BMW N47 vs M57 / M57N / M57N2 – Ranking of legendary diesels: performance, reliability and aftermarket parts costs
In the automotive world, BMW is known for its excellent diesel engines that combine performance, durability and economy. Among them, the N47 and M57 units, along with its M57N and M57N2 variants, deserve special attention. This entry is a comprehensive comparison of these legendary engines in terms of performance, reliability and the availability and cost of spare parts on the secondary market.
BMW N47 – a modern, highly efficient diesel engine
The BMW N47 engine is a four-cylinder diesel unit produced from 2007 to around 2013, known for its good dynamics and exceptional fuel economy. It is available in 1.6 and 2.0 liter variants (N47D16 and N47D20C ) and is equipped with an advanced common rail system with a turbocharger, which provides flexibility and power from 94 to 215 hp. The N47 is distinguished by high torque available already in the low rev range, which translates into a very pleasant and dynamic drive, especially in models such as the BMW F20 125d, F30 325d or X1 E84 25d xDrive.
Advantage? Lightness of the aluminum block, high efficiency of turbocharging and great performance with low fuel consumption. It won awards - including "International Engine of the Year".
Disadvantages: key problem – timing chain at the back of the engine, which wears out faster (about 100,000 km), and failure often means a major overhaul or engine replacement. Additionally, EGR valves and turbines were prone to failure. In newer versions, BMW introduced improvements, but the risk remained.
Used Parts Costs : Cheap used turbochargers, manifolds and possibly complete units are readily available at Global Parts.
BMW M57 / M57N / M57N2 – the legend of six-cylinder diesels
The M57 engine is an inline, six-cylinder diesel engine produced from the late 1990s to 2013. The M57N and M57N2 versions are the next evolutions of this engine, which are characterized by greater power and better work culture. The M57N2, installed in the BMW e60 M57, BMW X5 E70 M57 and BMW e90 M57 models, offers power from around 163 to 286 HP, and thanks to the precise injection system with piezoelectric injectors, it allows for performance exceeding many competing diesel engines. Its durability and tuning potential are widely appreciated in the automotive environment. Advantages: huge torque, proven Garrett turbochargers long service life - often exceeds 300,000 km without serious failures. The M57N2 offers a more efficient cooling system and a DDE system with higher fuel pressure, which translates into better work culture. Faults: the most common are turbo, EGR (with minor self-ignition) and injectors. Sometimes it is necessary to replace the swirl flaps manifold, but generally the costs are lower and repairs are simple. Aluminum versions (M57N2) much lighter and cultured. Used Parts Costs: Engine components such as (turbo, EGR, swirl valves) as well as complete M57N2 units are available at Global Parts – in high quality and original.
Performance and driving dynamics
| Engine | Capacity | Power (HP) | Torque (Nm) | Engine type | Sample models |
|---|---|---|---|---|---|
| BMW N47 | 1.6 / 2.0 | 94-215 | up to 450 | 4-cylinder diesel | F20 125d, F30 325d, E84 X1 |
| BMW M57N2 | 3.0 | 163-286 | up to 580 | 6-cylinder diesel | E60 M57, E92 M57, X5 M57 |
| The M57N2 engine, thanks to its larger capacity and number of cylinders, offers higher power and torque, which translates into better performance, especially in dynamic driving and when overtaking. In turn, the N47 is a more economical engine, ideal for everyday driving and long routes, where low fuel consumption counts. |
Reliability and common problems
BMW N47
Although the N47 engine is more modern, it has its weak points. The most frequently mentioned problems are timing chain failures, which can lead to serious engine damage. There are also problems with the EGR valve and contamination of the intake system, which affects the engine's performance and exhaust emissions. Nevertheless, with proper use and regular replacement of consumable parts, the N47 is a durable and economical engine.
BMW M57 / M57N / M57N2
The M57 engine is very durable and strong. The M57N and M57N2 versions of the timing have improved many technical issues, which has increased reliability. Typical faults include turbocharger wear, injection problems and high-pressure pump failures, but thanks to the solid construction and the use of original BMW parts, repair costs are often reasonable. This engine is known for its longevity, often exceeding 300,000 km.
Spare parts - availability and costs of BMW engines
N47 and M57N2 parts market
The availability of car parts for both engines is very good, both in terms of original parts and used car parts from dismantling. In Poland, there are many automotive shops and vehicle dismantling stations specializing in BMW parts, offering a wide selection of spare parts at attractive prices. You can find there, among others, turbochargers, injection pumps, timing belts, gaskets or cooling system elements, which significantly facilitates servicing and repairs.
Parts and repair costs
- M57N2 Engine – Due to the larger capacity and more complex design, parts and repair costs are higher than in the case of the N47. For example, a complete M57N2 engine can be found on the secondary market for around PLN 6,700, and only original or OEM parts are used.
- BMW N47 Engine – N47 parts are usually cheaper, but you should remember about the costs of potential timing chain replacement, which is quite expensive and requires precise maintenance. On Allegro and other platforms, N47 engines and parts such as water pumps, injectors and cooling system components are available at competitive prices.
BMW engine – which diesel to choose?
| Criterion | BMW N47 | BMW M57 / M57N / M57N2 |
|---|---|---|
| Performance | Good, economical | Very good, higher power and torque |
| Reliability | Good but sensitive chain | Very good, durable and strong |
| Parts costs | Lower but expensive chain | Higher, but wide range of parts |
| Parts availability | Very good (original and used) | Very good (original and used) |
| BMW models | F20, F30, E84 X1 | E60, E92, X5 and others |
| The N47 BMW engine is a great option for those who value economy and modern solutions, while the M57N2 is a classic for fans of power and durability, ideal for larger BMW models such as the BMW e60 M57 or the BMW x5 E70 M57. In both cases, it is worth investing in original parts or proven used car parts from the aftermarket to ensure trouble-free operation. | ||
| For BMW and diesel enthusiasts looking for the best, the choice between N47 and M57N2 should be dictated by driving style, parts budget, and performance and durability preferences. In each case, using reputable automotive shops and trusted BMW parts suppliers is the key to success in keeping your engine in top condition. |
FAQ - Questions from fans and mechanics
| Question | Answer |
|---|---|
| Are used turbochargers for BMW M57N2 worth it? | Yes – used turbochargers have very good parameters, especially for popular versions such as E60, X5 E70 |
| Is it necessary to replace the N47 chain? | It's worth it - a failure can destroy the engine. Global Parts offers complete timing chain kits. |
| Which engine is better for tuning? | M57N2 – with an aluminum block, greater capabilities, and better availability of aftermarket parts. |
| Is the N47 slow to warm up in winter? | Standard – but improved versions of the thermostat improve this aspect. |
