2012 BMW 120i

Here’s a breakdown of common issues and complaints for the 2012 BMW 120i, categorized as requested. The 2012 BMW 120i is a rear-wheel-drive hatchback known for its sporty handling and premium features. In addition to the 2.0L inline-4 petrol engine, the 120i was also available with other engine options, including more powerful petrol engines such as the 125i with its 2.0L inline-4 and diesel engines like the 118d and 120d. The 2.0L petrol in the 120i produces around 125-170 horsepower and 155-184 lb-ft of torque depending on trim and tune. People generally like the 120i for its engaging driving experience, compact size, and relatively fuel-efficient engines. Common dislikes include the firm ride, especially on sport suspension, and potentially high maintenance costs associated with BMW ownership.

Engine

2.0L N46/N43 Inline-4 Petrol

• Oil Leaks
  • Description/Symptoms: Oil leaks from the valve cover gasket, oil filter housing gasket, or oil pan gasket. Symptoms include oil spots under the car, a burning oil smell, and low oil levels.
  • Solution: Replace the leaking gasket or seal.
  • Estimated Cost to Fix: $200 - $800+ depending on the location and complexity of the repair.
  • Recalls: None Found
• VANOS Solenoid Issues
  • Description/Symptoms: Faulty VANOS (Variable Valve Timing) solenoids can cause rough idling, poor performance, and a check engine light.
  • Solution: Replace the faulty VANOS solenoid(s).
  • Estimated Cost to Fix: $200 - $400 per solenoid, plus labor.
  • Recalls: None Found
• Ignition Coil Failure
  • Description/Symptoms: Misfires, rough running, reduced power and a check engine light could indicate a faulty ignition coil.
  • Solution: Replace the faulty ignition coil(s). It is often recommended to replace all ignition coils at once to ensure consistent performance.
  • Estimated Cost to Fix: $100 - $300+ depending on if one or all need replacement
  • Recalls: None Found

Transmission

6-Speed Manual / 6-Speed Automatic

• Rough Shifting (Automatic)
  • Description/Symptoms: Jerky or delayed shifts, particularly when cold.
  • Solution: Fluid change is the first step. If that doesn’t work, valve body issues or worn clutches may require a transmission rebuild or replacement.
  • Estimated Cost to Fix: $100 - $300 for fluid change, $500 - $1500 for valve body repair, $3000+ for rebuild or replacement.
  • Recalls: None Found

Suspension

• Front Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the front suspension, vague steering, and uneven tire wear.
  • Solution: Replace the worn control arm bushings. Replacing the entire control arm is often recommended.
  • Estimated Cost to Fix: $300 - $600+ per side, including labor.
  • Recalls: None Found
• Rear Subframe Bushing Failure
  • Description/Symptoms: Rear end feels loose, clunking noises over bumps, and potential handling issues.
  • Solution: Replace the worn rear subframe bushings.
  • Estimated Cost to Fix: $500 - $1000+ including labor, as this is a more involved job.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Car battery repeatedly dying, especially after sitting for a short period.
  • Solution: Diagnose the source of the parasitic drain. This could be a faulty module (e.g., infotainment, comfort access), or a wiring issue.
  • Estimated Cost to Fix: $100 - $1000+, depending on the source and complexity of the issue. Diagnosis alone can be expensive.
  • Recalls: None Found
• Faulty Door Lock Actuators
  • Description/Symptoms: Doors not locking or unlocking properly, requiring manual operation.
  • Solution: Replace the faulty door lock actuator.
  • Estimated Cost to Fix: $200 - $400 per door, including labor.
  • Recalls: None Found

Exterior

• Rust on Door Sills/Wheel Arches
  • Description/Symptoms: Surface rust appearing on door sills or wheel arches, particularly in areas with harsh winters and road salt.
  • Solution: Sand down the rust, treat the area, and repaint.
  • Estimated Cost to Fix: $200 - $500+ per area, depending on the severity of the rust.
  • Recalls: None Found

Interior

• Sticking Buttons on the Radio or iDrive Controller
  • Description/Symptoms: Buttons on the radio or iDrive controller become sticky or unresponsive.
  • Solution: Cleaning the affected buttons with isopropyl alcohol can sometimes help. Otherwise, the unit may need to be replaced.
  • Estimated Cost to Fix: $20 - $50 for cleaning supplies, $300 - $1000+ for replacing the unit.
  • Recalls: None Found

Summary

The 2012 BMW 120i can be a fun and rewarding car to own, but like many European vehicles, it can be prone to certain issues. The most common problems revolve around oil leaks from various engine gaskets, VANOS solenoid issues, suspension component wear, and electrical issues. Rust can also be a concern in certain climates. The severity and cost of these issues can vary greatly depending on the specific problem and the extent of the damage. Addressing these issues promptly is important to maintain the vehicle’s performance, reliability, and value. Overall, potential buyers should factor in the possibility of these repairs when considering a 2012 BMW 120i.