2016 BMW M135i

Here’s a breakdown of common issues reported for the 2016 BMW M135i, categorized as requested.

The 2016 BMW M135i is a sporty hatchback known for its powerful engine and engaging driving dynamics. It comes equipped with a 3.0-liter inline-6 turbocharged engine, producing 322 horsepower and 332 lb-ft of torque. Other engines offered in this generation of the BMW 1 Series, depending on the market, included a range of petrol and diesel options, such as the 116i, 118i, 120i, 116d, 118d, 120d, and 125d, with varying power outputs. While owners appreciate the M135i’s performance and handling, common complaints revolve around reliability issues and relatively firm ride quality.

Engine

3.0L Inline-6 Turbocharged (N55B30)

• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leaks from the oil filter housing, resulting in oil drips under the car and a burning oil smell. Can lead to low oil levels if left unchecked.
  • Solution: Replacement of the oil filter housing gasket.
  • Estimated Cost to Fix: $300 - $500+
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: Oil leak on the side of the engine, with the same drips and smells.
  • Solution: Replacement of the valve cover gasket
  • Estimated Cost to Fix: $300 - $500+
  • Recalls: None Found
• VANOS Solenoid Issues
  • Description/Symptoms: Rough idling, decreased performance, and potential engine stalling. Diagnostic trouble codes (DTCs) related to VANOS system.
  • Solution: Replacement of faulty VANOS solenoids.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• Charge Pipe Failure
  • Description/Symptoms: Loss of power, “check engine” light illuminated. Often a crack or complete failure of the plastic charge pipe connecting the turbocharger to the intercooler.
  • Solution: Replacement of the charge pipe, often with an aftermarket aluminum version for increased durability.
  • Estimated Cost to Fix: $150 - $400+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Mechatronic Sleeve Leaks
  • Description/Symptoms: Transmission fluid leaks from the mechatronic unit sleeve, leading to potential transmission slipping or failure.
  • Solution: Replacement of the mechatronic sleeve. Requires dropping the transmission pan and refilling fluid.
  • Estimated Cost to Fix: $400 - $700+
  • Recalls: None Found
• Rough Shifting or Hesitation
  • Description/Symptoms: Jerky or delayed shifts, particularly at lower speeds. May also be accompanied by unusual noises.
  • Solution: Often remedied by a transmission fluid flush and filter replacement. In more severe cases, valve body issues may require repair or replacement.
  • Estimated Cost to Fix: $300 - $1500+ (depending on severity)
  • Recalls: None Found

Suspension

• Cracked Coil Springs
  • Description/Symptoms: Popping, creaking, or knocking noises from the suspension, uneven ride height, and compromised handling.
  • Solution: Replacement of cracked or broken coil springs. Recommended to replace in pairs.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found
• Damper (Shock Absorber) Failure
  • Description/Symptoms: Bouncy or unstable ride, excessive body roll during cornering, leaking fluid from the dampers.
  • Solution: Replacement of faulty dampers. Recommended to replace in pairs.
  • Estimated Cost to Fix: $400 - $1000+
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: The car struggles to start after being parked for a short period, or the battery dies prematurely.
  • Solution: Diagnose and address parasitic drain (e.g., faulty comfort access module, aftermarket electronics). Battery replacement may also be necessary.
  • Estimated Cost to Fix: $100 - $500+ (depending on the source of the drain)
  • Recalls: None Found
• Faulty Window Regulators
  • Description/Symptoms: Windows failing to operate smoothly, making grinding noises, or falling into the door.
  • Solution: Replacement of faulty window regulator.
  • Estimated Cost to Fix: $250 - $500+
  • Recalls: None Found

Exterior

• Rust on Brake Rotors
  • Description/Symptoms: After long periods of time sitting, such as after getting the car washed, there is surface rust on the brake rotors
  • Solution: Simply driving the car will remove the rust from the rotors. However, the rust will form again.
  • Estimated Cost to Fix: $0
  • Recalls: None Found

Interior

• Sticking iDrive Controller
  • Description/Symptoms: The iDrive controller knob becoming sticky or difficult to rotate/press.
  • Solution: Cleaning the controller mechanism or replacing the controller unit.
  • Estimated Cost to Fix: $50 - $500+ (depending on the fix)
  • Recalls: None Found

Summary

The 2016 BMW M135i offers a thrilling driving experience, but potential buyers should be aware of common issues. Engine oil leaks, transmission problems, and suspension wear are typical concerns. Electrical issues can also arise, especially battery drain. While some repairs are relatively inexpensive, others, such as valve body repair in the transmission, can be costly. Potential buyers should get a pre-purchase inspection from a qualified BMW mechanic to assess the vehicle’s condition.