2004 BMW 645Ci

Introduction:

The 2004 BMW 645Ci is a luxury grand tourer that delivers impressive performance and a comfortable driving experience. It features a powerful 4.4-liter V8 engine that produces 325 horsepower and 330 lb-ft of torque, paired with a 6-speed manual or 6-speed automatic transmission. Known for its sleek design, responsive handling, and comfortable interior, the 645Ci has also garnered some criticism for potential reliability concerns.

Engine

4.4L V8 with 6-speed Manual Transmission

• Valve Stem Seal Failure: Oil consumption, blue smoke from exhaust, rough idle
  • Solution: Replace valve stem seals
  • Estimated Cost to Fix: $1,500 - $2,500+
  • Recalls: None Found

4.4L V8 with 6-speed Automatic Transmission

• Vanos Solenoid Malfunction: Engine performance loss, rough idle, stalling
  • Solution: Replace Vanos solenoids
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: None Found
• Oil Filter Housing Gasket Leak: Oil leak around the oil filter housing
  • Solution: Replace oil filter housing gasket
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

Transmission

6-speed Manual Transmission

• Transmission Fluid Leak: Fluid leaking from the transmission housing
  • Solution: Replace transmission fluid seals
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found
• Grinding Noises When Shifting: Difficult to shift gears, grinding noises
  • Solution: Replace or repair worn transmission components
  • Estimated Cost to Fix: $1,200 - $2,500+
  • Recalls: None Found

6-speed Automatic Transmission

• Solenoid Pack Failure: Transmission slipping, hard shifting, delayed engagement
  • Solution: Replace solenoid pack
  • Estimated Cost to Fix: $1,500 - $2,500+
  • Recalls: None Found
• Mechatronic Unit Failure: Transmission erratic behavior, loss of gears
  • Solution: Replace mechatronic unit
  • Estimated Cost to Fix: $4,000 - $6,000+
  • Recalls: None Found

Suspension

• Front Control Arm Bushing Failure: Worn bushings, clunking noises when turning
  • Solution: Replace control arm bushings
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Rear Shock Absorber Failure: Leaking shocks, reduced ride quality
  • Solution: Replace rear shock absorbers
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found

Electrical

• Battery Discharge: Battery drains prematurely
  • Solution: Check for parasitic draw, replace battery if necessary
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Alternator Failure: Battery not charging, electrical system issues
  • Solution: Replace alternator
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found

Exterior

• Hood Struts Failure: Struts weaken, hood does not stay open
  • Solution: Replace hood struts
  • Estimated Cost to Fix: $100 - $200+
  • Recalls: None Found

Interior

• HVAC Blower Motor Failure: Blower not working, no airflow
  • Solution: Replace blower motor
  • Estimated Cost to Fix: $300 - $500+
  • Recalls: None Found
• Navigation System Malfunction: Navigation screen freezing, incorrect directions
  • Solution: Update or replace navigation unit
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Summary:

The 2004 BMW 645Ci offers impressive performance and comfort, but it has some potential reliability concerns. Engine and transmission issues can be costly to fix, and suspension, electrical, and interior issues can also impact the driving experience. It’s important for potential buyers to be aware of these issues and consider the potential repair costs before purchasing a used 645Ci.