How reliable is the BMW N47 engine?
The N47 engine has a more mixed reputation when it comes to reliability. While it offers good performance, it has been known to suffer from more frequent issues, especially as it ages: Timing Chain Failures: The most significant issue with the N47 is the timing chain. BMW does not specify a fixed replacement interval for timing chains. That’s because, unlike timing belts, chains are designed to last the lifetime of the engine — in theory. However, in reality, certain BMW engines are prone to premature wear or failure, meaning the chain may need replacement well before 100,000 miles.The N47 had the timing chain placed at the rear of the engine as BMW felt that access to it would not be needed for the life of the vehicle. BMW usually consider lifetime to mean 100,000 miles. Replacement of the timing chain on the 1 series, 3 series and 5 series engines normally require removal of the engine.We can ensure the lifetime of the timing chain –according to our service experience– by changing the engine oil before the predefined replace- ment period by the manufacturer (2 years or 30,000 km), but it is recommended after driving between 15,000 and 20,000 km.Common Symptoms of BMW N47 Timing Chain Problems This engine is known for early timing chain wear, particularly on models between 2007 and 2015, and waiting too long can lead to catastrophic engine failure. The rattle is typically caused by a stretched chain, worn guides, or a failing tensioner.In the N47 engine, a 2. BMW 1, 3, 5 Series, X1 and X3 models, the timing chain was designed to be ‘maintenance-free’ – that is, to last the lifetime of the vehicle without replacement, unlike timing belts which require periodic changes every 60.
Which BMW engine is most reliable?
The B58 engine has earned a stellar reputation since its 2015 introduction. Unlike earlier BMW turbocharged engines like the N54 and N55, the B58 resolved many chronic reliability issues while delivering smooth, responsive power. The BMW B47 is a turbocharged inline-four diesel engine that debuted in 2014 as part of BMW’s modular B-series engine family, replacing the N47.Generally speaking, the N47 is a pretty great engine. Decent performance with loads of torque available low in the rev range. People will say that the N47 is the worst BMW engine ever due to the timing chain issue .The B47 was built to improve on several known issues of its predecessor, the BMW N47. Key upgrades include: Revised timing chain positioning and durability (no more rear-of-engine design flaws) Euro 6 emissions compliance with reduced NOx and particulate levels.Production Start Date: • The N47 was produced from 2007 to around very end of year 2009 (rare occasions early 2010). The N47TU (Technical Update) was introduced in 2010 and continued until 2014 before being replaced by the B47.
What 2 l diesel BMW engine is notoriously bad?
The BMW 320d 2. Diesel engine variants, particularly the N47D20A and N47D20C, are notorious for timing chain failures. These engines, which are found in several BMW models, including the 3 Series and 5 Series, have a reputation for premature timing chain failure due to faulty crankshaft sprockets. Timing chain problems The most seriously affected units which require the most extensive repairs were produced from 1 March 2007 to 5 January 2009. However, there have been reports of timing chain failure in BMW diesel engines manufactured until 2015.The BMW N47 engine is known for serious timing chain issues that can lead to catastrophic failure if left unresolved.Early 520d cars with the N47 engine may suffer timing chain stretch and EGR cooler leaks. Timing chains can stretch due to poor lubrication or high RPM operation, causing misfires and engine damage. BMW issued recalls to replace leaking EGR coolers because coolant could mix with soot and damage the intake manifold.
What is the best BMW diesel engine?
The M57 3. BMW’s most reliable diesel engine ever produced. Its cast-iron block, robust timing chain design, and conservative tuning enable exceptional longevity when properly maintained. Known Strengths: Cast-iron block construction (later engines use aluminium with iron liners) The BMW N47 engine is a 2. It produces between 143 to 204 horsepower and offers a torque range of 290 to 400 Nm.The BMW B47 is a four-cylinder common rail diesel engine produced by BMW. It debuted in 2014 as the successor to the previous N47 engine.
Which BMW diesel engine to avoid?
The M57 (1998-2013) is the most reliable BMW diesel engine, followed by the modern B47 (2014-present). Avoid the N47 (2007-2014) due to timing chain failures unless replaced, and approach the N57 (2008-2020) with caution due to rear-mounted timing chain replacement costs exceeding £2,000. For modern efficiency and lower running costs, the B47 (2014-present) offers the best balance of performance and reliability, while the N47 should be approached with caution due to well-documented timing chain failures affecting 2007-2014 models.N47 Reliability: Timing Chain Failures: The most significant issue with the N47 is the timing chain. Many owners have reported premature timing chain failures, which can lead to catastrophic engine damage if not addressed in time. This issue is especially common in engines with higher mileage (over 100,000 miles).Decent performance with loads of torque available low in the rev range. People will say that the N47 is the worst BMW engine ever due to the timing chain issue . The timing gear on these engines are known to fail, to the point that BMW issued a recall for the timing chain gear a little while.Smooth, strong and efficient, it’s a favourite with drivers who cover plenty of motorway miles. But as good as it is, the N57 isn’t bulletproof. Timing chain failures and other major issues can lead to complete engine failure and when that happens, replacement is often the only way forward.If reliability, lower failure risk, and cheaper servicing are priorities, the better choice is the M47 or its later version, the M47N/M47N2. If you care about better performance, quieter operation, and modern technology, you can go for the N47 – but be prepared for possible timing chain failures and high repair costs.