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TOPRAN TOPRAN 638 754 Thermostat 638754

TOPRAN 638 754 Thermostat

Compatible with VW GOLF VII Variant (BA5, BV5) , AUDI A3 Limousine (8VS, 8VM) , AUDI A3 (8V1, 8VK) Show more info
Ensures optimal engine temperature by regulating coolant flow. Essential for efficient engine operation and preventing overheating.
4.92 EUR
inc. VAT 21%
In stock 8
Delivery 1 day (15.05.2026)
PN 638 754
Make TOPRAN

This TOPRAN thermostat (part code 638 754) is designed to maintain your engine's ideal operating temperature. It precisely controls the flow of coolant through the radiator, opening and closing as needed to keep the engine from overheating or running too cold. A properly functioning thermostat is crucial for engine efficiency, fuel economy, and longevity. It helps the engine reach its optimal working temperature quickly after a cold start, reducing wear and emissions. When the engine reaches its operating temperature, the thermostat opens to allow coolant to circulate through the radiator, dissipating excess heat. If your thermostat is faulty, you may experience symptoms such as the engine overheating, the temperature gauge fluctuating erratically, or poor heater performance. Replacing a faulty thermostat with a reliable part like this TOPRAN unit is essential for maintaining your vehicle's performance and preventing costly engine damage.

  • Regulates engine coolant flow for optimal temperature control.
  • Helps prevent engine overheating and premature wear.
  • Contributes to improved fuel efficiency.
  • Ensures consistent cabin heating performance.
  • Designed for reliable and long-lasting operation.
  • Direct replacement for original equipment.
  • Part number: 638 754
  • Brand: TOPRAN
Outer diameter [mm]
41,7
Additional article/Additional info 2
Thermostat built into the water pump
Opening temperature
+80
  • VW
    • GOLF VII Variant (BA5, BV5)
      • 1.4 TSI (103kW/140PS)
      • 1.4 TGI CNG (81kW/110PS)
      • 1.4 TSI (90kW/122PS)
      • 1.4 TSI MultiFuel (90kW/122PS)
      • 1.4 TSI (92kW/125PS)
      • 1.4 TSI (110kW/150PS)
      • 1.4 TSI MultiFuel (92kW/125PS)
      • 1.0 TSI (85kW/115PS)
    • GOLF SPORTSVAN VII (AM1, AN1)
      • 1.4 TSI (110kW/150PS)
      • 1.4 TSI (92kW/125PS)
      • 1.4 TSI MultiFuel (92kW/125PS)
    • GOLF VII (5G1, BQ1, BE1, BE2)
      • 1.4 GTE Hybrid (150kW/204PS)
      • 1.0 TSI (85kW/115PS)
    • POLO V (6R1, 6C1)
      • 1.6 (81kW/110PS)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
      • 1.6 (66kW/90PS)
    • PASSAT B8 (3G2, CB2)
      • 1.4 GTE Hybrid (160kW/218PS)
    • PASSAT B8 Variant (3G5, CB5)
      • 1.4 GTE Hybrid (160kW/218PS)
    • ARTEON (3H7, 3H8)
      • 1.4 eHybrid (160kW/218PS)
    • ARTEON SHOOTING BRAKE (3H9)
      • 1.4 eHybrid (160kW/218PS)
  • AUDI
    • A3 Limousine (8VS, 8VM)
      • 1.4 TFSI (90kW/122PS)
      • 1.2 TFSI (77kW/105PS)
      • 1.4 TFSI (92kW/125PS)
      • 1.4 TFSI (103kW/140PS)
      • 1.2 TFSI (81kW/110PS)
      • 1.4 TSI (110kW/150PS)
    • A3 (8V1, 8VK)
      • 1.4 TFSI (90kW/122PS)
      • 1.4 TFSI (103kW/140PS)
      • 1.2 TFSI (77kW/105PS)
      • 1.2 TFSI (81kW/110PS)
      • 1.4 TFSI (92kW/125PS)
      • 1.4 TSI (110kW/150PS)
    • A3 Sportback (8VA, 8VF)
      • 1.4 TFSI (90kW/122PS)
      • 1.4 TFSI (103kW/140PS)
      • 1.2 TFSI (77kW/105PS)
      • 1.4 TFSI g-tron (81kW/110PS)
      • 1.2 TFSI (81kW/110PS)
      • 1.4 TFSI (92kW/125PS)
      • 1.4 TSI (110kW/150PS)
      • 1.4 TFSI e-tron (150kW/204PS)
    • Q3 (8UB, 8UG)
      • 1.4 TSI (110kW/150PS)
      • 1.4 TFSI (92kW/125PS)
    • A1 (8X1, 8XK)
      • 1.4 TFSI (92kW/125PS)
      • 1.4 TSI (110kW/150PS)
      • 1.0 TFSI (70kW/95PS)
      • 1.0 TFSI (60kW/82PS)
    • A1 Sportback (8XA, 8XF)
      • 1.4 TFSI (92kW/125PS)
      • 1.4 TSI (110kW/150PS)
      • 1.0 TFSI (70kW/95PS)
      • 1.0 TFSI (60kW/82PS)
  • SEAT
    • IBIZA IV (6J5, 6P1)
      • 1.0 TSI (81kW/110PS)
      • 1.0 TSI (70kW/95PS)
    • IBIZA IV ST (6J8, 6P8)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • LEON (5F1)
      • 1.0 TSI (85kW/115PS)
    • LEON ST (5F8)
      • 1.0 TSI (85kW/115PS)
    • ATECA (KH7, KHP)
      • 1.0 TSI (85kW/116PS)
    • TOLEDO IV (KG3)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • LEON (KL1, KLG)
      • 1.6 SRE (81kW/110PS)
    • LEON Sportstourer (KL8, KLD)
      • 1.6 SRE (81kW/110PS)
  • SKODA
    • OCTAVIA III (5E3, NL3, NR3)
      • 1.0 TSI (85kW/115PS)
    • OCTAVIA III Combi (5E5, 5E6)
      • 1.0 TSI (85kW/115PS)
    • FABIA III (NJ3)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • FABIA III Universālis (NJ5)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • KAROQ (NU7, ND7)
      • 1.0 TSI (85kW/116PS)
    • RAPID (NH3, NK3, NK6)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • RAPID Spaceback (NH1)
      • 1.0 TSI (70kW/95PS)
      • 1.0 TSI (81kW/110PS)
    • SUPERB III (3V3)
      • 1.4 TSI iV (160kW/218PS)
    • SUPERB III Universālis (3V5)
      • 1.4 TSI iV (160kW/218PS)
AUDI
04E 121 113C
PORSCHE
04E 121 113C
SEAT
04E 121 113C
SKODA
04E 121 113C
VW
04E 121 113C
VAG
04E 121 113C
CUPRA
04E 121 113C
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