arisen with the early 2.0T FSI engine used in some Passats, including carbon buildup as well as the need for service related to the timing and high-pressure fuel parts system. Routine service is critical as minor troubles can prove costly if they are left unrepaired.
FAQs
1. Why should some used cars be avoided?
Some used cars have engines with known problems that can lead to expensive repairs. Poor maintenance and high mileage can make these problems worse.
2. What should I check before buying a used car?
Check the service history, engine oil level, warning lights, unusual noises, leaks, mileage, and previous repair records. A professional inspection is also a good idea.
3. Are older BMW engines expensive to repair?
Some older BMW engines, especially complex turbocharged and V8 models, can have high repair and maintenance costs when problems develop.
4. Can a used car with a bad engine still be a good purchase?
Sometimes, but only if the price reflects the repair cost and a trusted mechanic confirms the vehicle is otherwise in good condition.
5. Is engine history more important than mileage?
Both matter, but service history can be especially important. A higher-mileage car with regular maintenance may be a better choice than a lower-mileage car that was neglected.
