2021 BMW 840i

2021 BMW 840i

The 2021 BMW 840i is a luxury sports car offered with a 3.0-liter inline-six engine producing 335 horsepower and 368 lb-ft of torque. It comes standard with an eight-speed automatic transmission and rear-wheel drive. Other engine and transmission options include a 4.4-liter V8 with 523 horsepower and 553 lb-ft of torque and an eight-speed automatic transmission with all-wheel drive.

Owners of the 2021 BMW 840i generally praise its powerful engine, stylish design, and luxurious interior. However, there have been some reported issues with the vehicle.

Engine

• 3.0-liter inline-six engine
  • Intake valve deposits
    • Description/Symptoms: Carbon buildup on the intake valves can cause reduced engine performance, rough idling, and increased fuel consumption.
    • Solution: Clean or replace the intake valves.
    • Estimated Cost to Fix: $500 - $1,000+
    • Recalls: None Found
• 4.4-liter V8 engine
  • Timing chain tensioner failure
    • Description/Symptoms: A faulty timing chain tensioner can lead to a stretched timing chain, resulting in engine damage.
    • Solution: Replace the timing chain and tensioner.
    • Estimated Cost to Fix: $2,000 - $3,000+
    • Recalls: None Found

Transmission

• Eight-speed automatic transmission
  • Torque converter shudder
    • Description/Symptoms: The torque converter can vibrate when the transmission is shifting gears, causing a shuddering sensation.
    • Solution: Replace the torque converter.
    • Estimated Cost to Fix: $1,500 - $2,000+
    • Recalls: None Found

Suspension

• Rear suspension
  • Air suspension failure
    • Description/Symptoms: The air suspension system can fail, causing the vehicle to sag or ride too low.
    • Solution: Replace the air suspension components.
    • Estimated Cost to Fix: $1,000 - $2,000+
    • Recalls: None Found

Electrical

• Electrical system
  • Battery discharge
    • Description/Symptoms: The battery can discharge prematurely, leaving the vehicle unable to start.
    • Solution: Diagnose and repair the electrical system.
    • Estimated Cost to Fix: $500 - $1,000+
    • Recalls: None Found

Exterior

• No Issues Found

Interior

• Infotainment system
  • Navigation system glitches
    • Description/Symptoms: The navigation system can experience occasional glitches, causing it to freeze or display incorrect directions.
    • Solution: Update the navigation system software.
    • Estimated Cost to Fix: $0 (under warranty)
    • Recalls: None Found
• Climate control system
  • Air conditioning compressor failure
    • Description/Symptoms: The air conditioning compressor can fail, resulting in a loss of cooling.
    • Solution: Replace the air conditioning compressor.
    • Estimated Cost to Fix: $1,000 - $1,500+
    • Recalls: None Found

Summary

The 2021 BMW 840i is a powerful and stylish luxury sports car, but it has experienced some issues, particularly with the engine and transmission. The severity of the issues varies, and the cost to fix them can be significant. Potential buyers should be aware of these issues and factor them into their purchasing decision.