1999 Porsche 911

Introduction:

The 1999 Porsche 911 is a high-performance sports car known for its exceptional handling, powerful engines, and iconic design. It was offered with several engine and transmission options including:

• 3.4L flat-six engine (296 hp, 258 lb-ft torque)
• 3.6L flat-six engine (300 hp, 266 lb-ft torque)
• 3.8L flat-six engine (320 hp, 273 lb-ft torque)
• 6-speed manual transmission
• 5-speed Tiptronic automatic transmission

Despite its popularity and reputation, the 1999 Porsche 911 has had its share of issues reported by owners.

Engine

• 3.4L Flat-Six
  • IMS Bearing Failure:
    • Description/Symptoms: The intermediate shaft (IMS) bearing can fail, causing catastrophic engine damage. Symptoms include metallic grinding noises and loss of oil pressure.
    • Solution: Replace the IMS bearing with a reinforced version.
    • Estimated Cost to Fix: $3,000 - $5,000+
  • Bore Scoring:
    • Description/Symptoms: The engine’s cylinder bores can become scored, leading to loss of compression and power. Symptoms include increased oil consumption and blue smoke from the exhaust.
    • Solution: Rebore the cylinders or replace the engine.
    • Estimated Cost to Fix: $3,000 - $10,000+
• 3.6L Flat-Six
  • No Issues Found
• 3.8L Flat-Six
  • No Issues Found

Transmission

• 6-Speed Manual
  • Synchros Can Wear Out:
    • Description/Symptoms: The synchronizers can experience premature wear, causing difficulty shifting gears. Symptoms include grinding noises and a resistant feel when changing gears.
    • Solution: Replace the worn synchronizers.
    • Estimated Cost to Fix: $600 - $1,500
  • Clutch Can Fail:
    • Description/Symptoms: The clutch can become worn or damaged, leading to slipping or inability to engage gears. Symptoms include difficulty shifting, a burning smell, or shuddering during acceleration.
    • Solution: Replace the clutch assembly.
    • Estimated Cost to Fix: $1,000 - $2,000
• 5-Speed Tiptronic Automatic
  • Valve Body Issues:
    • Description/Symptoms: The valve body can develop issues, causing erratic shifting, delays, or complete failure of the transmission. Symptoms include harsh shifts, limp mode, or no engagement of gears.
    • Solution: Repair or replace the valve body.
    • Estimated Cost to Fix: $1,500 - $3,000

Suspension

• Front Control Arm Bushings:
  • Description/Symptoms: The front control arm bushings can wear out or tear, leading to poor handling, increased road noise, and uneven tire wear. Symptoms include a clunking sound from the suspension, vibration, and difficulty maintaining alignment.
  • Solution: Replace the worn bushings.
  • Estimated Cost to Fix: $500 - $1,000

Electrical

• Alternator Failure:
  • Description/Symptoms: The alternator can fail, leading to a loss of electrical power. Symptoms include dim headlights, electrical accessories not working, and difficulty starting the engine.
  • Solution: Replace the alternator.
  • Estimated Cost to Fix: $600 - $1,000
• Window Regulators:
  • Description/Symptoms: The window regulators can experience mechanical failure, causing the windows to become inoperable or fall into the door. Symptoms include windows not rolling up or down smoothly, or becoming stuck in an open position.
  • Solution: Replace the faulty window regulator.
  • Estimated Cost to Fix: $400 - $1,000

Exterior

• Condensation in Headlights:
  • Description/Symptoms: Moisture can accumulate inside the headlights, causing fogging or condensation. This can affect visibility and the functionality of the headlights.
  • Solution: Replace the affected headlight assembly.
  • Estimated Cost to Fix: $1,000 - $2,000

Interior

• Sunroof Drain Plugs:
  • Description/Symptoms: The sunroof drain plugs can become clogged or damaged, allowing water to leak into the interior of the car. Symptoms include water stains on the headliner, musty odors, and electronic malfunctions.
  • Solution: Clean or replace the drain plugs.
  • Estimated Cost to Fix: $200 - $500
• Power Seat Motors:
  • Description/Symptoms: The power seat motors can fail, causing the seats to become inoperable or stuck in one position. Symptoms include difficulty adjusting the seat position or a burning smell.
  • Solution: Replace the faulty motor.
  • Estimated Cost to Fix: $400 - $900

Summary:

While the 1999 Porsche 911 is a desirable sports car, potential owners should be aware of the potential issues listed above. The severity and cost of these issues can vary depending on the specific problem and the condition of the vehicle. Some issues, such as the IMS bearing failure, can be catastrophic and expensive to repair. It is recommended to have any potential purchase inspected by a qualified mechanic before committing to buy.