Coolant Hose Flange – 5Q0 122 291H (Bogap)

Description

The 5Q0 122 291H Coolant Connector by Bogap is an OE-quality replacement hose flange engineered for select 2.0T turbocharged MQB-platform vehicles from Volkswagen and Audi. Installed within the engine cooling circuit, this fitting serves as a sealed junction between coolant hoses and the engine or radiator assembly — maintaining correct coolant routing among the engine block, radiator, and heater circuit under full system pressure and sustained operating temperatures. Bogap manufactures to OE dimensional and material specifications, making this a reliable direct-fit replacement that avoids the higher cost of sourcing a genuine VAG part without sacrificing fit or sealing performance.

Over time, the original plastic body of the 5Q0 122 291H coolant connector weakens from the repeated stress of heat cycling, coolant pressure, and engine vibration. Hairline cracks typically initiate at the hose barb connections and port sealing surfaces, where mechanical stress concentrates most. Even minor cracking at these points allows coolant to escape past the hose connections, triggering persistent low-coolant warnings and, if left unaddressed, escalating to significant coolant loss and the risk of engine overheating. Replacing the failing fitting with a new Bogap 5Q0 122 291H connector restores a factory-correct seal and dependable cooling system operation.

Why Choose Bogap for the 5Q0 122 291H Coolant Connector

Bogap is a European OE-quality parts manufacturer that produces cooling system components to match the original equipment specifications of major VAG-platform vehicles. Their 5Q0 122 291H coolant connector is manufactured to the same dimensional tolerances as the genuine part — ensuring correct hose seating, port geometry, and sealing surface integrity. For owners seeking a balance between OE fitment quality and value, Bogap delivers a dependable alternative to the genuine VAG part without requiring any modifications or adaptations.

Signs Your Coolant Hose Connector Needs Replacing

Catching a failing coolant connector early prevents progressive cooling system damage. Watch for these warning signs:

• Coolant seeping, staining, or drying around the connector body or at any hose connection point in the cooling circuit

• Recurring low coolant level warnings despite topping off, with no visible external leak source elsewhere

• A sweet coolant odor from the engine bay after the engine reaches normal operating temperature

• Visible surface cracking, crazing, or discoloration on the plastic connector body or port barbs

• Any coolant hose that feels loose or fails to seat securely at the connector port

If any of these symptoms appear, replace the 5Q0 122 291H coolant connector promptly and pressure-test the cooling system before returning the vehicle to service.

5Q0 122 291H Coolant Connector — Key Features

• OEM Reference: 5Q0 122 291H (cross-reference: 5QD 122 291M)

• Brand: Bogap — European OE-quality replacement manufacturer

• OE-quality coolant hose flange/connector for 2.0T MQB-platform applications

• Precision-molded housing engineered to OE geometry for correct hose seating and sealing surface integrity

• Designed to withstand continuous system pressure, elevated coolant temperatures, and sustained thermal cycling

• Compatible with factory-style G12++/G13 coolant chemistry

• Direct-fit replacement — no modifications required

Service Notes for the 5Q0 122 291H Coolant Connector

• First, inspect all connected hoses for softness, swelling, or surface cracking; replacing hoses and the connector together at the same service interval is best practice

• Next, replace all hose clamps and O-rings at the connector ports — reusing old hardware on a new fitting can result in an immediate post-installation leak

• Also, verify each hose seats and locks fully at its respective port before pressurizing the system

• Then, refill with the correct VW/Audi-approved coolant (G12++/G13 per your owner’s manual) — never mix coolant types

• Finally, bleed the cooling system completely to eliminate air pockets before returning the vehicle to service; trapped air can cause false temperature readings and heater performance issues

5Q0 122 291H Coolant Connector — Compatibility & Applications

Always verify fitment by VIN before ordering. Multiple variants may exist within the same model year.

Cross Reference Numbers

• 5Q0 122 291H (VAG OEM reference)

• 5QD 122 291M (VAG cross-reference)

Additional information