BMW N47: Typische Probleme & Haltbarkeit (2024)

FAQs

What is the most common problem with the N47? ›

Timing Chain Failure: The N47D20C engine has been plagued by timing chain issues. Premature wear and stretching of the timing chain can occur, leading to engine misfires, rattling noises, and even engine failure. This problem often necessitates the replacement of the timing chain and associated components.

It is recommended to service these engines around every 5,000 miles as old oil does not lubricate as well and high temperature oil turns to carbon. These lumps of carbon move around the engine and can block nozzles which would be keeping the timing chain lubricated and running smoothly.

It delivers respectable power and offers an abundance of torque early in the rev range. Despite its merits, the N47 has faced criticism, largely due to concerns over timing chain reliability. Up until 2011, these engines were susceptible to catastrophic timing chain failures.

47T is an update supposed to have addressed the timing chain issue, who knows whether it works or not. Best to avoid N47 altogether. The first major technical update happened in 2009 iirc, in an attempt to address the chains snapping.

The BBC 1 Watchdog program on 12^th June 2013 showed that BMW have had significant issues and complaints from BMW owners about total engine failure in the BMW 1-Series, 3-Series and 5-Series vehicles built between 2007 and 2009 due to BMW N47 timing chains.

If your N20 was produced before 2016, the best preventive maintenance is probably to have its timing chain replaced, whether or not you've experienced problems. N20s manufactured after 2015 have a much better track record in this regard.

N47 – 4 cylinder diesel engine

The chains on these engines are fitted to the rear of the engine, meaning the transmission has to be removed to access the chain gear.

Once the chain fails, the repair bill and work involved jumps considerably. Bear in mind, we always advise 9 years or 90,000 miles as the interval for changing any timing chain. Its a set of moving mechanical parts, and does not have an infinite lifespan! Lots of them snap without any prior warning, or any prior noise!

N47 timing chain recall - BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST. Finally it is official. A few days ago, a recall action was started for the N47 timing chain problem. Only some cars are selected for the recall so you will have to ask first your dealer if your car is included in this action or not.

What engine replaced the N47? ›

BMW N47 is a four-cylinder common rail diesel engine that has many improvements over its predecessor, the M47. In 2014 it was replaced with the B47.

On a run 60-70mpg is achievable just don't exceed 60mph for long. I have an auto n47 m sport and after superchips I can get 50-55mpg doing 70mph ish on a long run. If you stick to 65mph, and drive carefully you can achieve 55-60mpg but in normal motorway driving 50mpg average is about right.

BMW TIMING CHAIN FAILURE

It is very weak – it stretches over time, and ultimately snaps. BMW timing chains have snapped on a range of models across the 1, 3 & 5 Series, most commonly affecting the N47 diesel. We also rebuild M57 & N57 diesel engines, BMW petrol engines & also BMW Minis.

the truth is these engines were build to last without problems for 100.000 km. after that you begin to rebuild the engine. fuel injectors is the major problem every 50-60.000 km.,depends on use .

One of the most notorious problems faced by the BMW N47 engine is excessive timing chain wear, often leading to its premature failure. Owners may notice a metallic rattling noise coming from the engine, indicating this issue.

the truth is these engines were build to last without problems for 100.000 km. after that you begin to rebuild the engine. fuel injectors is the major problem every 50-60.000 km.,depends on use .