Complete Car Maintenance Schedule: When to Service What

Detailed Breakdown

This comprehensive maintenance schedule covers what to inspect, service, or replace at each major mileage milestone. Your owner's manual is always the definitive source for your specific vehicle, but these guidelines apply to most modern cars and will keep you ahead of problems.

Every Month (Ongoing Checks)

These take 5 minutes and cost nothing:

• Tire pressure — Check all four tires plus the spare when cold. Adjust to the pressure listed on the driver's door jamb sticker.
• Oil level — Check the dipstick (if equipped). Top up if low, but investigate if it drops significantly between changes.
• Coolant level — Check the overflow reservoir. It should be between the MIN and MAX marks when the engine is cold.
• Lights — Walk around the car and verify all headlights, brake lights, turn signals, and reverse lights are working.
• Washer fluid — Top up as needed. Use winter-rated fluid in cold climates.
• Windshield and wipers — Look for chips in the windshield (repair before they spread) and check wiper blade condition.

Every 5,000-7,500 Miles (or 6 Months)

This is your routine service interval — the heartbeat of car maintenance:

• Oil and filter change — Use the oil type and weight specified in your owner's manual. Conventional oil every 5,000 miles, synthetic every 7,500-10,000 miles.
• Tire rotation — Move tires between positions to ensure even wear. Follow the rotation pattern for your drivetrain (FWD, RWD, AWD).
• Multi-point inspection — A quick visual check of brakes, suspension, belts, hoses, and fluid levels. Most shops include this with an oil change.
• Wiper blade check — Replace if streaking, skipping, or showing visible wear. Most blades last 6-12 months.

Every 15,000 Miles (or 1 Year)

Annual maintenance adds deeper inspections:

• Air filter replacement — A clogged air filter reduces fuel economy and performance. Check every oil change; replace when visibly dirty, typically every 15,000-30,000 miles.
• Cabin air filter — Replace every 15,000-20,000 miles. This filters the air inside your cabin — especially important for allergy sufferers.
• Battery test — Have the battery and charging system tested, especially if the battery is over 3 years old.
• Brake inspection — Measure pad thickness and check rotor condition. Front pads should be checked more frequently since they wear faster.
• Suspension and steering — Check for worn bushings, leaking shocks, loose tie rod ends. Listen for clunks or rattling over bumps.
• Full service — Comprehensive inspection of all systems (see the car service guide for details).

Every 30,000 Miles (or 2 Years)

The first major service milestone:

• Transmission fluid — Change or inspect fluid condition. Automatic transmissions typically need fresh fluid every 30,000-60,000 miles. Check your manual.
• Brake fluid — Brake fluid absorbs moisture over time, lowering its boiling point and reducing effectiveness. Flush and replace every 2-3 years or 30,000 miles.
• Power steering fluid — If your vehicle has hydraulic power steering (not electric), check and replace the fluid. It should be clear, not dark or cloudy.
• Fuel filter — On vehicles with a serviceable external fuel filter, replace every 30,000-40,000 miles. Many modern cars have a lifetime filter inside the fuel tank.
• Drive belt (serpentine belt) — Inspect for cracks, fraying, or glazing. Replace if worn. Most belts last 60,000-100,000 miles but should be checked every 30,000.
• Wheel alignment — Check and adjust if needed. Especially important if you notice uneven tire wear or the car pulling to one side.

Every 60,000 Miles (or 4 Years)

Deeper maintenance to keep high-mileage reliability:

• Spark plugs — Replace if using platinum plugs. Iridium plugs may last until 100,000 miles. Copper plugs should have been replaced at 30,000.
• Coolant flush — Drain and refill the cooling system with fresh coolant of the correct type. Replace the radiator cap.
• Transmission fluid (if not done at 30K) — For vehicles with longer intervals or "lifetime" fluid, this is a good safety margin.
• Drive belt replacement — If the serpentine belt hasn't been replaced yet, do it now. A broken belt means no power steering, no alternator, and no AC — and possibly an overheated engine.
• Timing belt (if applicable) — Vehicles with timing belts (not chains) typically need replacement at 60,000-100,000 miles. This is critical — a broken timing belt can destroy the engine on interference engines. Check your manual. Cost: $500-1,000.
• Shock absorbers and struts — Inspect for leaks and bounce test. Most last 50,000-100,000 miles but degradation is gradual.
• Brake pads and rotors — Likely time for a second set of front pads. Rear pads may be due for their first replacement. Resurface or replace rotors if below minimum thickness.

Every 100,000 Miles (or 7-8 Years)

The six-figure milestone — your car is aging gracefully with proper care:

• Spark plugs (iridium) — If you've been running long-life iridium plugs, now is the time. Don't push past the recommended interval.
• Water pump — Often replaced as a precaution during timing belt service or at 100,000 miles. A failed water pump causes rapid overheating. Cost: $300-600 installed.
• Timing belt (if not done at 60K) — Check your manual for the exact interval. Some vehicles specify 100,000 miles.
• Transmission service — Even "lifetime" fluid should be changed by now. Full flush or drain and fill.
• Ignition coils — While they can last 100,000+ miles, they should be inspected. Replace any that show signs of weakness (intermittent misfires).
• Rubber hoses — Radiator hoses, heater hoses, and vacuum lines degrade with age. Inspect and replace any that are soft, cracked, or bulging.
• Motor mounts and transmission mounts — Rubber mounts wear out, causing vibration and clunking. Inspect and replace if cracked or collapsed.
• Rear differential fluid (RWD/AWD) — Change every 30,000-60,000 miles, so likely due for a second change by now.

The Importance of Records

Keep a log of every service performed, with dates, mileage, and receipts. This is essential for:

• Warranty claims (manufacturer and extended)
• Tire treadwear warranties
• Resale value (documented maintenance history increases value by 10-20%)
• Tracking patterns (e.g., if a component keeps failing prematurely)

A simple spreadsheet, a notes app, or a tracker works perfectly. The key is consistency.

Signs Your Car Needs Attention

Beyond the schedule, these symptoms warrant immediate attention:

• Any dashboard warning light that stays on
• Unusual noises (grinding, squealing, knocking, rattling)
• Fluid puddles under the car (identify by color: brown = oil, green/orange = coolant, red = transmission, clear = AC condensation which is normal)
• Vibration in the steering wheel or brake pedal
• Pulling to one side while driving or braking
• Burning smell from any area of the car
• Sudden decrease in fuel economy
• Engine overheating or running hotter than normal

Quick Reference Table

| Mileage / Time | Key Services | Estimated Cost | |----------------|-------------|----------------| | Monthly | Tire pressure, fluid levels, lights | Free (DIY) | | 5,000 mi / 6 months | Oil change, tire rotation, wipers | $50-150 | | 15,000 mi / 1 year | Air filter, cabin filter, brake check, battery | $200-400 | | 30,000 mi / 2 years | Trans fluid, brake fluid, alignment, belt check | $300-600 | | 60,000 mi / 4 years | Spark plugs, coolant, timing belt, shocks | $500-1,500 | | 100,000 mi / 7-8 years | Water pump, plugs, hoses, full transmission | $500-2,000 |