Engine oil & filter
5,000–7,500 mi
Conventional oil leans shorter; full synthetic can stretch to 7.5k–10k miles. Check level monthly.
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Know the price before you visit the mechanic.
AutoRepairing estimates realistic car repair costs and helps you decode worrying symptoms — so you walk into the shop informed and never get overcharged.
- 12 common repairs
- 4 vehicle classes
- 8 symptom diagnoses
Repair Cost Estimator
Pick your vehicle class and the job. We show a typical US price range with a parts vs. labor breakdown.
Estimates are informational averages for the US market and exclude tax, shop fees, and severe damage. Always confirm with a local quote.
Symptom Checker
Hearing or feeling something off? Pick the closest symptom to see likely causes, urgency, and what the fix may cost.
This is not a substitute for professional diagnosis. If a result says Do not drive, stop driving and call a mechanic or roadside assistance.
Maintenance Interval Cheat Sheet
General service intervals for a typical gasoline vehicle. Always defer to your owner's manual when in doubt.
Brake pads
25,000–65,000 mi
Highly driving-dependent. Replace at the first persistent squeal or grind, or under 3mm pad thickness.
Tire rotation
5,000–8,000 mi
Rotate every other oil change. Check pressure monthly and inspect tread with the penny test.
Engine coolant
30,000–60,000 mi
Long-life (OAT) coolant can last 100k+ miles. Flush sooner if it looks rusty or murky.
Transmission fluid
30,000–60,000 mi
Automatics under load (towing) need it sooner. "Lifetime" fluids still benefit from a drain & fill.
Timing belt
60,000–100,000 mi
Critical on interference engines — a snapped belt can wreck the engine. Timing chains usually last the car's life.
Spark plugs
30,000–100,000 mi
Copper plugs ~30k; iridium/platinum 90k–100k. Misfires and rough idle are the tell.
Air filter
15,000–30,000 mi
Engine air filter affects performance; cabin filter affects AC airflow and smell. Cheap DIY wins.
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