(BUYING GUIDE) The BMW N47 engine: How reliable is it on the used market?

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Introduction

Since its launch in 2007 , the BMW N47 engine has established itself as a benchmark in the world of diesel engines for the Bavarian brand. Found under the hood of numerous models, ranging from compact cars to premium sedans, it impresses with its fuel efficiency and dynamic performance.

However, despite its undeniable strengths, this engine has also been notorious for its reliability issues , particularly related to its timing chain. What are the true strengths and weaknesses of the N47? This article offers a comprehensive analysis to help you better understand its qualities and potential risks.

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Models equipped with the N47 engine

The N47 engine was produced in several versions and powered a wide range of BMW vehicles, from compact models to high-end sedans. Here is an overview of the models using this engine:

Version 1.6 L (N47D16)

- Power 94 hp : BMW F20 114d

- Power 114 hp : BMW F20 116d EfficientDynamics

Version 2.0 L (N47D20)

Power: 114 hp

- BMW E81, F20, E87 116d

- BMW E90, F30 316d

Power: 141 hp

- BMW E81, E82, E87, E88 118d

- BMW E90, E91 318d

- BMW F20, F30, F31 318d

- BMW E84 X1 sDrive18d and xDrive18d

- MINI Countryman Cooper SD (R60)

- MINI Cooper SD (R56)

- MINI Convertible Cooper SD (R57)

- MINI Coupe Cooper SD (R58)

- MINI Roadster Cooper SD (R59)

- MINI Paceman Cooper SD (R61)

- BMW F22 218d

- BMW X3 sDrive18d

Power: 161 hp

-BMW E90 320d Efficient Dynamics

- BMW 520d F07/F10/F11

Power: 174 hp

-BMW E81, E82, E83, E87, E88 120d

- BMW E90, E91, E92, E93 320d

- BMW F30, F31, F34, F35 320d

- BMW E60, E61 520d

-BMW E84 X1 sDrive20d, xDrive20d

- BMW E83 X3 xDrive20d

- BMW F22 220d

Power: 201 hp (Twin Power Turbo)

- BMW E81, E82, E87, E88 123d

- BMW E84 X1 xDrive 23d

- BMW F22 225d (2014-2015)

Power: 215 hp (Twin Power Turbo)

- BMW F20 125d

- BMW F22 225d

- BMW F30 325d

- BMW F32 425d

- BMW F10 525d

- BMW E84 X1 xDrive 25d

BMW N47 engine specifications

The BMW N47 engine is a turbo diesel engine available in different displacements ranging from 1.6 L to 2.0 L.

Designed with an aluminum engine casing to reduce weight, it incorporates a double overhead camshaft (DOHC) system and common rail direct injection to optimize combustion and performance. It aligns with BMW's EfficientDynamics philosophy, which aims to improve fuel efficiency while reducing CO2 emissions.

Reliability of the BMW N47 engine: a controversial diesel

The BMW N47 engine marked a significant advancement in diesel engine engineering for the German brand. Launched in 2007 as the successor to the M47, it powered numerous iconic models thanks to its improved performance, fuel efficiency, and reduced emissions.

However, despite its qualities, the N47 is also known for some reliability issues, particularly related to its timing chain . Let's examine its strengths and weaknesses together.

N47 engine reliability problems

One of the most notorious problems with the N47 engine is timing chain failure . Located at the rear of the engine, it is difficult to access, making repairs particularly expensive. A rattling noise coming from the rear of the engine is often an early sign of premature wear. If it breaks, the consequences can be disastrous , even requiring a complete engine replacement.

Other problems have also been reported, including failures of the intake swirl flaps and EGR valves , which can lead to power loss and increased emissions. BMW has acknowledged these defects and implemented recall campaigns for certain versions of the engine.

BMW introduced a major upgrade to this engine in 2011, which reduced the number of reported timing chain failures. BMW then made several further improvements between 2011 and 2015, making the versions produced after 2015 truly reliable.

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Performance and fuel consumption

Despite its reliability issues, the N47 engine is notable for its excellent fuel efficiency . Thanks to its turbocharger and direct injection, it boasts very low fuel consumption, especially on the highway. The power range varies from 94 hp to 215 hp, offering a wide range of options to suit drivers' needs, whether they are looking for an economical or sportier engine.

The most powerful versions were notably fitted to models such as:

- F20 125d

- F22 225d

- F30 325d

- F32 425d

- F10 525d

- E84 X1 xDrive 25d

Conclusion: Should you buy a BMW with the N47 engine?

The BMW N47 engine is a powerful and economical diesel engine, but it has had reliability issues, particularly with the timing chain on models produced before 2011. BMW made several improvements after this period, making versions after 2013 more reliable.

If you're considering buying a BMW equipped with the N47 engine, we recommend choosing a model from 2013 onwards . In any case, it's essential to check the service history, especially any timing chain replacements. Rigorous and preventative maintenance can help avoid costly repairs and ensure a longer engine lifespan.