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FEBI BILSTEIN FEBI BILSTEIN 40723 Coolant Reservoir Cap 40723

FEBI BILSTEIN 40723 Coolant Reservoir Cap

Compatible with AUDI A6 C5 (4B2, 4B4) , AUDI A6 C5 Avant (4B5, 4B6) , AUDI A6 C6 (4F2) Show more info
Ensures proper sealing of the coolant reservoir. Maintains optimal system pressure for efficient cooling.
6.42 EUR
inc. VAT 21%
In stock 24
Delivery 1 day (15.05.2026)
PN 40723
Make FEBI BILSTEIN
EAN 4027816407232

This FEBI BILSTEIN coolant reservoir cap, part number 40723, is designed to provide a secure and reliable seal for your vehicle's coolant expansion tank. A properly functioning cap is crucial for maintaining the correct pressure within the cooling system. This pressure regulation is essential for preventing the coolant from boiling at higher temperatures and for ensuring efficient heat transfer away from the engine. Crafted with quality materials, this cap is built to withstand the demanding conditions of the engine bay, including temperature fluctuations and exposure to various fluids. Its precise fitment ensures it integrates seamlessly with the reservoir, preventing leaks and maintaining the integrity of the cooling system. Regular inspection and replacement of the coolant reservoir cap can help prevent potential overheating issues and costly engine damage. Choosing a FEBI BILSTEIN cap ensures you are fitting a component designed for durability and performance.

  • Direct replacement for original equipment.
  • Ensures proper sealing of the coolant reservoir.
  • Maintains correct system pressure.
  • Helps prevent coolant boiling.
  • Durable construction for longevity.
  • Designed for specific vehicle applications.
  • Part number: 40723
  • Brand: FEBI BILSTEIN
Color
blue
Material
Plastic
Opening pressure [bar]
+15
OE-number
8E0 121 321
  • AUDI
    • A6 C5 (4B2, 4B4)
      • 1.8 T (110kW/150PS)
      • 1.8 T quattro (110kW/150PS)
      • 2.4 (100kW/136PS)
      • 2.5 TDI (132kW/180PS)
      • 2.5 TDI quattro (132kW/180PS)
      • 2.0 (96kW/130PS)
      • 3.0 (162kW/220PS)
      • 3.0 quattro (162kW/220PS)
      • 2.4 (125kW/170PS)
      • 2.4 quattro (125kW/170PS)
      • 2.5 TDI (114kW/155PS)
      • 2.7 T quattro (184kW/250PS)
      • 1.9 TDI (96kW/130PS)
      • 2.4 (120kW/163PS)
      • 2.5 TDI (120kW/163PS)
      • 3.0 (160kW/218PS)
    • A6 C5 Avant (4B5, 4B6)
      • 1.8 T (110kW/150PS)
      • 1.8 T quattro (110kW/150PS)
      • 2.4 (100kW/136PS)
      • 2.5 TDI (132kW/180PS)
      • 2.5 TDI quattro (132kW/180PS)
      • 2.0 (96kW/130PS)
      • 2.4 (125kW/170PS)
      • 2.4 quattro (125kW/170PS)
      • 2.5 TDI (114kW/155PS)
      • 2.7 T quattro (184kW/250PS)
      • 3.0 (162kW/220PS)
      • 3.0 quattro (162kW/220PS)
      • 1.9 TDI (96kW/130PS)
      • 2.4 (120kW/163PS)
      • 2.5 TDI (120kW/163PS)
      • 3.0 (160kW/218PS)
      • 3.0 quattro (160kW/218PS)
    • A6 C6 (4F2)
      • 3.0 TFSI quattro (220kW/299PS)
      • 3.2 FSI (195kW/265PS)
      • 2.4 (130kW/177PS)
      • 3.2 FSI (188kW/255PS)
      • 3.2 FSI quattro (188kW/255PS)
      • 2.0 TDI (103kW/140PS)
      • 4.2 quattro (246kW/335PS)
      • 3.0 TDI quattro (165kW/225PS)
      • 3.0 TDI quattro (155kW/211PS)
      • 2.7 TDI (132kW/180PS)
      • 2.7 TDI (120kW/163PS)
      • 2.4 quattro (130kW/177PS)
      • 2.7 TDI quattro (132kW/180PS)
      • 2.0 TFSI (125kW/170PS)
      • 2.0 TDI (100kW/136PS)
      • 2.7 TDI quattro (120kW/163PS)
      • S6 quattro (320kW/435PS)
      • 4.2 FSI quattro (257kW/350PS)
      • 2.8 FSI (154kW/210PS)
      • 3.0 quattro (160kW/218PS)
      • 2.8 FSI quattro (154kW/210PS)
      • 2.0 TDI (89kW/121PS)
      • 2.0 TDI (125kW/170PS)
      • 2.7 TDI (140kW/190PS)
      • 2.7 TDI quattro (140kW/190PS)
      • 2.8 FSI (140kW/190PS)
      • 2.8 FSI quattro (140kW/190PS)
      • 2.8 FSI quattro (162kW/220PS)
      • 2.8 FSI (162kW/220PS)
      • 3.0 TDI quattro (176kW/240PS)
      • 3.0 TFSI quattro (213kW/290PS)
    • A6 C6 Avant (4F5)
      • 3.0 TFSI quattro (220kW/299PS)
      • 2.0 TDI (103kW/140PS)
      • 2.7 TDI (120kW/163PS)
      • 3.0 TDI quattro (165kW/225PS)
      • 3.2 FSI (188kW/255PS)
      • 3.2 FSI quattro (188kW/255PS)
      • 4.2 quattro (246kW/335PS)
      • 2.4 (130kW/177PS)
      • 2.4 quattro (130kW/177PS)
      • 3.0 TDI quattro (155kW/211PS)
      • 2.7 TDI (132kW/180PS)
      • 2.7 TDI quattro (132kW/180PS)
      • 2.0 TFSI (125kW/170PS)
      • 2.0 TDI (100kW/136PS)
      • 2.7 TDI quattro (120kW/163PS)
      • S6 quattro (320kW/435PS)
      • 4.2 FSI quattro (257kW/350PS)
      • 2.8 FSI (154kW/210PS)
      • 3.0 quattro (160kW/218PS)
      • 2.8 FSI quattro (154kW/210PS)
      • 2.0 TDI (89kW/121PS)
      • 2.0 TDI (125kW/170PS)
      • 2.7 TDI (140kW/190PS)
      • 2.7 TDI quattro (140kW/190PS)
      • 2.8 FSI (140kW/190PS)
      • 2.8 FSI (162kW/220PS)
      • 2.8 FSI quattro (140kW/190PS)
      • 2.8 FSI quattro (162kW/220PS)
      • 3.0 TDI quattro (176kW/240PS)
      • 3.0 TFSI quattro (213kW/290PS)
      • 3.0 (160kW/218PS)
      • 2.0 TDI (120kW/163PS)
    • A4 B6 (8E2)
      • 1.8 T (110kW/150PS)
      • 2.0 (96kW/130PS)
      • 1.8 T quattro (110kW/150PS)
      • 3.0 (162kW/220PS)
      • 3.0 quattro (162kW/220PS)
      • 1.9 TDI (96kW/130PS)
      • 2.5 TDI quattro (132kW/180PS)
      • 1.6 (75kW/102PS)
      • 2.5 TDI (114kW/155PS)
      • 1.9 TDI (74kW/101PS)
      • 2.4 (125kW/170PS)
      • 2.0 FSI (110kW/150PS)
      • 1.9 TDI quattro (96kW/130PS)
      • 1.8 T (120kW/163PS)
      • 1.8 T quattro (120kW/163PS)
      • 2.5 TDI (120kW/163PS)
      • 2.4 (120kW/163PS)
      • S4 quattro (253kW/344PS)
      • 1.8 T (140kW/190PS)
      • 1.8 T quattro (140kW/190PS)
      • 1.9 TDI (85kW/116PS)
      • 3.0 (160kW/218PS)
      • 3.0 quattro (160kW/218PS)
    • A4 B6 Avant (8E5)
      • 1.6 (75kW/102PS)
      • 2.0 (96kW/130PS)
      • 1.8 T (110kW/150PS)
      • 3.0 (162kW/220PS)
      • 1.9 TDI (96kW/130PS)
      • 2.4 (125kW/170PS)
      • 2.5 TDI quattro (132kW/180PS)
      • 2.5 TDI (114kW/155PS)
      • 1.8 T quattro (110kW/150PS)
      • 3.0 quattro (162kW/220PS)
      • 1.9 TDI (74kW/101PS)
      • 1.9 TDI quattro (96kW/130PS)
      • 2.0 FSI (110kW/150PS)
      • 1.8 T (120kW/163PS)
      • 1.8 T quattro (120kW/163PS)
      • 2.5 TDI (120kW/163PS)
      • 2.4 (120kW/163PS)
      • 1.8 T (140kW/190PS)
      • 1.8 T quattro (140kW/190PS)
      • S4 quattro (253kW/344PS)
      • 1.9 TDI (85kW/116PS)
      • 3.0 (160kW/218PS)
      • 3.0 quattro (160kW/218PS)
    • A4 B6 Kabriolets (8H7)
      • 2.4 (125kW/170PS)
      • 3.0 (162kW/220PS)
      • 2.4 (120kW/163PS)
      • 2.5 TDI (120kW/163PS)
      • 1.8 T (120kW/163PS)
      • 1.8 T quattro (120kW/163PS)
      • 3.0 quattro (162kW/220PS)
      • S4 quattro (253kW/344PS)
      • 2.0 (96kW/130PS)
      • 3.0 (160kW/218PS)
    • A8 D3 (4E2, 4E8)
      • 4.2 quattro (246kW/335PS)
      • 3.7 quattro (206kW/280PS)
      • 4.0 TDI quattro (202kW/275PS)
      • 3.0 (162kW/220PS)
      • 6.0 W12 quattro (331kW/450PS)
      • 3.0 TDI quattro (171kW/233PS)
      • 3.2 FSI (191kW/260PS)
      • 3.2 FSI quattro (191kW/260PS)
      • 4.2 TDI quattro (235kW/320PS)
      • 3.0 (160kW/218PS)
      • 3.0 TDI quattro (155kW/211PS)
      • S8 quattro (331kW/450PS)
      • 4.2 TDI quattro (240kW/326PS)
      • 4.2 FSI quattro (257kW/350PS)
      • 2.8 FSI (154kW/210PS)
    • A6 Allroad C6 (4FH)
      • 3.2 FSI quattro (188kW/255PS)
      • 4.2 FSI quattro (257kW/350PS)
      • 3.0 TDI quattro (171kW/233PS)
      • 2.7 TDI quattro (132kW/180PS)
      • 3.0 TDI quattro (155kW/211PS)
      • 2.7 TDI quattro (120kW/163PS)
      • 2.7 TDI quattro (140kW/190PS)
      • 3.0 TDI quattro (176kW/240PS)
      • 3.0 TFSI quattro (213kW/290PS)
AUDI
8E0 121 321
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