Auto Parts
Repair manuals, parts guidance, fitment checks, and practical resources for planning the repair correctly.
Browse auto parts by category
Choose the system you are repairing first. Each category page combines fitment checks, repair-planning guidance, new-parts options, used OEM searches, and the manuals or diagnostic resources that matter for that job.
Shop the source that actually fits the job
CarManuals.net does not send every repair to one store. Direct parts partners are used where their catalog fits; Amazon fills broad new-parts, tools, and maintenance gaps; eBay Motors remains the primary used OEM and discontinued-parts marketplace.
Headlight assemblies, bumpers, running boards, tonneau covers, floor mats, light bars, and truck/SUV accessories.
Shop OEDRO → Engine parts WanasignautoEngine overhaul kits and performance camshafts for selected LS, Hemi, and EcoBoost applications.
Shop engine parts → Keys & remotes Locksmith KeylessReplacement key fobs, remotes, transponder keys, locksmith tools, and programming supplies.
Shop keys & remotes → Broad new-parts fallback Amazon AutomotiveMaintenance parts, common replacement items, tools, repair supplies, and printed automotive references.
Search Amazon → Used OEM & hard-to-find eBay MotorsUsed OEM, discontinued, new-old-stock, remanufactured, and vehicle-specific components.
Search eBay Motors →Affiliate disclosure: CarManuals.net may earn a commission from qualifying purchases through these links, at no additional cost to you. As an Amazon Associate I earn from qualifying purchases. CarManuals.net also participates in the eBay Partner Network.
Four checks that prevent expensive fitment mistakes
A code, noise, leak, or symptom identifies where to investigate; it does not automatically prove which component needs replacement.
Use the VIN, engine, transmission, drivetrain, build date, axle, trim, emissions package, and option codes.
Photograph the original label and verify the complete manufacturer number, revision, supersession, connectors, mounting points, and dimensions.
Check for seals, one-time-use hardware, fluids, special tools, torque-angle bolts, bleeding, programming, relearn, alignment, or calibration.
New, aftermarket, remanufactured, or used OEM?
| Source | Best fit | Why choose it | Main checks |
|---|---|---|---|
| New OEM | Sensors, emissions parts, safety systems, exact-fit mechanical and electronic components | Factory specification, predictable fit, documented supersessions | Price, availability, correct revision |
| Reputable aftermarket | Filters, brakes, bearings, suspension, belts, hoses, maintenance items | Broad availability, warranty choices, multiple quality levels | Brand quality, application details, included hardware |
| Remanufactured | Alternators, starters, steering racks, compressors, transmissions, engines, modules | Lower cost than new for many rebuildable assemblies | Core charge, rebuilder quality, programming, shipping damage |
| Used OEM | Lighting, trim, modules, radios, wheels, body parts, discontinued assemblies | Factory fit and finish plus access to obsolete components | Condition, mileage, hidden damage, programming, return terms |
Use diagnostic tools when the symptom does not identify the part
Electronic, emissions, charging, starting, network, ABS, TPMS, and drivability faults often need testing before a replacement part is justified. A scanner or meter can prevent a parts-cannon repair.
Diagnostic tool partners
Use scan data, bidirectional testing, service functions, TPMS tools, and electrical testing to confirm the fault before ordering expensive components.
Affiliate disclosure: CarManuals.net may earn a commission from qualifying purchases through marked links, at no additional cost to you.
For code definitions and diagnostic research, also use OBDGuides.com.
Research the part before you spend
Auto parts questions
Is OEM always better than aftermarket?
No. Reputable aftermarket parts can be excellent for maintenance and common mechanical repairs. OEM is often preferable when exact electronics, calibration, fit, finish, or emissions compatibility matters.
When is used OEM the better choice?
Used OEM is especially useful for discontinued parts, factory lighting, trim, brackets, radios, wheels, modules, switches, and expensive assemblies that are difficult to reproduce accurately.
Can I trust a fitment checker?
Use it as one layer of confirmation. Also verify VIN information, engine and transmission, build date, option codes, the original part number, connectors, and dimensions.
Why should I read the manual first?
The procedure can reveal additional parts, one-time-use fasteners, fluids, tools, torque specifications, programming, alignment, or calibration that changes the true cost of the repair.