Details
- Length [mm]
- 270 mm
- Weight [kg]
- 2,700 kg
- Code Letter
- 91
- Supplementary Article/Info 2
- 515
Compare 2 brands — check fitment and order online
OE part number 51780156 is a Catalyst converter compatible with ABARTH, ALFA ROMEO and other makes. Available from 2 brands, priced from £277.99. Every cross-reference listed below matches the same OE specification used by the vehicle manufacturer.
Catalyst converter OE 51780156 prices range from £277.99 to £314.99, with 2 brands offering compatible parts.
Original installation position for OE 51780156. The red ring marks where this part installs on the vehicle.

OEM workshop diagram — sourced from manufacturer parts catalogue.
OE 51780156 is compatible with the following make/model combinations:
| Make | Models |
|---|---|
| ALFA ROMEO | 159 (939), 159 Sportwagon (939) |
| OPEL | ASTRA H (A04), ASTRA H Estate (A04), ASTRA H GTC (A04), ZAFIRA / ZAFIRA FAMILY B (A05) +2 |
| FIAT | CROMA (194) |
| VAUXHALL | ASTRA Mk V (H) (A04) |
Choose a brand to see their compatible parts for OE 51780156.
Products matched to OE number 51780156.
| Attribute | Value |
|---|---|
| Length [mm] | 1400 |
| Fuel Type | 5 |
| Length [mm] | 1060 |
| Weight [kg] | 5,3 |
| Length [mm] | 910 |
| Emission Standard | 66 |
| Length [mm] | 310 |
| Quantity Unit | Set |
| Weight [kg] | 6,2 |
| Length [mm] | 1500 |
Common original equipment numbers linked to stocked alternatives.
OE (Original Equipment) number 51780156 is a manufacturer's reference code for Catalyst converter used to identify the exact specification of a part fitted during vehicle production. By cross-referencing this OE number, you can find 2 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 51780156.