2008 Bmw 135i problems

Common 2008 Bmw 135i problems

The BMW 135i, introduced in 2008, has garnered a reputation for both its performance potential and common problems. The N54 twin-turbo straight-six engine, which powered the 135i from 2008 to 2010, offers approximately 300HP and 300 lb-ft of torque. While this engine has been praised for its potential, it has also been criticized for its issues.

One common problem with the N54 engine is the High-Pressure Fuel Pump (HPFP). This issue has been well-documented, with numerous owners reporting failures. The HPFP is responsible for supplying fuel to the engine at high pressures, and its failure can lead to a loss of power, poor performance, and even engine damage if not addressed promptly.

Another issue that has been reported is the rocker cover gasket leak. This is a common problem on many BMWs, not just the 135i, and is caused by the failure of the gasket that seals the rocker cover to the engine

. When this gasket fails, it can lead to oil leaks, which can cause damage to other engine components if not addressed.

The oil filter housing and oil cooler are also prone to leaking. This can be a significant issue, as oil leaks can lead to engine damage if not addressed promptly. In addition, if the oil cooler leaks, the oil can drip onto the auxiliary belt, causing it to soften and potentially leading to the belt slipping off the tensioner and damaging the engine

The charge pipe is another component that has been reported to fail. The charge pipe is responsible for carrying the pressurized air from the turbocharger to the engine. When this pipe fails, it can lead to a loss of power and poor performance

The water pump and thermostat are also known to fail. This can be a significant issue, as a failed water pump can lead to overheating and engine damage if not addressed promptly. In addition, a failed thermostat can cause the engine to run at the wrong temperature, leading to poor performance and decreased fuel efficiency

In addition to these mechanical issues, the 135i has also been criticized for its fuel consumption. The car is known to be quite thirsty, with some owners reporting that they were filling up every 11 days, even when driving conservatively.

In conclusion, while the BMW 135i is a capable and fun-to-drive car, it is not without its issues. Owners of this car should be aware of the common problems, such as the HPFP, rocker cover gasket leaks, oil filter housing and oil cooler leaks, charge pipe failures, and water pump and thermostat issues. In addition, the car's fuel consumption should also be taken into consideration when purchasing and owning this car.

Are BMW 135i reliable?

The probability of a repair being a severe or major issue is 18% for the BMW 135i, compared to an average of 11% for luxury compact cars and 12% for all vehicle models. The average total annual cost for unscheduled repairs and maintenance across all model years of a vehicle.

Is the 135i a good daily driver?

It's very usable from day to day and makes manoeuvres such as overtakes incredibly safe and simple. By holding down the left shift paddle you can automatically downshift to the appropriate gear for a burst of maximum performance.

What engine is in a 2008 BMW 135i?

3.0 L 6-cylinder2008 BMW 135i / Engine

The two available engines, a 230-hp, 3.0-liter inline-six and a 300-hp twin-turbo inline-six, are direct hand-me-downs from the current 3-series, as are the six-ratio manual and automatic transmissions.

How many miles per gallon does a 2008 BMW 135i get?

The EPA rates the 135i at 18 mpg city and 26 mpg highway, numbers that don't sound particularly impressive. But in our driving, we saw our average range from 22.8 to 23.5 mpg, economy we just wouldn't expect to get from a car this fast.

Is a BMW 135i reliable?

Severity. The probability of a repair being a severe or major issue is 18% for the BMW 135i, compared to an average of 11% for luxury compact cars and 12% for all vehicle models. The average total annual cost for unscheduled repairs and maintenance across all model years of a vehicle.

Is the 135i a good daily driver?

It's very usable from day to day and makes manoeuvres such as overtakes incredibly safe and simple. By holding down the left shift paddle you can automatically downshift to the appropriate gear for a burst of maximum performance.

What is the top speed of a 135i 2008?

Top speed will be limited to 155. Pocket rocket? More like musclecar. For a small two-door-8.9 inches shorter end to end, 1.4 narrower, and 0.3 taller than the 335 coupe, with a 4.0-inch-stubbier wheelbase-the 135 puts up big numbers, placing it in the same ballpark, ironically, as the aforementioned Bullitt.

What fails on N54?

Turbocharger Failure / Wastegate Rattle

Symptoms include reduced power, black smoke from the exhaust, and a grinding noise from the engine. The wastegate may also rattle, which has become a bit of a notorious issue for older N54 engines. To resolve this issue, the turbocharger needs to be replaced.