Heater Hose Connector – 3B0 122 291B (URO)

The 3B0122291B Heater Hose Connector by URO Parts is an OE‑style replacement connector used on various Volkswagen and Audi models. This fitting joins heater and/or coolant hoses at the firewall or engine area, providing a secure, leak‑free junction so coolant can circulate properly through the heater core and engine cooling system.

Over time, the original plastic connector can become brittle from constant heat cycles and exposure to coolant, leading to cracked bodies, broken hose barbs, or distorted sealing surfaces. This often results in coolant leaks, low‑coolant warnings, and poor heater performance. Replacing the failed piece with this URO 3B0122291B connector restores a solid hose connection and reliable coolant flow to the heater circuit.

• OEM reference: 3B0 122 291B
• Brand: URO Parts – OE‑style European replacement supplier
• Precision‑molded plastic construction for proper fit and hose alignment
• Designed to provide a tight, leak‑free connection between heater/coolant hoses
• Direct‑fit replacement for the original connector; no modifications required
• Cost‑effective alternative to dealer parts with OE‑style performance

Applications

Used on select Volkswagen and Audi models that specify heater hose connector part number 3B0122291B.
Applications vary by engine and model year; confirm by catalog or VIN.

Always verify compatibility via VIN and by matching the part number and hose configuration on your existing connector before ordering.

Service Notes

• Replace any attached O‑rings and hose clamps to ensure a long‑lasting seal.
• Refill with approved VW/Audi G12++/G13 coolant and bleed the cooling system after service.
• Inspect nearby plastic fittings and hoses; replacing aging components together can prevent future leaks.