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, shows what maintenance is due at your mileage, and helps you decode worrying symptoms — so you walk into the shop informed.
- 12 common repairs
- 10 service items
- 8 symptom diagnoses
Repair Cost Estimator
Pick your vehicle class and the job. We estimate a typical US price range as parts + (labor hours × your shop's hourly rate).
How to use this: estimates are informational averages for the US market and exclude tax, shop supply fees, diagnostic charges and severe/rusted-in damage. Always confirm with a written local quote. Prices are ranges, never a guaranteed cost.
Maintenance Scheduler
Enter your current mileage to see what routine service is coming due — sorted by what's closest. Add your yearly miles for a rough time estimate.
These are general intervals for a typical gasoline vehicle. Your owner's manual / OEM maintenance schedule is always authoritative — severe-service (towing, short trips, dust, extreme heat/cold) schedules are shorter. Wear items like brakes depend on how you drive; inspect rather than replace purely on mileage.
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. When in doubt about a safety-critical system, don't drive it.
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.
Guides
Plain-English explainers on the repairs, costs and symptoms drivers search for most. Every guide is dated and cites named sources.
Cost
Brake pad replacement cost
What front and rear brake jobs really cost in 2026 — and how to avoid over-paying.
Read guide → DiagnosticsCheck engine light: top causes
The most common triggers, from a loose gas cap to a failing catalytic converter.
Read guide → OBD-IICode P0300: random misfire
What a P0300 means, why it's urgent when it flashes, and typical repair costs.
Read guide → MaintenanceHow often to change your oil
Why "every 3,000 miles" is outdated and what synthetic-oil cars actually need.
Read guide → MaintenanceMaintenance schedule by mileage
A mile-by-mile checklist from 5,000 to 100,000 miles, with rough costs.
Read guide → SymptomsWhy is my car making that noise?
Squeals, grinds, clunks and hums — decoded by when and where you hear them.
Read guide → SymptomsSigns you need a new battery
Slow cranks, dim lights and the 3–5 year rule for 12V car batteries.
Read guide → CostDIY vs. mechanic: what to save
Which jobs are worth doing yourself — and which to always leave to a pro.
Read guide →Get repair-cost reality checks by email
Occasional, no-spam notes: seasonal maintenance reminders, "is this quote fair?" breakdowns, and new guides. Unsubscribe anytime.