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Bmw 135i Problems

The BMW 135i was a high-performance compact coupe and convertible produced from 2008 to 2013, featuring the twin-turbocharged N54 and later N55 inline-six engines producing 300+ horsepower. With 394 complaints recorded, issues concentrated in the 2008 first model year. The 135i packed serious performance into a small, nimble package, earning enthusiast praise for its driving dynamics. However, the N54 engine's complexity brought reliability challenges that require informed ownership.

394
Total Complaints
26
Total Recalls
7
Model Years
0
Reported Deaths
✓

Best Years

These years have the fewest reported problems.

2007

Common Problem Categories

Air Bags 74
Fuel System, Gasoline 64
Engine 58
Electrical System 38
Fuel/propulsion System 34

Complaints by Model Year

All Model Years

Year ↓ Complaints Recalls Crashes Fires Rating
2013 32 2 0 2 Average
2012 70 6 0 0 Average
2011 68 6 2 4 Average
2010 32 4 2 0 Average
2009 68 4 0 0 Average
2008 122 4 6 4 Below Average
2007 2 0 0 0 Good

Bmw 135i Years to Avoid

The 2008 135i accumulated the most complaints with N54 high-pressure fuel pump failures, turbo wastegate rattles, injector failures, and water pump issues. The 2009-2010 N54 models shared many concerns. Carbon buildup on intake valves required expensive cleaning every 50,000-70,000 miles.

Best Bmw 135i Years

The 2007 135i doesn't exist (2008 was launch year). The 2011-2013 models with the N55 single-turbo engine offer improved reliability over N54 versions. The 2013 final year with N55 represents the most refined choice. Any 135i needs documented maintenance history.

Frequently Asked Questions

Is the 135i reliable?

N55 models (2011+) are more reliable than N54 versions. All 135i models require attentive maintenance. The N54's tuning potential attracts owners who stress the drivetrain. Reliability depends heavily on maintenance history.

What's the difference between N54 and N55?

The N54 uses twin turbos; the N55 uses one twin-scroll turbo. Both make similar power, but the N55 eliminated N54 failure points like the high-pressure fuel pump and injectors. N55 is the better reliability choice.

What are common 135i problems?

N54: fuel pump, injectors, turbos, water pump, carbon buildup. N55: valve cover, oil filter housing gasket. Both need regular maintenance. Budget $2,000-3,500 annually for proper care.

Is the 135i a future classic?

Possibly. The combination of rear-drive, manual transmission, and turbocharged inline-six in a small coupe is increasingly rare. Clean, low-mile examples with documented history may appreciate. Modified cars will not.

135i vs M3: which should I buy?

The M3's naturally-aspirated V8 revs higher and sounds better. The 135i's turbo six has more low-end torque and better fuel economy. The 135i costs significantly less. For pure driving, the M3 wins. For value, the 135i.