Coolant pump — Mk4 Golf Cooling (2003 - 2004)

Factory title: Volkswagen Golf/Golf R32 (2003 - 2006) - Coolant pump

Generation: Mk4 2003 - 2004 (MEX, RDW) Group: Drive cooling Rebuild step 8 Parts: 62 Primary OEM: 1J0 122 051 AS, 1J0 122 101 BS, 1J0 121 087 L

Coolant pump for the Volkswagen Golf Mk4 (2003 - 2004): factory exploded diagram 121057 from the Volkswagen ETKA parts catalogue, group 11 Drive cooling, listing 59 OEM part numbers across 62 catalogued positions including 1J0 122 051 AS, 1J0 122 101 BS and 1J0 121 087 L. Parts on this plate carry the engine code AQN. Published by Type 19 Specialists; the complete Mk4 Golf catalogue is in print as the Mk4 Golf Master Parts Catalogue.

Parts on this diagram

This Mk4 Golf plate lists 59 OEM part numbers across 62 numbered positions.

Exploded view from the factory parts catalogue. Click a row in the parts table to highlight its position on this diagram. Click any position on the diagram to scroll to its row.
№ Description Part number
Coolant cooling system 2.3 ltr. 5-cylinder+AQN
2.3 ltr.
AQN
—
(1)
Coolant hose(Coolant regulator housing > coolant radiator) 5-speedautomatic
 1J0 122 051 AS
(15)
Coolant hose(Coolant regulator housing > coolant radiator/pipe)
 1J0 122 101 BS
(17)
Distributor
 1J0 121 087 L
(2)
Quick acting coupling 5-speedautomatic
 1J0 122 291 G
(23)
Coolant hose withquick release coupling(Heat exchanger > coolantpipe>additional coolant pump)
 1J0 122 073 BP
(24)
Quick acting coupling
 3B0 122 291 B
(25)
Coolant pipe 4 motion
 1J0 121 070 BA
(32)
Bracket with coolant pipe
 022 131 561 G
(32)
Bracket with coolant pipe
 022 131 561 Q
(40)
Additional coolant pump
 3D0 965 561 D
(50)
Spring band clamp 14 X 12
14 X 12
 N 906 867 01
(52)
Spring band clamp 23 X 12
23 X 12
 N 906 869 01
(53)
Spring band clamp 27 X 12
27 X 12
 N 906 870 01
(55)
Spring band clamp 40 X 12
40 X 12
 N 906 872 01
1
Coolant hose(Coolant regulator housing > coolant radiator)
 1J0 122 051 AG
10
Coolant pipe
 066 121 050 B
11
O-ring 34,5 X 3,55
34,5 X 3,55
 N 101 392 01
12
Bungs
 7M3 121 099
15
Coolant hose(Coolant regulator housing > coolant radiator/pipe) 5-speedautomatic
 1J0 122 101 CB
16
Quick acting coupling
 3B0 122 291 C
17
Distributor 5-speedautomatic
 1J0 121 087 K
2
Quick acting coupling
 3B0 122 291 C
20
Coolant hose(gearbox oil cooler > adapter) 5-speedautomatic
 1J0 122 096 E
21
Bracket
 1J0 121 093 BA
23
Coolant hose withquick release coupling(Transm. oil cooler > heat exchanger > coolant pipe > additional coolant pump) 5-speedautomatic
 1J0 122 073 BQ
24
Quick acting coupling 5-speedautomatic
 1J0 122 291 D
25
Coolant pipe
 1J0 121 070 AS
26
Hexagon collar nut M 6
M 6
 N 015 082 13
26
Hexagon collar nut M 6
M 6
 N 015 082 5
27
Coolant hose(Expansion tank > coolant pipe)
 1J0 121 109 N
3
O-ring 32 X 4
32 X 4
 N 907 653 01
30
Coolant hose(heat exchanger>cylinder head)
 1J0 122 157 FK
32
Coolant pipe with bracketfor vacuum lines
 066 131 561 E
33
Socket head bolt withinner multipoint head M 6 X 14
M 6 X 14
 N 102 480 01
34
Coolant hose(Throttle valve connection > coolant pipe)
 1J0 121 447 AG
35
Coolant hose(Coolant regulator housing > additional coolant pump)
 1J0 121 449 G
37
Coolant hose withconnecting line for activatedcarbon filter system
 1J0 133 366 AF
4
retaining spring 32 MM
32 MM
 1J0 121 142
40
Additional coolant pump
 1J0 965 561 A
41
Rubber bush
 035 959 209 F
41
Rubber bush
 035 959 209 E
42
rubber mount.with locat.divice
 066 959 209
42
rubber mount.with locat.divice
 021 959 209
43
Bracket for additional coolantpump
 066 121 079 D
44
Socket head bolt withinner hex round head M 6 X 16
M 6 X 16
 N 103 470 03
44
Socket head bolt with hexagonsocket head (combination) M 6 X 16-S 4-N
M 6 X 16-S 4-N
 N 100 841 02
47
see illustration: 121-065
121-065
 —
48
see illustration: 121-075
121-075
 —
50
Spring band clamp A 14 X 12
A 14 X 12
 N 102 922 01
51
Spring band clamp 19 X 12
19 X 12
 N 909 264 01
51
Spring band clamp A 19 X 12
A 19 X 12
 N 906 554 01
52
Spring band clamp 23 X 12
23 X 12
 N 906 555 01
53
Spring band clamp 27 X 12
27 X 12
 N 906 556 01
54
Spring band clamp 32 X 12
32 X 12
 N 906 871 01
54
Spring band clamp 32 X 12
32 X 12
 N 906 557 01
55
Spring band clamp 40 X 12
40 X 12
 N 906 558 01
56
Spring band clamp A 47 X 12
A 47 X 12
 N 906 559 01
56
Spring band clamp 47 X 12
47 X 12
 N 909 265 01
7
Coolant hose(oil cooler > water pipe)
 066 121 096 D
8
Coolant hose(oil cooler > cylinder block)
 066 121 058 B
9
sealing plug
 021 121 022

From the Type 19 workshop

Volkswagen Golf Mk4 work in the Type 19 workshop — the same cars these cooling diagrams are drawn from.

Volkswagen OEM Parts Catalogues and Torque reference manuals! Get amongst it. Volkswagen OEM Parts Catalogues and Torque reference manuals from Type 19 Specialists — the printed editions the free catalogue pages are drawn from.

Fitment and applicability

What this plate covers, as the factory catalogue records it — nothing here is inferred from the part names.

Vehicle
Volkswagen Golf Mk4
Model years
2003 - 2004
Generation region
MEX, RDW
Generation code
405
Engine codes on this plate
AQN
Factory group
11 Drive cooling
Factory subgroup
121057

Related factory diagrams

Other published cooling plates for the Mk4 Golf in this catalogue.

The complete Mk4 Golf parts catalogue in print

Questions about this diagram

Which VW part numbers are on the coolant pump diagram for the Mk4 Golf?
This diagram lists 59 OEM part numbers for the Mk4 Golf. The first three are 1J0 122 051 AS, 1J0 122 101 BS and 1J0 121 087 L.
Which Mk4 Golf years and engines does this diagram cover?
This plate is from the Mk4 Golf 2003 - 2004 generation (MEX, RDW). The parts on it carry the engine code AQN.
Where is the complete Mk4 Golf factory parts catalogue?
The Mk4 Golf Master Parts Catalogue is available in print and as a PDF from Type 19 Specialists at /shop/library/catalogue-mk4-mechanical/. It carries every plate in this catalogue, not just this one.
Volkswagen Golf/Golf R32 (2003 - 2006) - Coolant pump

Volkswagen Golf/Golf R32 (2003 - 2006) - Coolant pump