A quiet and stable “song” of the motor pleases the ear of the driver. But some of the modern engines will not sing for long, their limit to the first overhaul is 100,000 kilometers.
And so that you do not encounter such a nuisance, avoid cars with an engine that got into the top 5 of the most unreliable engines according to the publication Car and driver.
5. BMW N 63b44
This modern 8-cylinder power unit complying with the Euro 5 environmental standard boasts a large volume of 4.4 liters and an impressive power of 400-462 hp.
Its release has been established since 2008, but the design was not very successful, since the exhaust gas catalyst is very close to the last cylinder and often causes it to overheat. Because of this, the BMW N 63b44 may fail after 40 thousand kilometers.
An option to avoid this situation is to drive carefully, avoiding overheating. Also, automotive specialists can cut out the catalyst by installing a flame arrester instead.
Another common problem with these motors is the sudden “death” of the oil pump. It does not depend on the engine modification and is probably a factory defect.
4. Volkswagen 1.4 TSI
The five most unreliable engines according to the Car and driver version included a popular low-volume engine installed on many Volkswagen cars (Tiguan, Golf, Polo, etc.). Already after 50-100 thousand kilometers, he needs to replace the timing chain.
The surest signal that it’s time to change the circuit is the crackling sound. Here is a typical example.
And to find out about the condition of the circuit not by ear, you can use computer diagnostics in a car service.
In addition, VW TSI engines tend to eat high-quality oil and warm up for a long time.
3. Mercedes-Benz M271 E18 ML / AL
These motors were equipped with Mercedes cars in 2002-2015. Their main problem is to stretch the timing chain, and this happens even before the car travels 100,000 km. In later engine modifications, this problem has been fixed.
Another defect of these engines is the too light oil filter housing. Such savings result in quick wear of the inner gasket of the part.
And finally, the third common problem M271 is associated with a ventilation system, the tubes and hoses of which, according to automobile experts, are made of not very high-quality materials.
2. Ford EcoBoost
These turbo engines debuted relatively recently - in 2010 - but their reliability is so low that Henry Ford himself, the founder of Ford, if he was still alive, could say to modern engineers: “I am ashamed of you!”
Powertrains EcoBoost often break down to overcome the hundred thousandth mark.
- The problem with 1 liter units lies in the defective hose in the cooling system. It bursts at high temperatures. 44 682 cars equipped with Ford EcoBoost encountered such a problem. The company said that 96% of the cars were recalled and the problem was resolved.
- Engines with a volume of 1.6 liters have another problem - local overheating of the cylinder head, which may result in the release of engine oil under pressure. About 15 thousand engines encountered such a problem, but fire was recorded only in a few of them, and no one was injured. Ford specialists replaced defective parts and added an audible signal when the engine overheated.
1. Peugeot-Citroen EP6 (Prince)
The first place in the list of car engines that break down most often went to the brainchild of the second largest carmaker in Europe and BMW engineers who helped in its development.
Despite the joint efforts, the creation of the PSA and BMW was unsuccessful. He quickly wears out the timing mechanism, and this "Prince" eats oil as if into himself. Already at a run of 40 thousand km, many motorists began to hear the rumbling sound of the timing, which symbolized the problems that arose there.
