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14 auto parts calculators: timing belt, brake pads, coolant, battery, bulbs, DTC codes and more. Enter your vehicle for factory-standard recommendations.
Vehicle + mileage + conditions → belt remaining life + replacement recommendation. Supports 20+ brands, includes timing chain check.
OBD-II trouble code decoder. Enter P0300/P0420 for official definitions, DIY diagnosis, compatible parts. 9,400+ code database.
Pad type + driving habits + mileage → remaining life estimate. Organic/ceramic/semi-metallic options.
Pulley diameter + center distance → belt length + standard size match. Supports V-belts and multi-rib belts.
Min temperature + coolant type → recommended mix ratio. Ethylene/propylene glycol modes with preset city temperatures.
Vehicle → coolant spec match. 29 brands · 2,254 models · SLLC/Type2/Dex-Cool/G12/G13 supported.
Vehicle → PCD bolt pattern / center bore / offset(ET) / lug nut torque. Japanese/German/Chinese brands covered.
Old vs new tire specs → diameter difference / circumference change / speed deviation. Helps choose replacement tires.
Bore × stroke × cylinders → displacement (cc/L). Built-in library of 16 common engine specs for one-click fill.
Vehicle → recommended viscosity + oil capacity. SAE explanation, synthetic vs mineral oil, change intervals.
Year + make + model → spark plug type + electrode gap. 2000-2025 · 30 brands · 423 engine configs.
Vehicle + driving habits → oil change mileage/interval. 15 brands · 60+ common models.
Vehicle → BCI Group Size / CCA / Ah. 15 brands · 70+ models covered.
Vehicle → driver/passenger/rear wiper size + connector type. 25+ brands · 240+ models.
Vehicle → low/high/fog bulb specs. H4/H7/H11 confusing? Enter your vehicle to find out.
Belt length, engine displacement, tire comparison and more are calculated using mathematical/physical formulas, no database required.
Coolant, battery, headlight, wiper data queried from VehicleSpec table (2,375 records) via PostgreSQL.
Timing belt intervals, brake pad life, and oil grades follow manufacturer maintenance manuals and SAE/ISO standards.
Motuon — professional auto parts supplier. Brake Systems · Engine Parts · Drivetrain · Suspension · Cooling Systems · Electrical Systems. All products ISO 9001 certified, OEM and bulk export available.