How Often Should You Replace Car Parts?
Reviewed by GarageDex editorial
Most wear-and-tear parts follow predictable intervals: oil every 5,000-10,000 miles, wiper blades every 6-12 months, the cabin air filter every 15,000-20,000 miles, the engine air filter around 30,000, and the battery every 3-5 years. Your owner's manual is the final word, but the chart below is the quick reference - with the warning signs that mean replace it sooner.
These are typical intervals for guidance - exact figures vary by vehicle, driving conditions, and the part itself. Click a part to look up the exact spec for your year, make, and model.
| Part | Replace every | Warning signs |
|---|---|---|
| Engine oil & filter | 5,000-10,000 mi | Oil-life monitor, dark gritty oil |
| Wiper blades | 6-12 months | Streaking, skipping, squeaking |
| Cabin air filter | 15,000-20,000 mi | Weak airflow, musty smell |
| Engine air filter | 30,000 mi | Dirty/clogged element, lower mpg |
| Car battery | 3-5 years | Slow crank, dim lights, warning light |
| Headlight bulbs | Halogen ~1 yr, LED 10+ yrs | Dimming, flicker, one side out |
| Brake pads | 30,000-70,000 mi | Squeal, grind, longer stops |
| Spark plugs | 30,000-100,000 mi | Rough idle, misfire, hard start |
Mileage vs time - whichever comes first
Many parts have both a mileage and a time limit. Oil degrades with time even if you barely drive, wiper rubber hardens from sun exposure, and a battery ages chemically regardless of miles. Use whichever limit you reach first.
Plan it by your mileage
Want to see what is due at your odometer reading? Use the maintenance schedule calculator - enter your mileage and it lists what is coming up.
Frequently asked
How often should you change your oil?
Most modern engines on full synthetic go 7,500-10,000 miles (or 6-12 months); under severe use - short trips, towing, extreme heat - closer to 5,000. Follow your oil-life monitor or owner's manual.
How often should you replace wiper blades?
Every 6 to 12 months, or as soon as they streak, skip, or chatter. Sun and ozone degrade the rubber even if you rarely use them.
How long does a car battery last?
Typically 3 to 5 years. Heat shortens it; if yours is over 4 years old and cranking slowly, test or replace it before it strands you.
Need your car's exact spec? Find the right part for your car →