Is the N55 Engine Reliable

Yes, the N55 engine is reliable. It is a twin-turbo inline-six engine that was first introduced in the 2009 BMW 740i/Li. The N55 replaced the naturally aspirated V8 in the 740i/Li.

It has since been used in many other BMW models including the 535i, 335i, and X5 xDrive35i. There have been some reports of issues with turbochargers and high pressure fuel pumps, but overall the N55 is a reliable engine.

The N55 engine is a reliable engine that has been used in many different vehicles. It is known for its high performance and fuel efficiency. This engine is available in both gas and diesel versions, and it has a wide variety of applications.

The N55 engine is also very affordable, making it a great option for those looking for an economical engine.

BMW N55 Engine Reliability 2022

N55 Engine Problems

N55 Engine Problems As with any engine, the N55 is not without its problems. Some of the most common issues that owners have reported are listed below.

1. High Oil Consumption: The N55 has been known to consume oil at an unusually high rate. This is typically due to the engine’s piston rings not sealing properly, which can cause oil to leak into the combustion chamber and be burned off. If you notice that your oil level is dropping faster than normal, it’s best to get it checked out by a mechanic as soon as possible.

2. Exhaust Smell: Another common issue with the N55 is an exhaust smell coming from under the hood. This is usually caused by a leaking exhaust manifold gasket or cracked exhaust pipes. If you notice this problem, it’s best to take your car to a mechanic so they can diagnose and fix the issue before it gets worse.

3. Rough Idle: A rough idle can be caused by a few different things on the N55, but most often it’s due to carbon build-up on the intake valves. This can happen over time as fuel burns and leaves behind deposits, eventually leading to reduced airflow and a rougher idle.

Is the N55 Engine Reliable


How Long Will a N55 Last?

If you’re looking for a reliable engine that will last you a long time, the N55 is a great option. This engine was introduced in 2009 and has been used in a variety of BMW models since then. It’s a twin-turbocharged inline-six engine that produces 300 horsepower and 300 lb-ft of torque.

It’s known for being fuel efficient and having low emissions. While there is no definitive answer on how long an N55 will last, many owners report that their engines have lasted over 100,000 miles with proper maintenance. With regular oil changes and tune-ups, this engine can easily go beyond 200,000 miles.

So if you’re looking for an engine that will give you years of trouble-free driving, the N55 is a great choice.

Is N55 More Reliable?

The short answer is yes, the N55 is more reliable than its predecessor. In terms of numbers, the N55 has a reliability score of 9.4 out of 10, while the older engine only scores 8.6. This means that owners of vehicles with this newer engine can expect fewer trips to the mechanic and less money spent on repairs over the lifetime of their car.

There are several reasons for this increased reliability, which we’ll explore in more detail below. One key difference between the N55 and its predecessor is that it uses a single turbocharger instead of twin turbos. This change was made in order to improve fuel economy and reduce emissions, and it also had the side benefit of making the engine simpler and therefore more reliable.

The N55 also features direct injection, which further reduces emissions and helps to improve fuel economy (although it does require higher-octane fuel). Another key difference is that BMW has switched from using forged steel connecting rods to lighter but stronger aluminum ones. This change was made in order to save weight and improve performance, but it also makes the engine structurally weaker.

As a result, some experts have suggested that the lifespan of the N55 may be shorter than that of its predecessor; however, others argue that this change actually makes the engine more resistant to failure since there’s less mass for any given force to act upon (i.e., Rods are less likely to break when they’re lighter).

How Long Does an N55 Turbo Last?

An N55 turbo can last anywhere from 50,000 to 150,000 miles. Of course, this all depends on how the car is driven and maintained. Those that take good care of their car and drive it responsibly will see their turbos last much longer than those that do not.

Is N55 More Reliable Then a N54?

The short answer is yes, the N55 is more reliable than the N54. But there’s a lot more to it than that. Let’s take a closer look at what makes the N55 more reliable and why you might still see some issues with this engine.

First, let’s talk about what makes the N55 more reliable. BMW updated the engine design with a single turbocharger instead of twin turbos. This change alone made the engine 20% more efficient and reduced emissions by 15%.

The new design also included forged internals which are stronger and can handle higher temperatures and pressures. These updates make the N55 much less likely to have issues with overheating or piston failure. However, despite these improvements, some owners of N55-powered BMWs have reported issues with turbocharger failure and oil leaks.

In most cases, these problems have been traced back to poor maintenance or aftermarket modifications. For example, many owners who track their cars regularly don’t change their oil often enough and this can lead to catastrophic engine failure. Other times, people will install aftermarket parts that are not compatible with the N55 and this can cause all sorts of problems.

If you want to avoid these issues, it’s important to keep up with regular maintenance on your BMW and only use OEM (original equipment manufacturer) parts when making changes or repairs. With proper care, your N55 should give you years of trouble-free driving pleasure!


The N55 engine is a reliable engine that has been used in a variety of applications. It is known for its durability and performance.

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