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2004 BMW 320i

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By Research the Car 5 min read

Here’s a breakdown of common issues and complaints for the 2004 BMW 320i, formatted for your website.

The 2004 BMW 320i is part of the E46 generation. While offering a blend of sporty handling and premium features, it also has a reputation for some common problems as it ages. The 320i was equipped with a 2.2L inline-six cylinder engine producing approximately 170 horsepower and 150 lb-ft of torque. Other engine options available in the E46 range, depending on the market, included smaller displacement inline-four and six-cylinder engines, as well as larger, more powerful options like the 3.0L inline-six in the 330i. Transmission choices included a 5-speed manual and a 5-speed automatic. People generally like the E46’s balanced driving dynamics, classic BMW styling, and relatively compact size. Dislikes often center around the higher maintenance costs associated with owning a BMW and the age-related issues that surface on older models.

Engine

2.2L Inline-Six (M54B22)

  • Oil Leaks
    • Description/Symptoms: Oil leaks are common from various locations, including the valve cover gasket, oil filter housing gasket, and oil pan gasket. Symptoms include visible oil leaks, burning oil smell, and low oil level.
    • Solution: Replace the leaking gasket or seal.
    • Estimated Cost to Fix: $150 - $500+ depending on the location and labor.
    • Recalls: None Found
  • Cooling System Issues
    • Description/Symptoms: The cooling system is prone to failures, including radiator leaks, expansion tank cracks, and water pump failures. Overheating is a primary symptom.
    • Solution: Replace the faulty component (radiator, expansion tank, water pump, thermostat). It’s often recommended to replace multiple components at once as preventative maintenance.
    • Estimated Cost to Fix: $200 - $800+ depending on the parts replaced.
    • Recalls: None Found
  • DISA Valve Failure
    • Description/Symptoms: The DISA (Differential Air Intake System) valve can fail, leading to rough idle, loss of power, and a rattling noise from the engine.
    • Solution: Replace the DISA valve. Some aftermarket options offer improved durability.
    • Estimated Cost to Fix: $200 - $400
    • Recalls: None Found
  • VANOS Issues
    • Description/Symptoms: The VANOS (variable valve timing) system can experience problems, leading to rough idling, loss of power, and decreased fuel economy.
    • Solution: Replacing VANOS seals, cleaning VANOS solenoids, or replacing the VANOS unit.
    • Estimated Cost to Fix: $250 - $1000+ depending on the severity and repair method.
    • Recalls: None Found

Transmission

5-Speed Automatic (GM A5S390R / ZF 5HP19)

  • Transmission Slippage/Rough Shifting
    • Description/Symptoms: The automatic transmission can experience slippage, rough or delayed shifting, especially as the fluid ages.
    • Solution: Initially, a transmission fluid flush and filter change may help. If the problem persists, more extensive repairs or a transmission rebuild might be necessary.
    • Estimated Cost to Fix: Fluid change: $150 - $300. Rebuild/Replacement: $2000 - $4000+
    • Recalls: None Found
  • Torque Converter Failure
    • Description/Symptoms: The torque converter can fail, leading to shuddering, stalling, or complete loss of drive.
    • Solution: Replace the torque converter.
    • Estimated Cost to Fix: $800 - $1500
    • Recalls: None Found

5-Speed Manual (Getrag S5D 250 G)

  • Clutch Failure
    • Description/Symptoms: The clutch can wear out over time, leading to slipping, difficulty shifting, or complete failure.
    • Solution: Replace the clutch kit (clutch disc, pressure plate, throw-out bearing).
    • Estimated Cost to Fix: $600 - $1200
    • Recalls: None Found

Suspension

  • Control Arm Bushing Failure
    • Description/Symptoms: The control arm bushings wear out, leading to clunking noises, vibrations, and imprecise steering.
    • Solution: Replace the control arm bushings or the entire control arm assembly.
    • Estimated Cost to Fix: Bushings only: $150 - $400. Control arm assembly: $300 - $600+ per side.
    • Recalls: None Found
  • Strut Mount Failure
    • Description/Symptoms: The strut mounts can crack or fail, leading to noises and poor handling.
    • Solution: Replace the strut mounts.
    • Estimated Cost to Fix: $200 - $500+ per pair.
    • Recalls: None Found

Electrical

  • Window Regulator Failure
    • Description/Symptoms: The window regulators are prone to failure, causing the windows to become stuck or inoperative.
    • Solution: Replace the window regulator.
    • Estimated Cost to Fix: $200 - $400 per window.
    • Recalls: None Found
  • Instrument Cluster Pixel Loss
    • Description/Symptoms: Pixels in the instrument cluster can fade or disappear, making it difficult to read information.
    • Solution: Repair or replace the instrument cluster. Repair is often cheaper.
    • Estimated Cost to Fix: Repair: $150 - $300. Replacement: $500 - $1000+
    • Recalls: None Found
  • Sensor Failures
    • Description/Symptoms: Oxygen sensors, mass airflow sensors, and camshaft position sensors can fail, leading to poor engine performance, check engine lights, and reduced fuel economy.
    • Solution: Replace the faulty sensor.
    • Estimated Cost to Fix: $100 - $300+ per sensor, depending on location and type.
    • Recalls: None Found

Exterior

  • Rust (especially around wheel wells and rocker panels)
    • Description/Symptoms: Rust formation, particularly in areas prone to moisture and road salt exposure.
    • Solution: Rust repair, body panel replacement, and repainting.
    • Estimated Cost to Fix: $300 - $2000+ depending on severity and location.
    • Recalls: None Found
  • Headlight Lens Yellowing/Hazing
    • Description/Symptoms: The plastic headlight lenses can become yellowed and hazed over time, reducing headlight output.
    • Solution: Polish and clear coat the lenses or replace the headlights.
    • Estimated Cost to Fix: Polishing: $50 - $150. Replacement: $300 - $800+ per pair.
    • Recalls: None Found

Interior

  • Dashboard Cracking
    • Description/Symptoms: Cracks can develop in the dashboard, particularly in areas exposed to sunlight.
    • Solution: Dashboard replacement or repair (covering with a dash mat is a common, cheaper workaround).
    • Estimated Cost to Fix: Repair/Cover: $100 - $300. Replacement: $1000+
    • Recalls: None Found
  • Loose Interior Trim
    • Description/Symptoms: Some interior trim pieces, such as door panels and center console trim, can become loose or detached over time.
    • Solution: Reattach or replace the trim pieces.
    • Estimated Cost to Fix: $50 - $200+ depending on the piece and complexity.
    • Recalls: None Found

Summary

The 2004 BMW 320i, while enjoyable to drive, is prone to several common issues due to its age and the inherent design of certain components. Engine oil leaks and cooling system failures are particularly prevalent and can lead to significant repair costs if not addressed promptly. Electrical problems, especially with window regulators and instrument cluster pixels, are also common. While some repairs are relatively inexpensive, others, such as transmission rebuilds or extensive rust repair, can be costly. Potential buyers should be aware of these potential issues and factor them into their purchasing decision and budget for ongoing maintenance.

BMW, 320i
BMW 320i 2004
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