What type of fuel should I use in my 1999 Volvo S80?

The 1999 S80 requires unleaded premium gasoline with an octane rating of AKI 91 or higher for optimal performance. The minimum octane requirement is AKI 87 (RON 91). Using the recommended premium fuel will help ensure proper engine performance and longevity.

How do I reset the service reminder light?

The service reminder light illuminates every 7,500 miles, after 750 hours of driving, or after 12 months. This light can only be reset by an authorized Volvo retailer using diagnostic equipment after the required maintenance has been performed.

What should I do if my airbag warning light comes on?

If the SRS warning light stays on after starting or comes on while driving, there's a fault in the airbag system. Drive to an authorized Volvo retailer immediately for inspection. Do not attempt to service the system yourself as it can be dangerous.

How often should I check my engine oil level?

Check the engine oil level every time you refuel, especially during the break-in period. The manual specifically notes that oil consumption is higher when the engine is new, making frequent checks essential for engine protection.

Can I use snow chains on my S80?

Yes, but only Volvo-approved snow chains should be installed on the front wheels only. Special chains are required for 215/55 R16, 225/55 R16, and 225/50 R17 tires. Never exceed 31 mph when using chains.

What is the Geartronic transmission feature?

Geartronic allows manual gear selection using the automatic transmission. Move the selector from D to M position, then push forward (+) for higher gears or pull back (-) for lower gears. This provides more control while maintaining automatic transmission convenience.

How do I activate the alarm system?

The alarm automatically arms when you lock the car using the remote control, key, or central locking button. One long flash of the turn signals confirms the alarm is set. The system monitors doors, hood, trunk, ignition, and optional interior sensors.

What does the Winter/Wet driving mode do?

The W mode enhances traction by modifying transmission shift patterns for slippery conditions. Press the button at the base of the gear selector when in Drive position. An LED illuminates and 'W' appears in the instrument panel to confirm activation.

How do I fold the rear seats for cargo?

Pull the release control handles in the trunk to release the split rear seat backrests. Each section folds independently. There's also a flap in the right section for long, light objects like skis. Always secure cargo to prevent shifting during sudden stops.

What is the recommended tire pressure?

Tire pressures are listed on the label inside the fuel tank cover and vary by tire size and load conditions. Check pressure when tires are cold, preferably when refueling. The temporary spare tire should be inflated to the pressure shown on the fuel tank cover label.

1999 Volvo S80 - Common Problems & Maintenance Guide

The 1999 Volvo S80 represents Volvo's flagship luxury sedan, introducing a new era of Swedish automotive engineering with advanced safety features and refined comfort. This executive sedan comes equipped with either a naturally aspirated 2.9L inline-6 producing 201 hp or a turbocharged 2.8L inline-6 generating 268 hp, both paired with automatic transmissions. The S80 pioneered several safety innovations including the Side Impact Protection System (SIPS) airbags, Volvo Inflatable Curtain (VIC), and Whiplash Protection System (WHIPS). Target buyers include safety-conscious professionals and families seeking European luxury with Volvo's renowned reliability. The S80 offers spacious accommodations, premium materials, and advanced climate control systems. While generally reliable, some age-related issues are common in these 25-year-old vehicles, making regular maintenance crucial for optimal performance.

Common Problems

Automatic Transmission Issuesmoderate

The AW50-42LE automatic transmission may experience shifting problems, fluid leaks, or complete failure around 100,000-150,000 miles. Common symptoms include harsh shifting, slipping gears, or transmission warning lights. Regular fluid changes can help prevent premature failure.

Electrical System Problemsmoderate

Various electrical components may fail including the Electronic Climate Control (ECC) system, power seat motors, and central locking systems. The complex electrical architecture can lead to intermittent faults and dashboard warning lights.

Engine Oil Consumptionmoderate

Both the naturally aspirated and turbocharged engines may develop excessive oil consumption due to worn piston rings or valve seals. Regular oil level monitoring is essential as mentioned in the owner's manual break-in section.

Cooling System Failuressevere

The cooling system components including the radiator, water pump, and thermostat may fail, leading to overheating. The turbocharged models are particularly susceptible due to the additional heat generated by the turbo system.

Front Suspension Wearmoderate

The spring strut suspension with integrated shock absorbers may wear prematurely, causing noise, poor handling, and uneven tire wear. Control arm bushings and ball joints are common failure points.

Recommended Maintenance Schedule

Interval	Service	Priority
Every 7,500 miles	Oil and Filter Change	critical
Every 15,000 miles	Cabin Air Filter Replacement	recommended
Every 30,000 miles	Spark Plug Replacement	critical
Every 40,000 miles	Automatic Transmission Fluid Service	critical
Every 60,000 miles	Coolant System Flush	critical
Every 75,000 miles	Timing Belt and Water Pump Replacement	critical
Every 100,000 miles	Brake Fluid Replacement	critical
Every 10 years	SRS Airbag System Service	critical

1999 Volvo S80 - Common Problems & Maintenance Guide

Common Problems

Recommended Maintenance Schedule

Frequently Asked Questions

Track Your Volvo S80 Maintenance