All parts categories
Six categories cover most of what actually fails on a car. Every guide starts with confirming the part fits your exact vehicle, then covers which grade is worth paying for and where the cheap option is genuinely fine.
Brakes
The most replaced wear parts on the road, and the easiest place to overpay.
Pads, rotors, calipers
Ignition
Cheap to fix, expensive to ignore, and full of counterfeits worth spotting.
Plugs, coils, wires
Filters
Where counter markup is highest and the online price gap is widest.
Oil, air, cabin, fuel
Batteries
Fitment here is a physical box size, so the group number beats the brand.
Group sizes and cranking amps
Suspension
Big-ticket parts where grade differences show up in a year, not a week.
Struts, shocks, control arms
Engine
The parts people order twice, because the symptom is not the failed part.
Sensors, pumps, gasketsBefore you pick a category
Decode your VIN
Ten seconds, free, federal data. Returns your engine, trim, plant and build details — the information every parts lookup depends on.
Read the fitment guide
The order of operations that keeps the wrong part out of your driveway, whatever category you are shopping.