OE part number 21789 is a Catalyst converter compatible with ABARTH, ALFA ROMEO and other makes. Available from 8 brands, priced from £302.99. Every cross-reference listed below matches the same OE specification used by the vehicle manufacturer.
Catalyst converter OE 21789 prices range from £302.99 to £506.99, with 8 brands offering compatible parts.
Matching wiper blade, exhaust pipe and sensor, wheel speed are cross-referenced to OE 21789 by aftermarket manufacturers as equivalents to the original catalyst converter — verify fitment and emissions compliance before ordering.
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Related cross-references
Cross-reference numbers associated with 21789 — including both OEM part numbers and aftermarket alternatives. Each entry links to its own compatibility and pricing page.
OE 21789 fits vehicles from ABARTH, ALFA ROMEO, ASTON MARTIN and other compatible models listed below.
What part type is 21789?
OE 21789 is an original equipment reference for a Catalyst converter. It identifies the exact part specification used by the vehicle manufacturer.
How much does Catalyst converter 21789 cost?
Replacement parts for OE 21789 cost between £302.99 and £506.99, depending on brand and specification.
Which brands make Catalyst converter 21789?
NTY, EEC, BOSAL, WALKER, BM CATALYSTS all offer compatible replacements for OE 21789.
Is 21789 original equipment or aftermarket?
OE 21789 is an original equipment reference assigned by the vehicle manufacturer. The parts listed below are quality-matched aftermarket and OEM-equivalent replacements that meet the same specification.
What is OE number 21789?
OE (Original Equipment) number 21789 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 8 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 21789.
