Original (OEM), Aftermarket, and Surplus: What Each Means
Original or OEM (Original Equipment Manufacturer) parts are identical to what came with your car from the factory, made by the manufacturer or its contracted suppliers. They guarantee fit and performance and are required to keep your warranty valid. They are sold at casa parts counters and cost the most.
Aftermarket parts are made by third-party brands. Quality ranges from near-OEM (Brembo, NGK, Denso, Aisin — often the actual factory suppliers selling under their own name) to cheap copies with poor quality control. Good aftermarket is the sensible middle ground for most routine parts.
Surplus parts — sometimes called ukay-ukay for cars — are used parts salvaged from wrecked or scrapped vehicles, often imported from Japan. They are sold in places like Bocaue, Bulacan and provincial salvage yards, and they can be very cheap for items that are otherwise expensive new.
When to Buy Original (OEM)
Buy OEM when your car is still under manufacturer warranty — using non-genuine parts can void your coverage, and the casa keeps the service records that protect it. OEM is also the right call for complex electronic modules, sensors, and anything where exact fitment and calibration matter.
For safety-critical components — brake parts, wheel bearings, steering and suspension links, airbags — OEM or top-tier aftermarket from a known brand is worth the premium. These are not the place to gamble on an unknown bargain part.
The downside is cost: OEM parts typically run 20 to 50 percent more than quality aftermarket. For an out-of-warranty daily driver, paying full OEM for every part is not always necessary.
When Surplus Parts Are a Smart Buy
Surplus shines for expensive body and trim parts where a used item works exactly like new: fenders, hoods, doors, bumpers, side mirrors, headlights and tail lights, grilles, and interior trim. A surplus headlight assembly can cost a fraction of a new OEM one and perform identically.
Surplus is also reasonable for some non-critical mechanical and accessory parts — switches, motors, and certain engine accessories — provided you can inspect them and the source vehicle's history is reasonable.
Where surplus gets risky is anything with hidden wear or safety implications: engine internals, transmissions, brake components, wheel bearings, and suspension parts. For these, new aftermarket from a reputable brand is almost always the safer, more reliable choice even if it costs more.
Where to Buy Each Type in the Philippines
For OEM, go to your brand's casa parts counter or an authorized parts dealer. For quality aftermarket, Banawe Street in Quezon City and Cartimar in Pasay have hundreds of shops, and online sellers on Lazada and Shopee carry genuine branded consumables with nationwide delivery.
For surplus, the salvage yards in Bocaue, Bulacan are the best-known source, along with provincial surplus and wreckers shops. Bring your old part or its exact specifications, and inspect every item in person before paying.
Wherever you buy, you can find nearby auto parts stores on CarCarePH to compare options in your area before making the trip.
How to Avoid Fakes and Costly Mistakes
Counterfeits are a real risk for high-demand items — fake Motolite batteries, fake Shell and Castrol oil in genuine-looking bottles, and counterfeit brake pads from premium brands have all been documented. The savings are not worth a failed brake or a ruined engine.
Buy safety-critical and branded consumables from established physical shops or authorized dealers. Check for holographic labels, batch codes, tamper-evident seals, and QR verification where the brand offers it. If an oil cap spins without breaking the seal, treat the product as suspect.
For surplus, inspect for cracks, rust, stripped threads, and excessive wear, and ask about the source vehicle. When the price seems too good to be true on an expensive part, it usually is.