Bmw N55 Problems

Bmw N55 Problems : Most Common BMW N55 Engine Problems

The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The N55 replaced the naturally aspirated BMW N54 engine and was introduced as part of BMW’s EfficientDynamics series. The most common problem with the N55 is the high-pressure fuel pump (HPFP).

The HPFP supplies fuel to the injectors at very high pressure, and if it fails, the engine will not start or will run very poorly. Many owners have experienced this issue, and it can be quite costly to fix. Other common problems with the N55 include water pump failures and oil leaks from the valve cover gasket.

If you own a BMW with the N55 engine, you may be experiencing some common issues. Some of these problems are:

  • The engine may hesitate or stall when starting up.
  • There may be a loss of power while driving.
  • The check engine light may come on.
  • You may notice a decrease in fuel economy.

If you’re experiencing any of these issues, don’t panic! There are some things you can do to try and fix the problem yourself. First, check your air filter to see if it needs to be replaced.

If that doesn’t help, then you can try cleaning the Mass Air Flow sensor. If neither of those works, then it’s time to take your car to the mechanic and have them take a look at it.

Is Bmw N55 Reliable?

The BMW N55 engine is a reliable engine that has been used in many different BMW models over the years. This engine has a turbocharger and produces good power and torque figures. It is a reliable engine that has been known to last for many miles without any major issues.

How Long Will a Bmw N55 Engine Last?

The BMW N55 engine is a turbocharged straight-6 petrol engine that was produced from 2009 to 2016. It replaced the naturally aspirated straight-6 BMW M54 and was introduced in the F07 5 Series Gran Turismo. The N55 was developed alongside the twin-turbocharged N54 and debuted after it.

The engine has a cast iron block with an aluminum head with Valvetronic variable valve timing and double-VANOS variable camshaft timing. It uses direct fuel injection, has two mono-scroll turbochargers, and features heavily revised intake ports, exhaust ports, pistons, connecting rods, and bearings compared to the N54. Unlike the N54, the N55 uses only one turbocharger in most applications; however, a dual-stage setup is used in certain high-performance variants such as the 1M Coupe (E82) & M2 (F87).

BMW claims that despite having only one turbocharger, power output remains unchanged from the twin-turbocharged version due to improvements in thermal efficiency. In addition, fuel economy is improved by up to 10% over its predecessor while emissions are reduced by 30%. The first car to use the N55 engine was the 2010 E89 Z4 sDrive35i/is; followed by 135i/is (E82/88), 335i/is (E90/92/93), 535i GT (F07), 640i Convertible & Coupe (F12/13) and 740i/Li (F01/02).

M Performance models using this engine include the 1 Series M Coupé (E82), Z4 sDrive35is (E89), and 335is(E92). The lifespan of any particular engine depends on a number of factors including but not limited to: driving habits; maintenance schedule; climate conditions; roads driven on etc. That being said, if all things are equal, you can expect your BMW N55 engine to last between 150 – 200 thousand miles before needing any major work done.

How Long Do N55 Turbos Last?

The N55 turbocharged inline-six engine has been used in a variety of BMW models since 2009. It is a reliable engine, but like any turbocharged engine, it is not immune to problems. One common issue with the N55 is turbo failure.

Turbo failures can occur for a number of reasons, but the most common cause is oil starvation. When oil starvation occurs, the lack of lubrication will cause the bearings in the turbo to fail. This can happen if the oil level gets too low or if there is an oil leak.

Another common issue with the N55 is carbon buildup on the intake valves. Carbon buildup can restrict airflow and lead to reduced performance and fuel economy. The best way to prevent these issues from occurring is to make sure that you keep up with regular maintenance and check your oil level frequently.

Does N55 Have Rod Bearing Issues?

The N55 engine is a turbocharged inline-six engine produced by BMW. It debuted in the 2009 E92 335i and was also used in 2012 F10 535i. The N55 replaced the naturally aspirated N54 and was BMW’s first turbocharged six-cylinder engine.

It is also BMW’s first turbocharged petrol engine to use a single twin-scroll turbocharger. The N55 has been praised for its smooth power delivery and high fuel efficiency. However, some owners have reported rod-bearing issues with their engines.

These reports are relatively rare, but it is important to be aware of them if you own or are considering buying an N55-powered BMW. If you experience any unusual noises or vibrations from your engine, it is important to have it checked out by a qualified mechanic as soon as possible. Rod bearing issues can cause serious damage to your engine if left untreated, so it is best to err on the side of caution and get your car checked out if you suspect there may be a problem.

Bmw N55 Problems
Bmw N55 Problems

Bmw N55 Engine Failure

If you own a BMW with the N55 engine, you may have experienced some engine problems. The N55 engine is known for its high performance and fuel efficiency, but it’s also known for its tendency to fail. Many BMW owners have reported engine failure with their N55 engines, and the problem seems to be getting worse.

There are several reasons why the N55 engine may fail. One common issue is oil starvation. This can happen if the oil level gets too low or if the oil isn’t changed frequently enough.

Oil starvation can cause serious damage to the engine, and it’s one of the most common causes of N55 engine failure. Another common issue is carbon buildup. The N55 engine uses direct injection, which can cause carbon buildup on the intake valves.

This carbon buildup can eventually lead to engine failure. Finally, there have been reports of water pump failures causing overheating and engine damage. If your BMW has experienced any of these issues, it’s important to get it fixed as soon as possible to avoid further damage.

If you’re having trouble with your N55 engine, bring it to a reputable mechanic or BMW dealer for diagnosis and repair. With proper care, your BMW should provide years of trouble-free driving pleasure.

N55 Reliability Mods

If you’re looking for ways to make your N55 engine more reliable, there are a few mods you can do to achieve this. One mod is to upgrade the engine’s oil cooler. This will help keep the oil temperature down, which will in turn help extend the life of the engine.

Another mod is to install a catch can. This will help prevent oil and other fluids from entering into the intake manifold and causing issues. Finally, you can also consider upgrading the intercooler.

This will help reduce heat soak and improve performance.

Bmw N55 Reliability

The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The N55 replaced the naturally aspirated N54 and was introduced as part of BMW’s EfficientDynamics technology campaign. It is one of BMW’s first engines to use a twin-scroll turbocharger.

It also won three straight International Engine of the Year Awards from 2011-2013 in the 2.0L category. The Reliability rating for the BMW N55 is 2.


If you’re the owner of a BMW with an N55 engine, you may have experienced some common issues. These problems range from small annoyances to serious mechanical failures. The good news is that many of these issues can be resolved by taking your car to a reputable BMW service center.

Here are some of the most common BMW N55 problems:

1. Oil Leaks: If you notice oil leaks coming from your car, it’s likely due to a faulty oil filter housing gasket. This problem is relatively easy to fix and shouldn’t cost too much money.

2. Carbon Buildup: Over time, carbon buildup can occur in the intake valves and combustion chambers of your engine. This can lead to decreased performance and fuel economy. To clean out the carbon buildup, you’ll need to take your car to a professional who has experience with this issue.

3. Turbocharger Failures: In some cases, the turbochargers on N55 engines have been known to fail prematurely. If this happens, you’ll need to replace the entire turbocharger assembly, which can be quite expensive.

4. High-Pressure Fuel Pump Failure: The high-pressure fuel pump is responsible for supplying fuel to the engine at high pressure.

If this pump fails, it can cause engine misfires and reduced power output.


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