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TOPRAN TOPRAN 638 784 Thermostat Housing 638784

TOPRAN 638 784 Thermostat Housing

Compatible with AUDI A1 (8X1, 8XK) , AUDI A1 Sportback (8XA, 8XF) , AUDI Q3 (8UB, 8UG) Show more info
Durable thermostat housing designed for reliable engine temperature regulation. Ensures optimal performance and longevity.
50.00 EUR
inc. VAT 21%
In stock 14
Delivery 1 day (14.05.2026)
PN 638 784
Make TOPRAN

This TOPRAN thermostat housing, part number 638 784, is engineered to maintain your engine's optimal operating temperature. A properly functioning thermostat housing is crucial for preventing overheating and ensuring efficient fuel combustion. Crafted from high-quality materials, this housing is built to withstand the demanding conditions under the hood, offering resistance to heat and coolant corrosion. Its precise fit ensures seamless integration with your vehicle's cooling system, minimizing the risk of leaks and performance issues. Replacing a faulty thermostat housing can prevent significant engine damage and restore your vehicle's cooling efficiency. Trust TOPRAN for dependable components that meet stringent quality standards.

  • Direct fit for specified vehicle applications
  • Made from durable, high-quality materials
  • Ensures proper engine temperature regulation
  • Resistant to heat and coolant corrosion
  • Helps prevent engine overheating
  • Restores cooling system efficiency
  • Designed for long-lasting performance
Housing material
PA 66 GF 30
Housing material
GFK (Glass Fiber Reinforced Plastic)
Opening temperature
92
Mounting type
pre-assembled
Additional article/Additional info 2
with a fastening ring
Additional article/Additional info 2
with thermostat
Additional article/Additional info 2
without screws
Additional article/Additional info 2
with flange
Housing type
Plastic housing
Additional article/Additional information
with piping
Additional article/Additional information
with a short pipe
Additional article/Additional information
with gaskets
alternative repair kit
117 209
Manufacturer's restriction
GEIGER (GPO)
  • AUDI
    • A1 (8X1, 8XK)
      • 1.6 TDI (66kW/90PS)
      • 1.6 TDI (77kW/105PS)
      • 1.6 TDI (85kW/115PS)
    • A1 Sportback (8XA, 8XF)
      • 1.6 TDI (66kW/90PS)
      • 1.6 TDI (77kW/105PS)
      • 1.6 TDI (85kW/115PS)
    • Q3 (8UB, 8UG)
      • 2.0 TDI (100kW/136PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI quattro (135kW/184PS)
      • 2.0 TDI (88kW/120PS)
      • 2.0 TDI (135kW/184PS)
    • A3 Limousine (8VS, 8VM)
      • 2.0 TDI (105kW/143PS)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (81kW/110PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (100kW/136PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 2.0 TDI quattro (135kW/184PS)
      • 1.6 TDI (81kW/110PS)
      • 1.6 TDI quattro (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
      • 30 TDI (85kW/115PS)
      • 35 TDI (110kW/150PS)
      • 40 TDI quattro (135kW/184PS)
    • A3 Sportback (8VA, 8VF)
      • 2.0 TDI (81kW/110PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI quattro (135kW/184PS)
      • 2.0 TDI (105kW/143PS)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 2.0 TDI (100kW/136PS)
      • 1.6 TDI (81kW/110PS)
      • 1.6 TDI quattro (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
      • 30 TDI (85kW/115PS)
      • 35 TDI (110kW/150PS)
      • 40 TDI quattro (135kW/184PS)
    • A3 (8V1, 8VK)
      • 2.0 TDI (105kW/143PS)
      • 2.0 TDI (110kW/150PS)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (81kW/110PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 2.0 TDI quattro (135kW/184PS)
      • 2.0 TDI (100kW/136PS)
      • 1.6 TDI (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
    • TT (FV3, FVP)
      • 2.0 TDI (135kW/184PS)
    • TT Roadster (FV9, FVR)
      • 2.0 TDI (135kW/184PS)
    • Q2 (GAB, GAG)
      • 1.6 TDI (85kW/115PS)
      • 2.0 TDI quattro (110kW/150PS)
      • 2.0 TDI quattro (140kW/190PS)
      • 30 TDI (85kW/115PS)
  • VW
    • SHARAN (7N1, 7N2)
      • 2.0 TDI (85kW/115PS)
      • 2.0 TDI (130kW/177PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 2.0 TDI 4motion (135kW/184PS)
      • 2.0 TDI 4motion (130kW/177PS)
    • TIGUAN (5N_)
      • 2.0 TDI (81kW/110PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI 4motion (135kW/184PS)
    • GOLF VII (5G1, BQ1, BE1, BE2)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (110kW/150PS)
      • 1.6 TDI 4motion (77kW/105PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 1.6 TDI (66kW/90PS)
      • 1.6 TDI (81kW/110PS)
      • 2.0 TDI (105kW/143PS)
      • 2.0 TDI (81kW/110PS)
      • 2.0 GTD (135kW/184PS)
      • 1.6 TDI 4motion (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
    • GOLF SPORTSVAN VII (AM1, AN1)
      • 1.6 TDI (81kW/110PS)
      • 2.0 TDI (110kW/150PS)
      • 1.6 TDI (66kW/90PS)
      • 2.0 TDI (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
    • SCIROCCO III (137, 138)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
    • PASSAT B8 (3G2, CB2)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (176kW/240PS)
      • 1.6 TDI (88kW/120PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI 4motion (140kW/190PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
    • PASSAT B8 Variant (3G5, CB5)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (176kW/240PS)
      • 1.6 TDI (88kW/120PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI 4motion (140kW/190PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 2.0 TDI (81kW/110PS)
    • TOURAN (5T1)
      • 1.6 TDI (81kW/110PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (140kW/190PS)
      • 1.6 TDI (85kW/115PS)
      • 2.0 TDI (85kW/116PS)
    • CADDY IV Lielas ietilpības automobilis (SAB, SAJ)
      • 2.0 TDI (75kW/102PS)
      • 2.0 TDI (55kW/75PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (90kW/122PS)
      • 2.0 TDI 4motion (110kW/150PS)
    • CADDY IV Furgons/minivens (SAA, SAH)
      • 2.0 TDI (55kW/75PS)
      • 2.0 TDI (75kW/102PS)
      • 2.0 TDI 4motion (90kW/122PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (55kW/75PS)
      • 2.0 TDI 4motion (110kW/150PS)
    • CC B7 (358)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
    • TIGUAN (AD1, AX1)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI 4motion (140kW/190PS)
      • 2.0 TDI 4motion (176kW/240PS)
      • 2.0 TDI (85kW/115PS)
      • 1.6 TDI (85kW/115PS)
      • 2.0 TDI (81kW/110PS)
    • ARTEON (3H7, 3H8)
      • 2.0 TDI 4motion (176kW/240PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (140kW/190PS)
      • 2.0 TDI (140kW/190PS)
    • TIGUAN ALLSPACE (BW2, BJ2)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4motion (110kW/150PS)
      • 2.0 TDI 4motion (140kW/190PS)
      • 2.0 TDI 4motion (176kW/240PS)
    • POLO VI (AW1, BZ1, AE1)
      • 1.6 TDI (59kW/80PS)
      • 1.6 TDI (70kW/95PS)
    • T-CROSS (C11, D31)
      • 1.6 TDi (70kW/95PS)
    • ARTEON SHOOTING BRAKE (3H9)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI 4motion (140kW/190PS)
    • CADDY V Lielas ietilpības automobilis (SBB, SBJ)
      • 2.0 TDi (81kW/110PS)
    • CADDY V Furgons/minivens (SBA, SBH)
      • 2.0 TDi (81kW/110PS)
  • SEAT
    • LEON ST (5F8)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (105kW/143PS)
      • 2.0 TDI (135kW/184PS)
      • 1.6 TDI (66kW/90PS)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (81kW/110PS)
      • 1.6 TDI (81kW/110PS)
      • 1.6 TDI 4Drive (77kW/105PS)
      • 2.0 TDI 4Drive (110kW/150PS)
      • 1.6 TDI 4Drive (81kW/110PS)
      • 2.0 TDI 4Drive (135kW/184PS)
      • 1.6 TDI (85kW/115PS)
      • 1.6 TDI 4Drive (85kW/115PS)
    • LEON (5F1)
      • 1.6 TDI (77kW/105PS)
      • 1.6 TDI (66kW/90PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (135kW/184PS)
      • 1.6 TDI (81kW/110PS)
      • 2.0 TDI (105kW/143PS)
      • 2.0 TDI (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
    • ATECA (KH7, KHP)
      • 1.6 TDI (85kW/115PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI 4Drive (110kW/150PS)
      • 2.0 TDI 4Drive (140kW/190PS)
      • 2.0 TDI (81kW/110PS)
      • 2.0 TDI (105kW/143PS)
    • LEON (KL1, KLG)
      • 2.0 TDI (105kW/143PS)
  • SKODA
    • OCTAVIA III (5E3, NL3, NR3)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (110kW/150PS)
      • 1.6 TDI (66kW/90PS)
      • 2.0 TDI (105kW/143PS)
      • 2.0 TDI RS (135kW/184PS)
      • 1.6 TDI (81kW/110PS)
      • 1.6 TDI 4x4 (77kW/105PS)
      • 2.0 TDI 4x4 (110kW/150PS)
      • 2.0 TDI / TDI RS 4x4 (135kW/184PS)
      • 1.6 TDI 4x4 (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
      • 1.6 TDI 4x4 (85kW/115PS)
    • OCTAVIA III Combi (5E5, 5E6)
      • 1.6 TDI (77kW/105PS)
      • 2.0 TDI (110kW/150PS)
      • 1.6 TDI (66kW/90PS)
      • 2.0 TDI (105kW/143PS)
      • 1.6 TDI 4x4 (77kW/105PS)
      • 2.0 TDI 4x4 (110kW/150PS)
      • 2.0 TDI RS (135kW/184PS)
      • 1.6 TDI (81kW/110PS)
      • 2.0 TDI / TDI RS 4x4 (135kW/184PS)
      • 1.6 TDI 4x4 (81kW/110PS)
      • 1.6 TDI (85kW/115PS)
      • 1.6 TDI 4x4 (85kW/115PS)
    • SUPERB III (3V3)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (140kW/190PS)
      • 1.6 TDI (88kW/120PS)
      • 2.0 TDI 4x4 (140kW/190PS)
      • 2.0 TDI 4x4 (110kW/150PS)
    • SUPERB III Universālis (3V5)
      • 1.6 TDI (88kW/120PS)
      • 2.0 TDI (110kW/150PS)
      • 2.0 TDI (140kW/190PS)
      • 2.0 TDI 4x4 (140kW/190PS)
      • 2.0 TDI 4x4 (110kW/150PS)
    • KODIAQ I (NS6, NS7, NV7)
      • 2.0 TDI 4x4 (110kW/150PS)
      • 2.0 TDI 4x4 (140kW/190PS)
      • 2.0 TDI 4x4 (130kW/177PS)
    • KAROQ (NU7, ND7)
      • 1.6 TDI (85kW/115PS)
      • 2.0 TDI 4x4 (110kW/150PS)
      • 2.0 TDI 4x4 (140kW/190PS)
    • SCALA (NW1)
      • 1.6 TDI (85kW/116PS)
      • 1.6 TDI (70kW/95PS)
    • KAMIQ (NW4)
      • 1.6 TDI (85kW/115PS)
AUDI
04L 121 026Q 04L 121 026AF
PORSCHE
04L 121 026Q 04L 121 026AF
SEAT
04L 121 026AF 04L 121 026Q
SKODA
04L 121 026Q 04L 121 026AF
VW
04L 121 026AF 04L 121 026Q
VAG
04L 121 026AF 04L 121 026Q
CUPRA
04L 121 026AF 04L 121 026Q
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