The 1J0 121 087B coolant hose flange is an OE-quality Y-shaped, 3-way direct-fit replacement for select Volkswagen and Audi 1.9 TDI vehicles. Correct fit and reliable sealing with no modifications required.
$9.00
The 1J0 121 087B coolant hose flange is an OE-quality replacement fitting used on select Volkswagen and Audi models equipped with 1.9 TDI engines. This Y-shaped, 3-way connector sits along the upper radiator hose line, serving as a critical junction that branches coolant flow between the radiator, engine block, and expansion tank. Proper function at this connection point is essential for maintaining stable engine operating temperatures and preventing coolant loss.
The original plastic housing is subjected to constant heat cycling, cooling system pressure, and vibration. Over time, the material becomes brittle, leading to hairline cracks or complete failure at the hose barbs — resulting in sudden coolant loss, low-coolant warnings, and potential engine overheating. Replacing the worn unit with a new 1J0 121 087B restores a secure, leak-free junction and dependable cooling system performance.
A failing coolant hose flange produces recognizable symptoms that worsen if left unaddressed. The most common warning signs include visible coolant seeping or dripping at the upper radiator hose area, a persistent coolant smell from the engine bay after driving, and unexplained drops in coolant reservoir level. In more advanced cases, a cracked housing may cause a sudden, significant coolant loss and rapid engine overheating. Physical inspection may reveal a visibly cracked, brittle, or residue-coated plastic housing. Prompt replacement prevents coolant loss and the risk of serious engine damage.
OEM Reference: 1J0 121 087B
OE-quality construction for precise fitment and reliable sealing
Y-shaped, 3-way connector design — 2 large and 1 small hose connection
Multi-way design engineered for correct coolant distribution and hose alignment
Durable, heat-resistant composite construction designed to withstand cooling system pressure
Precision-molded barbs for a secure, leak-free interface with all attached coolant hoses
Use new hose clamps during installation to ensure a long-lasting, leak-free seal. Inspect all connected hoses for swelling, softness, or internal cracking and replace any aged hoses at the same time to prevent future failures. After installation, refill with the VW/Audi-approved coolant mixture and properly bleed the cooling system to remove trapped air before returning the vehicle to service.
Always verify fitment by VIN before ordering.
1J0 121 087B
VAICO V108193
11954021500
1470045
902996
URO-008054
| Weight | 0.25 lbs |
|---|---|
| Dimensions | 5.0 × 4.0 × 3.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2006, 2008 | Audi | A3 | 3.2L V6 | |
| 2004, 2009 | Audi | S4 | 4.2L V8 | |
| 2008-2009 | Audi | TT | 3.2L V6 | |
| 2006 | Volkswagen | Beetle | 1.9 TDI | |
| 2009, 2015 | Volkswagen | CC | 3.6L V6 | |
| 2007 | Volkswagen | EOS | 3.2L V6 | |
| 2004, 2006 | Volkswagen | Golf IV | 1.9 TDI | |
| 2002-2003 | Volkswagen | Jetta IV | 1.9 TDI |
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