2016 BMW 420i

Introduction

The 2016 BMW 420i is a compact luxury sports coupe that offers a thrilling driving experience. It features a turbocharged 2.0-liter four-cylinder engine that produces 180 horsepower and 199 lb-ft of torque. The 420i is available with either a six-speed manual or an eight-speed automatic transmission. Despite its impressive performance, the 420i has received some criticism for its cramped interior and limited cargo space.

Engine

2.0-liter Turbocharged Four-Cylinder

• Oil Leaks: Seals and gaskets can fail, causing oil leaks. Symptoms include smoke from the engine bay, low oil levels, and an illuminated check engine light. Replacing the seals and gaskets fixes the issue. $500 - $1,000+
• Timing Chain Issues: The timing chain can stretch or break prematurely, disrupting engine timing. Symptoms include rough idling, decreased power, and an illuminated check engine light. Replacing the timing chain and related components resolves the problem. $2,000 - $5,000+
• Fuel Injector Failure: Fuel injectors can fail, leading to poor fuel delivery and engine performance issues. Symptoms include misfires, rough idling, and decreased fuel economy. Replacing the faulty injectors restores engine function. $300 - $600+
• Turbocharger Problems: The turbocharger can fail due to oil starvation or internal damage. Symptoms include reduced power, increased exhaust smoke, and an illuminated check engine light. Replacing the turbocharger restores performance. $1,500 - $3,000+

Transmission

Six-Speed Manual

• No Issues Found

Eight-Speed Automatic

• Transmission Slipping: The transmission may slip between gears, causing a loss of power and erratic shifting. Symptoms include delayed gear changes, hesitations, and a burning smell. Replacing the transmission fluid and filters may alleviate the issue. If not, a transmission rebuild or replacement may be necessary. $2,500 - $5,000+
• Mechatronic Unit Failure: The mechatronic unit, which controls transmission operation, can malfunction. Symptoms include harsh shifting, gear slipping, and a loss of power. Replacing the mechatronic unit is the solution. $1,500 - $2,500+

Suspension

• Front Control Arm Bushing Failure: Worn or torn control arm bushings can lead to poor handling, uneven tire wear, and a rattling noise. Replacing the bushings restores suspension performance. $500 - $1,000+
• Rear Shock Absorber Failure: Failed shock absorbers can result in a bouncy ride, reduced stability, and premature tire wear. Replacing the shocks improves handling and comfort. $700 - $1,500+

Electrical

• Battery Discharge: The battery can discharge prematurely due to a faulty alternator or parasitic drain. Symptoms include difficulty starting the engine, flickering headlights, and a dead battery. Replacing the alternator or investigating the parasitic drain resolves the issue. $500 - $2,000+
• Electrical Component Failures: Various electrical components, such as sensors, modules, or wiring, can fail. Symptoms vary depending on the affected component. Diagnosis and repair is necessary to restore functionality. $100 - $1,500+

Exterior

• No Issues Found

Interior

• Seat Heater Malfunctions: The seat heaters may not function properly due to failed heating elements or faulty switches. Symptoms include lack of heat or inconsistent heating. Replacing the heating elements or switches fixes the issue. $500 - $1,000+
• Infotainment System Bugs: The infotainment system may experience software glitches, such as freezes, crashes, or connectivity issues. Software updates can resolve these bugs. None Found
• Climate Control Issues: The climate control system may malfunction, causing improper heating or cooling. Diagnosis and repairs depend on the specific issue. $500 - $1,500+

Summary

While the 2016 BMW 420i offers an exciting driving experience, it has experienced various issues, including engine leaks, transmission problems, suspension failures, and electrical malfunctions. The severity and cost of these issues can vary, but they can significantly impact the reliability and ownership costs of the vehicle. It is recommended to perform regular maintenance and address any issues promptly to avoid further damage or costly repairs.