1991 INFINITI M30

Introduction:

The 1991 INFINITI M30 was a luxurious sedan known for its smooth ride, spacious interior, and powerful engine. Available with two engine options and only one transmission option, the vehicle offered a comfortable and refined driving experience.

Engine

• VG30E 3.0L V6
• Valve Cover Gasket Leak: Creates an oil leak around the engine; common issue on high-mileage vehicles
• Solution: Replace valve cover gasket
• Estimated Cost to Fix: $300 - $600+
• Timing Belt and Water Pump Failure: Can cause severe engine damage if not replaced on schedule
• Solution: Replace timing belt and water pump
• Estimated Cost to Fix: $600 - $1,000+
• Crankshaft Position Sensor Failure: Difficulty starting the vehicle; may cause engine to stall
• Solution: Replace crankshaft position sensor
• Estimated Cost to Fix: $200 - $400+
• VG30DE 3.0L DOHC V6
• No Issues Found

Transmission

• 4-Speed Automatic
• Shifting Problems: Transmission slips or shifts harshly; caused by worn transmission components
• Solution: Repair or overhaul transmission
• Estimated Cost to Fix: $1,500 - $3,000+

Suspension

• Front Strut Mounts Worn: Loose handling and clunking noises
• Solution: Replace strut mounts
• Estimated Cost to Fix: $400 - $800+
• Rear Shock Absorbers Leaking: Compromises ride quality and handling
• Solution: Replace rear shock absorbers
• Estimated Cost to Fix: $400 - $800+

Electrical

• Alternator Failure: Powers the electrical system; can cause battery drain and starting issues
• Solution: Replace alternator
• Estimated Cost to Fix: $500 - $1,000+
• Starter Solenoid Malfunction: Vehicle won’t start; often caused by worn contacts
• Solution: Replace starter solenoid
• Estimated Cost to Fix: $200 - $400+

Exterior

• No Issues Found

Interior

• Sunroof Cassette Failure: Cassette becomes noisy or jams; may cause water leaks
• Solution: Replace sunroof cassette
• Estimated Cost to Fix: $1,000 - $2,000+

Summary:

Overall, the 1991 INFINITI M30 is a solid and reliable vehicle with a few common issues that arise with age and mileage. The most severe and costly issue is transmission repair, which can be expensive if not addressed promptly. The other issues are generally minor and relatively inexpensive to fix.