B58 vs N55: Which BMW Engine is Better?

When it comes to owning a BMW, choosing the right engine is of utmost importance. With the N55 and B58 engines both vying for your attention, it can be a daunting task to make the right decision.

Let’s do an N55 vs B58 comparison, shall we?

Differences	N55 Engines	B58 Engines
Design and Construction	Average reliability, and regular maintenance required	Twin-scroll turbocharger, aluminum cylinder block and cylinder head, integrated exhaust manifold
Performance and Power Output	320-355 horsepower, 300-365 lb-ft of torque	382-503 horsepower, 369-479 lb-ft of torque
Fuel Efficiency	18-26 MPG combined	21-27 MPG combined
Reliability and Maintenance	Average reliability, regular maintenance required	Above average reliability, regular maintenance required
Overall Better Engine	No	Single twin-scroll turbocharger, cast iron cylinder block, and aluminum cylinder head

FAQs

Which Engine is More Powerful Between N55 and B58?

The B58 engine is generally more powerful than the N55 engine.

Which Engine is More Reliable Between N55 and B58?

Both the N55 and B58 engines have been generally well-regarded for their reliability, but there have been some reported issues with both.

The N55 engine has been known to experience issues with the high-pressure fuel pump and fuel injectors, while the B58 reliability has had some drawbacks with some reports of timing chain and water pump failures.

However, it is worth noting that these issues have not been widespread and may not affect every engine.

Can I Upgrade from an N55 to a B58 Engine?

Technically, it’s possible to upgrade from an N55 to a B58 engine, but it very involved and costly process. The N55 and B58 engines have different designs, and swapping one for the other would require not only the engine itself but also many of the surrounding components such as the transmission, exhaust, and cooling system.

In addition, the electronics and wiring of the vehicle would likely need to be reconfigured to work with the B58 engine. Due to these factors, a full-engine swap may not be a practical or cost-effective option for most people.

How do the N55 and B58 Engines Compare in Terms of Fuel Efficiency?

In general, the B58 engine is considered to be more fuel-efficient than the N55 engine. This is due to several factors, including the B58 engine’s use of more advanced technology, such as a higher compression ratio and a more efficient turbocharger.

Which Engine is Better for Performance and Modifications?

Ultimately, both engines can be modified to produce impressive levels of power, but the N55 engine may be a better choice for those on a budget, while the B58 engine may be a better choice for those looking to push the limits of performance with more advanced modifications.

Which BMW Models Have the N55 and B58 Engines?

The N55 and B58 engines have been used in various BMW models over the years. Here are some of the most notable models that have been equipped with these engines:

N55 Engine:

• BMW 1 Series (2010-2013)
• BMW 2 Series (2014-2018)
• BMW 3 Series (2011-2015)
• BMW 4 Series (2013-2016)
• BMW 5 Series (2011-2017)
• BMW 6 Series (2011-2018)
• BMW X3 (2011-2017)
• BMW X4 (2014-2018)
• BMW X5 (2011-2013)
• BMW X6 (2011-2014)

B58 Engine:

• BMW 1 Series (2019-present)
• BMW 2 Series (2017-present)
• BMW 3 Series (2016-present)
• BMW 4 Series (2017-present)
• BMW 5 Series (2017-present)
• BMW 6 Series (2018-present)
• BMW 7 Series (2015-present)
• BMW 8 Series (2019-present)
• BMW X3 (2018-present)
• BMW X4 (2019-present)
• BMW X5 (2018-present)
• BMW X6 (2019-present)
• BMW Z4 (2019-present)

What are the Common Problems with the N55 and B58 Engines?

Here are some of the most common problems we have noticed with these engines:

N55 Engine:

• High-pressure fuel pump (HPFP) failure, leading to misfires and reduced engine performance
• Wastegate rattle or failure, causing a loss of power or excessive exhaust noise
• Valve cover gasket failure, resulting in oil leaks
• Oil filter housing gasket failure, causing oil leaks
• Timing chain or timing chain tensioner failure, which can result in engine damage
• Coolant leaks due to water pump or thermostat failure
• Carbon buildup on intake valves, leading to rough idling and reduced performance

B58 Engine:

• Timing chain or timing chain tensioner failure, which can result in engine damage
• High-pressure fuel pump (HPFP) failure, leading to misfires and reduced engine performance
• Crankcase ventilation valve failure, causing oil leaks
• Water pump failure, leading to overheating and potential engine damage
• Camshaft bearing ledge wear, causing reduced engine performance or engine failure
• Carbon buildup on intake valves, leading to rough idling and reduced performance

Conclusion

The N55 and B58 engines are both powerful and efficient options for BMW enthusiasts. While the N55 engine is a tried-and-true workhorse with a long history of reliable performance, the B58 engine represents a newer and more advanced design with some notable improvements over its predecessor.

In summary, the N55 engine is a dependable and efficient engine that has been used in a wide variety of BMW models over the years. It offers good performance, reasonable maintenance costs, and a solid track record of reliability.

On the other hand, the B58 engine is a more modern and sophisticated engine that delivers improved power, torque, and fuel efficiency, as well as advanced features such as variable valve timing and direct injection.

If you are considering choosing between the N55 and B58 engines, our recommendation would be to carefully consider your priorities and budget.

If you prioritize proven reliability and value, the N55 engine is likely the better choice for you. However, if you are willing to invest in a more advanced and powerful engine with better efficiency, the B58 engine is worth considering.

it’s important to keep in mind that both engines have their strengths and weaknesses, and the decision ultimately comes down to personal preferences and priorities.

Whether you opt for the N55 or the B58 engine, you can rest assured that you are getting a high-quality engine that will provide you with many years of driving pleasure.