The 8W0 122 293A is a Genuine Audi OE upper coolant hose coupling for the Audi A4 (B9), A4 allroad, A5, and A5 Sportback equipped with the 2.0L 45 TFSI petrol engine (2017–2020). Positioned at the water pump housing, this flange connects the upper radiator coolant hose and includes a C-clip and seal in the box. Because this coupling is a single-use component, always install a new unit whenever the upper coolant hose is disturbed — no modifications required.
$18.00
2 in stock
The 8W0 122 293A Coolant Hose Flange is a Genuine Audi OE upper coolant hose coupling. It mounts at the water pump housing on MLB-evo B9 and F5 platform 2.0T vehicles. Specifically, it connects the upper radiator hose to the water pump outlet. This allows pressurized coolant to circulate between the engine and radiator.
Because it sits near the thermostat, port geometry here directly affects coolant flow. Furthermore, this part ships complete with its C-clip and O-ring. Therefore, no separate hardware is required for a correct installation. Additionally, the 8W0 122 293A supersedes the earlier 8W0 122 293 revision. It is the current Genuine OE reference for all B9/F5 2.0T applications. The OE specification also designates this as a single-use component — never reinstall it once removed.
The 8W0 122 293A sits directly at the water pump housing. Consequently, it endures continuous hot coolant exposure, pressure fluctuations, and thermal cycling. The thermostat-adjacent position concentrates heat stress at the sealing surface during every warm-up cycle. Over time, this causes the plastic composite to become brittle.
Hairline cracks typically develop at the hose port wall or sealing face first. Even a minor crack initiates coolant seepage at the water pump junction. As a result, low-coolant warnings appear and coolant levels drop repeatedly. If seepage progresses, sustained coolant loss and engine overheating follow. Therefore, replacing the 8W0 122 293A promptly protects the 2.0T engine from heat damage.
The 8W0 122 293A comes from Genuine Audi OE supply. It meets the same material grade, wall thickness, port geometry, and sealing finish Audi originally specified. As a result, the C-clip locks securely into the water pump housing groove. Moreover, the O-ring compresses correctly and the hose port holds the interference fit under operating pressure.
Aftermarket alternatives frequently use lower-grade plastics. Those materials degrade faster under sustained 2.0T engine bay heat. Therefore, choosing the Genuine OE part eliminates fitment uncertainty from the first startup. Furthermore, because the C-clip and seal ship pre-matched, the entire upper hose junction replaces in a single step.
Catching a failing 8W0 122 293A early prevents coolant loss and engine damage. Therefore, watch for these warning signs:
Coolant weeping, staining, or dried deposits around the water pump housing or upper hose junction
Recurring low coolant warning light without an obvious external leak source
A sweet coolant odor near the water pump after reaching operating temperature
Visible cracking, crazing, or discoloration on the flange body or C-clip groove
A loose or improperly seating upper hose at the water pump port
Engine temperature rising above the normal operating range
If any of these symptoms appear, replace the flange immediately. Additionally, pressure-test the cooling system before returning the vehicle to service.
OEM Reference: 8W0 122 293A (Genuine Audi OE — supersedes 8W0 122 293)
Upper coolant hose coupling at the water pump housing — MLB-evo B9/F5 2.0T position
Supplied complete with retaining C-clip and sealing O-ring
Factory-spec plastic/composite for coolant and sustained heat resistance
Precision port geometry ensures correct hose fit and leak-free sealing under pressure
Single-use, non-reusable — replace with a new unit every time the upper hose is detached
Covers Audi A4, A4 Quattro, A4 allroad (2017–2020) and A5 Quattro, A5 Sportback (2018–2020)
Direct-fit replacement — no modifications required
First, never reinstall a removed 8W0 122 293A — always fit a new unit when the upper hose is detached
Next, use only the supplied C-clip and O-ring — reusing old sealing hardware risks an immediate repeat leak
Also, inspect the upper radiator hose for softness or cracking; replace the hose and flange together for efficiency
Then, confirm the C-clip engages with a firm, audible click before pressurizing the system
Also, refill with Audi-approved G13 coolant at the correct concentration per the owner’s manual
Finally, bleed the cooling system completely to eliminate air pockets that cause overheating and erratic temperature readings
Always verify fitment by VIN before ordering. Multiple variants may exist within the same model year
8W0 122 293A (Genuine Audi OE — current revision)
8W0 122 293 (earlier revision — superseded)
| Weight | 0.25 lbs |
|---|---|
| Dimensions | 6.0 × 4.0 × 3.0 in |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2017, 2020 | Audi | A3 | 2.0T | |
| 2018, 2020 | Audi | A5 | 2.0T | |
| 2018, 2020 | Audi | A5 Sportback | 2.0T |
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