90,000 Mile Service

This milestone includes major replacements such as the timing belt and water pump, plus deep inspections and full fluid flushes to prepare your vehicle for higher mileage.

Engine / Under Hood

• Change engine oil & oil filter
• Replace Timing Belt and waterpump
• Replace engine air filter as needed
• Replace cabin air filter as needed
• Inspect spark plugs; replace if needed
• Inspect ignition coils & boots
• Inspect PCV system
• Replace serpentine/accessory belt
• Inspect belt tensioner & pulleys
• Replace engine mounts
• Inspect vacuum/intake hoses
• Inspect for engine oil leaks
• Inspect for coolant leaks
• Inspect for transmission fluid leaks
• Check all under-hood fluid levels

Cooling System

• Check coolant level & condition
• Test coolant protection/condition
• Inspect radiator
• Inspect coolant reservoir
• Inspect upper & lower radiator hoses
• Inspect heater hoses
• Inspect hose connections/clamps
• Inspect water pump for leakage/noise
• Check thermostat operation
• Check radiator/cooling fans
• Check coolant replacement interval
• Pressure-test cooling system if leakage is suspected

Transmission / Drivetrain

• Check transmission fluid condition where serviceable
• Check transmission service history
• Service transmission if required by manufacturer
• Inspect transmission for leaks
• Inspect transmission mounts
• Inspect CV axles
• Inspect CV boots
• Inspect driveshaft
• Inspect U-joints/flex discs where applicable
• Inspect front differential
• Inspect rear differential
• Check differential-fluid service interval
• Inspect transfer case on AWD/4WD vehicles
• Check transfer-case fluid/service interval
• Check for drivetrain vibration/noise

Timing System / Major Engine Maintenance

• Determine whether engine uses timing belt or timing chain
• Check timing-belt replacement interval
• Inspect timing-belt service history
• Inspect timing-chain system for abnormal noise where applicable
• Inspect timing cover for oil/coolant leaks
• Inspect camshaft/crankshaft seal areas for leakage
• Inspect water pump if driven by timing belt
• Inspect accessory belt tensioner/idler pulleys

Brakes

• Inspect front brake pads & rotors
• Inspect rear brake pads/shoes & rotors/drums
• Measure & record brake pad thickness
• Inspect rotor condition
• Inspect brake calipers
• Inspect brake hoses
• Inspect hard brake lines
• Check brake fluid level & condition
• Check brake-fluid replacement interval
• Inspect parking brake
• Check ABS operation/warning lights

Steering / Suspension

• Inspect front shocks/struts
• Inspect rear shocks/struts
• Inspect strut mounts
• Inspect ball joints
• Inspect inner & outer tie rods
• Inspect control arms
• Inspect control-arm bushings
• Inspect sway-bar links & bushings
• Inspect steering rack for leaks/play
• Inspect power-steering system, if applicable
• Inspect wheel bearings
• Check ride height
• Check for suspension noises

Tires / Wheels

• Measure & record all tire tread depths
• Check tire pressures
• Inspect tire age/DOT dates
• Inspect tires for cracking/dry rot
• Inspect for uneven tire wear
• Inspect for sidewall/belt damage
• Rotate tires if appropriate
• Inspect wheels for damage
• Check lug nuts
• Check spare tire/inflator kit
• Check alignment based on wear/road test

Fuel / Intake / Emissions

• Inspect fuel lines
• Check fuel-filter replacement interval
• Inspect air-intake system
• Inspect throttle-body condition
• Inspect EVAP system
• Inspect exhaust system
• Check exhaust for leaks
• Inspect catalytic converter
• Inspect exhaust hangers
• Inspect heat shields

Battery / Electrical

• Test battery
• Inspect battery age
• Inspect battery terminals/cables
• Test charging system
• Check alternator output
• Check starter operation

Exterior / Safety

• Check low/high-beam headlights
• Check brake lights
• Check turn signals
• Check reverse lights
• Check hazard lights
• Check fog lights, if equipped
• Check license-plate lights
• Check horn
• Inspect windshield
• Inspect mirrors
• Inspect wiper blades
• Check windshield washers

Interior / HVAC

• Check A/C operation
• Check heater operation
• Check defrosters
• Check blower motor
• Check power windows
• Check power locks
• Check seat belts
• Check gauges
• Check warning indicators

Computer / Diagnostic

• Perform complete vehicle scan
• Check engine-control module
• Check transmission-control module
• Check ABS/brake module
• Check airbag/SRS module
• Check AWD/4WD system where applicable
• Record current, pending & stored trouble codes
• Check readiness monitors
• Reset maintenance reminder after service

Underbody Inspection

• Check engine/transmission for leaks
• Check differential/transfer case for leaks
• Inspect brake & fuel lines
• Inspect exhaust
• Inspect underbody for damage
• Inspect for excessive corrosion
• Inspect splash shields/undertrays
• Check drivetrain components

Road Test

• Cold-start operation
• Engine idle quality
• Acceleration/performance
• Transmission shifting
• Braking performance
• Steering response
• Suspension noises
• Wheel-bearing noise
• Drivetrain vibration
• Alignment/tracking
• Highway-speed operation when appropriate
• Verify no warning lights after road test