Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISMAINTENANCETECHNICAL SERVICE BULLETINS
1991 Hyundai Sonata V6-3.0L
Maintenance: Technical Service Bulletins
1991 Hyundai Sonata V6-3.0LSECTION Technical Service Bulletins
- Customer Interest
- By Symptom
- All Technical Service Bulletins
- Battery - Maintenance/Charging/Diagnostics/Replacement
- Engine - Knocking Noise When Using Non-OE Oil Filter
- VIN - Identification Decoder
- Tires/Alignment/Suspension/Brakes - Vehicle Pull
- Specifications - Changes and Corrections
- A/T - Harsh 4-3 Downshift When Decelerating
- Timing Belt/Oil Pump Sprocket - Improved Design
- Radiator/Radiator Hose - Coolant Leaks
- Wheels/Tires - Vibration Diagnosis and Repair
- Tires/Aluminum Wheels - Slow Air Leaks
- Tires - Irregular Rear Tire, Rotation Recommendations
- Tires - Flat Spotting During Storage
- Tires - Manufacturer List
- Tires - Defect Inspection Procedures
- Wheel Lug Nut - Service Tips for Properly Torquing
- Wheels - Lug Nut Torqueing Service Tips
- Engine Fault Code - Diagnostic Manual Correction
- Brakes - Vibration
- Engine Oil Filter - Improved Design
- Engine - Oil Filter Information/Applications
- Engine - Cold Starting Precautions
- Vehicle Identification Number - Decoder
- Vehicle Identifiication Number - Decoder
- Diagnostic Scanner - Parts Replacement Numbers
- Engine Performance - Misfire Code Diagnosis
- Diagnostic System Adapter Cables - Ordering
- Engine - Oil Selection Recommendations
- Engine Oil - New and Long Term Storage
- A/T - 2-3 Shift Flare or Shift Shudder
- Engine - Accessory Drive Belt Tension
- A/T - Fluid Precautions/Recommendations
- A/T - Fluid, Severe Service Interval Revision
- A/C - R12 Replacement Recommendations
- M/T - Revised Fluid Specification
- M/T - Gear Lubricant Applications/Interchangeability
- A/C - Cabin Air Filter Application Chart
- Basic Ignition Timing - Procedure
- Alignment Specifications - Conversion Chart
- Wheel Alignment - Corrected Specifications
- Towing - M/T Requirements
- Vehicle - Towing Requirements and Precautions
- Vehicle - RV Towing Guidelines/Precautions
- Vehicle - Perchlorate Material Handling/Disposal
- A/T - Automatic Transaxle Fluid Level
- Power Steering - PSF-4 Fluid Compatibility/Part Number
- Wheels/Tires - Steering Wheel Shimmy/Vibration
- Steering/Suspension - Drift/Pull Diagnosis/Repair
- Wheels - Aluminum Wheel Cleaning And Maintenance
- A/T - Specified ATF and Additive Usage Information
- Brakes - Brake Fluid Adding/Changing Precautions
- Vehicle - 2WD Vehicle Towing Information
- Engine - Knocking Noise When Using Aftermarket Oil Filters
- Vehicle - Reduced Load Capacity Label Compliance Info.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.