Details
- Transmission Code
- A/T, M/T
Compare 1 brand — check fitment and order online
OE part number 3C0121157AA is a Radiator Hose compatible with AUDI, SEAT and other makes. Available from 1 brands, priced from £30.99. Every cross-reference listed below matches the same OE specification used by the vehicle manufacturer.
Original installation position for OE 3C0121157AA. The red ring marks where this part installs on the vehicle.

OEM workshop diagram — sourced from manufacturer parts catalogue.
OE 3C0121157AA is compatible with the following make/model combinations:
| Make | Models |
|---|---|
| VW | GOLF V (1K1), TOURAN (1T1, 1T2), CADDY III Box Body/MPV (2KA, 2KH, 2CA, 2CH), GOLF PLUS V (5M1, 521) +2 |
| SEAT | ALTEA XL (5P5, 5P8) |
| SKODA | OCTAVIA II Combi (1Z5) |
| AUDI | A3 (8P1), A3 Sportback (8PA) |
Products matched to OE number 3C0121157AA.
| Attribute | Value |
|---|---|
| Inner Diameter 2 [mm] | 34 |
| Hose Length [mm] | 280 |
| Hose Length [mm] | 325 |
| Cooling Hose | from coolant regulator housing to water pipe |
| Inner Diameter 1 [mm] | 8 |
| Length [mm] | 650 |
| Weight [g] | 500 |
| Charge Type | 1 |
| Hose Length [mm] | 540 |
| Inner Diameter 1 [mm] | 10 |
Common original equipment numbers linked to stocked alternatives.
OE (Original Equipment) number 3C0121157AA is a manufacturer's reference code for Radiator Hose used to identify the exact specification of a part fitted during vehicle production. By cross-referencing this OE number, you can find 1 compatible aftermarket brands that match the same specification — often at a lower price than the original. All parts listed above are verified to match OE 3C0121157AA.