Details
- Weight [kg]
- 0,38 kg
- Guarantee
- 3
Compare 26 brands — check fitment and order online
OE part number 03L121111AD is a Coolant thermostat compatible with AUDI, BMW and other makes. Available from 26 brands, priced from £22.99. Every cross-reference listed below matches the same OE specification used by the vehicle manufacturer.
Coolant thermostat OE 03L121111AD prices range from £22.99 to £64.99, with 26 brands offering compatible parts.
Original installation position for OE 03L121111AD. The red ring marks where this part installs on the vehicle.

OEM workshop diagram — sourced from manufacturer parts catalogue.
OE 03L121111AD is compatible with the following make/model combinations:
| Make | Models |
|---|---|
| AUDI | A4 B8 Avant (8K5), A4 B8 (8K2), Q5 (8RB), A5 Sportback (8TA) +5 |
| SEAT | EXEO (3R2) |
Choose a brand to see their compatible parts for OE 03L121111AD.
Products matched to OE number 03L121111AD.
| Attribute | Value |
|---|---|
| Height 1 [mm] | 26 |
| Diameter 1 [mm] | 67,0 |
| Height 1 [mm] | 25,5 |
| Housing Type | 30 |
| Quality | OE EQUIVALENT |
| Operating Mode | Electric |
| Supplementary Article/Supplementary Info | 19 |
| Housing material | 1 |
| Operating Mode | pneumatic |
| Diameter [mm] | 44 |
Common original equipment numbers linked to stocked alternatives.
OE (Original Equipment) number 03L121111AD is a manufacturer's reference code for Coolant thermostat used to identify the exact specification of a part fitted during vehicle production. By cross-referencing this OE number, you can find 26 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 03L121111AD.