Volkswagen Part Number System

The part number is read in several blocks . First, there are three blocks with 3 characters each . Followed by  (but not all the time) an index in place 10 and 11 , then ( only if necessary ) an identifier such as for color or software versions for control units .

An example of a control unit:

Initial    Central     End Digits    Index     Software Version
5K0                        937            087                         AC                      Z15
 

INITIAL DIGITS

The two numbers on the farthest left of the Initial Digits are characterized by the type of vehicle, e.g;
3D = Phaeton / D1
1H = Golf III / A3 – VW330
1J = Golf IV / A4 - PQ34
3B = Passat / B5
8L = Audi A3 / PQ34
1M = Seat Leon / PQ34
17 = Golf I / A1 - Typ17
19 = Golf II / A2 - VW320 - 19E
The number next to these first 2 digits  refers to the Body Shape (the variants passenger cars, excluding vans/ trucks)
0 = General, 1 = LHD vehicle, 2= RHD, 3 = Two-door, 4= Four-door, 5 = Notchback, 6 = Hatchback, 7 = Special Form, (Convertible, Pick-up ...), 8 = Coupe, 9= Variant
 It should be noted that all numbers can be distinguished in a certain vehicle. The assignment of the number carries out specific parts. A side panel gets, for example, the figure for the rear shape parts in the field switchboard and are referred to the position of the steering wheel, etc.
If the third character is not numeric but of letters, then it must be a derivative or a market-adapted model (e.g. from Mexico, China). These are labeled only for the passenger vehicle sectors. Thecommercial vehicles, on the other hand, is referred to another variants.
 

CENTRAL DIGITS

The first appearing number of the Central Digits  indicates the Main Groups (construction areas).
 0 = carriage fully and accessories 1 = Motor 2 = Fuel tank, Exhaust system, Heater 3 = Transmission 4 = Front axle, Steering 5 = Rear axle 6 = Wheels, Brakes, Leveling 7 = Framework 8 = Structure 9 = Electrical system
The preceding number or numbers (Central Digits) indicate/s the Subgroups. It should be noted that like numbers subgroup, have different meanings in different main groups. Not every subgroup number exists in each main group.

 Main Group 1 = Motor

 00 = Assemblies 01 = Crankcase , Cylinder and Head ( Diesel ) 05 = Crankshaft , Bearings and Connecting rods 07 = Pistons, Rings and Pins 09 = Camshaft and Valves 15 = Oil pump and Oil de-aerator 17 = Oil cooler 19 = Air cooling and Cover plate 21 = Water cooling and Water pump 27 = Fuel pump and lines 28 and 29 = Carburetor and Intake lines 30 = Injection ( diesel ) 31 = Emission ( outlet ) 32 = Emission ( inlet ) 35 = Controller and injection ( mechanical ) 41 = Clutch 42 = Automatic clutch 45 = Turbo Charger and Auxiliary equipment 63 = Mass balance 90 = Reserved 98 = Repair Kits ( ET ) 99 = Mounting  

Main Group 2 = Fuel tank, Exhaust system, Heater

 00 = Assemblies 01 = Fuel tank 09 = Fuel shutoff . , mounting parts, fuel pump 51 = Back engine Exhaust System 53 = Front Engine Exhaust System 55 = Heating ( motor ) self-sufficient 56 = Heating ( engine ) unit 59 = Fresh air system 60 Air Conditioning 61 = Auxiliary heater ( auxiliary heating ) 65 = Heating ( water ) 70 and 71 = Reserved VWoA 72 and 79 = Reserved VWoA 90 = Reserved 98 = Repair Kits ( ET ) 99 = Mounting  

Main Group 3 = Transmission

 00 = Assemblies 01 = Gearbox and Cover 05 = Synchronous Electrical Control  07 = Wheels and Shafts 09 = Part-Synchronous Wheels and shafts 11 = Full-Synchronous Wheels and Shafts  13 =Electric-synchronous Wheels and Shafts 17 = Oil cooler 21 = Automatic Gearbox  Transmission 23 = Automatic Transmission and Converter 25 = Automatic Gearbox Control 31= Sets of Pulleys and Chain 90 = Reserved 98 = Repair Kits ( ET ) 99 = Mounting and Suspension  

Main Group 4 = Front Axle, Steering

00 = Assemblies 01 = Front Axle 05 = Front wheel bearings (support lever only) 07 = Front wheel bearing 09 = Differential gear and Transmission cooler 11 = Front spring (electro-hydraulic) 13 = Shock 15 = Steering spindle and Rollers 17 = Rack and Pinion steering with subframe 19 = Steering (rack) 22 = Power Steering 23 = Power Steering 25= Steering Vapors 98 = Steering Damper Repair Kits (ET) 90 = Reserved 99 = Fixing  

Main Group 5 = Rear Axle

 00 = Assemblies 13 = Shock 01 = Rear axle 05 = Rear axle  07 = Rear 11 = Rear axle spring 12 = Rear shock absorber 15 = Steerable rear axle 17 = Differential Rear Wheel drive 19 = Differential Gear automatic transmission 21 = Propshaft 25 = Rear axle differential 90 = Reserved 98 = Repair Kits (ET  ) 99 = Mounting

 Main Group 6 = Wheels, Brakes, Leveling

 00 = Assemblies 01 = Disc wheel and Tire 05 = Brake (mechanical) 07 = Brake (air and exhaust brake) 09= Brake (hydraulic) 11 = Brake cylinders and Lines 12 = Braking aids 14 = Braking Control Systems 15 = Disc brake and Lines 16 = Leveling 90 = Reserved  98 = Repair Kits (ET) 99 = Mounting  

Main Group 7 = Framework

00 = Assemblies 01 = Frame (type 1) 03 = Frame (type 2), Tipper subframe, Accessories 05 = Frame (type 3) 07 = Old Bumpers 11 = Hand Leverage System 90 = Reserved 13 = Automatic Leverage System 21 = Pedal Cluster 23 = Automatic Transmission Controls 77 = Test 98 = Repair Kits (ET) 99 = Mounting  

Main group 8 = Structure

00 = Assemblies 01 to 04 = Underbody 05 to 06 = Front end 07 = Bumpers 09 to 10 = Side panel 13 to 14 = Rump 15 and 19 = Heating, REV.V., Ventilation 17 = Roof 16 and 20 = Air-conditioning in Body work 21 = Fender 23 = Lid front 25 = Attachments, Undercarriage, Roof  27 = End cover, hinged back door  29 = Loading and Side wall flaps  31 = Front Door body shell  33 = Back Door body shell 37 = Front Door and Window parts  39 = Rear Door and window parts 41 = Wing Door 43 = Sliding Doors 45 = Windows and Seals 47 = Adjustable Side Windows 53 and 54 = Ornamental and Side Protection Bar 57 and 58 = Interior 59 = Interior Ambulance 60 = Optional equipment and Roofreling 61 and 62 = Additional equipment 67 and 68 = Inner lining 71 and 72 = Top 75 = Sunroof (fabric) 77 = Steel Crank Roof 80 = Safety Inside Equipment 81 and 82 = Front Seat 83 = Center Seat 85 and 86 = Rear Seat 87 = Sick seat, Jump seat 89 = Stretcher 90 = Financial Technical Control number 98 = Repair Kits (ET) 99 = Mounting and Sealing 

Main Group 9 = Electrical

00 = Assemblies, Circuit diagrams 01 = Electric drive 03 = Generator 05 = Ignition and Suppression 06 = Electrical Parts G-Lader, Emission control 07 = Control equipment 09 = Coding program ECUs 10 = EVAN system 11 = Starter 15 = Battery 19 = Electric display devices, Oil pressure switch 25 =Dash board instruments 27 = Additional equipment (automatic gearbox), from 1980 electrical ABS 37 = Central electrics 41 = Headlights 43 = Number Plate Light 45 = Stoplights and Rear lights, Reflectors 47 = Interior light 49 = Parklight 51 = Horn 53 = Flashing lamp 57 = Wipers 59 = Electric ventilation, Sunroof, Power windows, Seat height 62 = Electric Central 63 = Electrical parts (Central) 65 = Electric Water Heater, Engine block heater USA (immersion heater) 71 = Module lines 71 and 72 = Electric Lines 73 = Contact housing 90 = Reserved 97 = Exchange control units 98 = Repair Kits (ET) 99 = Mounting and Sealing  

Main group 0 = Car completed and Accessorized

00 and 01 = Car completed and Documented 08 = Situational Awareness 10 = Labels and Tags 11 = Mechanical Jack 12 = Tools and Board literature 16 to 21 = Accessory Votex Company 35 = Radio telephone system 36  and 66 = Accessory Votex Company 67 to 70 = Westfalia Campers 71 to 84 = Accessory Votex Company 90 = Reserved 98 = Repair Kits (ET)  99 = Mounting

END DIGITS

The far left number of the End Digits is literally a counting number. With the same particular part (e.g. window crank), the allocation of this always uses the same final number. Odd numbers ending are retained. Of course, this only applies if the parts are also installed accordingly.
INDEX
The Index is assigned to identify different variants of the same part, such as color variations or different software in ECUs.This may be due to the use of different materials or the installation of the same purchasing parts.Exchange Parts or remanufactured parts are marked with an X.

Color Plate

The Color Indicator specifies the necessary color of the part. This is usually in cladding or trimmed parts of the case; since more than one color is utilized (e.g. in Black, Beige, Brushed Aluminum, Carbon, etc.). GRU are as in that of a primed part, which has yet to be painted.
Standard Parts
Standard parts are i.d.R. which are not marked with the part number. The first six digits are purely counting, the last two digits represent the index. Standard components that are starting 9xx.xxx are similar parts that can not be replaced by a genuine part  from structural point of view. Standard components are  starting with 052.xxx fats, oils, etc. associate.
G = Lubricant, Coolant;
D = Sealant and Adhesive material;
B = Brake fluid and Brake paste

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