OEM
The term OEM stands for Original Equipment Manufacturer. What does that really mean? It means that the part was made by a company that is a subcontractor to a vehicle manufacturer. It DOES NOT mean the part was made by the manufacturer. Some examples;
Most fuel parts on a VW are made by Bosch. This means that Bosch is the OEM for VW regardless of where you buy the Bosch part it is still OEM.
Hella is an OEM light supplier to many of the European vehicles.
Almost all remanufactured parts are OEM as the original part is rebuilt which does not change whom made the part.
It has long been a common missconception that only a vehicle dealership carries OEM parts. Though they would like you to beleive that, it is not the case. Many if not most parts you get from a dealership you can also get elsewhere for less money made by the exact same company in a different box.

Exhaust Gas Temperature Sensor - Front 3HTS0096
CAD $ 140.00
Xenon Bulb Ballast 4G0907397R
CAD $ 185.00
Servo Air Motor 2Q0907511D
CAD $ 85.00
Vacuum Hose 06A133789
CAD $ 135.00
Radiator Fan Control Module 8K0959501G
CAD $ 405.00
Intercooler Hose 7L0145737
CAD $ 105.00
Turbo Inlet Adapter 3C0129635
CAD $ 20.00
Turbocharger IHI 04E145721F
CAD $ 1,350.00
Vehicle Speed Sensor 191919149E
CAD $ 35.00
Piston Ring Set 06B198151B
CAD $ 20.00
Connecting Rod Bearing Set 034105701
CAD $ 30.00
Connecting Rod Bearing Set 022105701C
CAD $ 63.00
Serpentine Belt Tensioner 06C903133B
CAD $ 83.00
Camshaft Retaining Ring 066109345B
CAD $ 10.00
Coolant Bleeder Screw Plastic WHT000316
CAD $ 7.00
Hex Bolt N90758302
CAD $ 2.35
Oil Cooler & Line Seal A/T 9x1.5mm
CAD $ 1.80
Third Brake Light Assembly 8E5945097C
CAD $ 105.00
Turbo Manifold Nut N90894601
CAD $ 2.18
ZF Lifeguard 6 Automatic Transmission Fluid 1L
CAD $ 33.00
ZF Lifeguard 8 Automatic Transmission Fluid 1L
CAD $ 45.00
Water Pipe Seal 06B121687
CAD $ 3.07
Brake Pad Wear Sensor Front 4G0615121C
CAD $ 10.00
Headlight Bulb Igniter 1T0941471
CAD $ 178.00
Power Steering Pump 8E0145153J
CAD $ 280.00
Inner Boot Clamp N90654101
CAD $ 4.00
Pinch Bolt N10576802
CAD $ 4.10
Nut Self locking N90892302
CAD $ 1.40
Washer N10406105
CAD $ 0.55
Exhaust Gasket 8K0253115J
CAD $ 8.00
Thrust Bearings WHT000033D
CAD $ 14.00
Water Pump 06L121012A
CAD $ 100.00
Crankshaft Bolt N91005902
CAD $ 3.00
PCV Vent Hose 06E103217AA
CAD $ 190.00
Vacuum Pump Gasket 06E145417A
CAD $ 15.00
Pc Valve Hose 03H103202D
CAD $ 140.00
Rear Bump Stop S/Suspension 4B0512131B
CAD $ 13.50
Drain Plug Gasket 01V321379
CAD $ 4.50
Gasket for Breather Tube 06D131550D
CAD $ 4.85
Exhaust Manifold Stud Lower 06F103397
CAD $ 2.10
Exhaust Manifold Stud Upper N0145555
CAD $ 1.45
Evaporator Temperature Sensor 1K0907543G
CAD $ 25.00
Ambient Air Temperature Sensor 1J0919379A
CAD $ 10.00
Downpipe Gasket 4D0253115A
CAD $ 5.00
Exhaust Manifold Gasket 059253039D
CAD $ 8.25
Rear Wiper Arm 8R09554071P9
CAD $ 40.00
Rear Wiper Cap 8K9955205
CAD $ 10.00