4D0 121 403 D · Expansion tank with coolant level switch

Discontinued — no replacement recorded

Audi discontinued 4D0121403D in October 2019 and records no replacement for it. Catalogue data: oemdiagrams.com · 09/2024 — a later replacement, or a supplier still holding stock, would not appear here.

Where no discontinuation is shown, the 09/2024 catalogue records none. That is not confirmation that the part is currently available.