Expansion Tank, coolant4A0 121 403

Audi, CUPRA, SEAT, Škoda, and Volkswagen OE number, as listed in aftermarket supplier catalogues. Compare listings for this exact number, then confirm the part number and vehicle fitment before ordering.

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What each marketplace’s search lists for this number, lowest price first, Ovoko last. Listings can include other parts that name it.

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131 listings

Used

Checked 2026-10-29 05:10 UTC

€3.88 – €45.00Cheapest listing: + €17.00 shipping to Germanyestimated delivery in 5–7 daysView on Ovoko

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Aftermarket part numbers

Supplier articles whose catalogue lists 4A0 121 403. Check the supplier’s own restrictions before ordering.

BIRTH: 8213
HELLA: 8MA 366 365-031
MAHLE: CRT 110 000S
METZGER AUTOTEILE: 2140001
MEYLE: 100 121 0041
STELLOX: 75-51203-SX
VAICO: V10-0020
VEMA: 17095

Vehicle fitment

Engine code and production dates decide fitment. Model name and year alone don’t.

82 vehicles in 15 model series, inferred

Aftermarket parts that list 4A0 121 403 fit these vehicles according to their supplier catalogues. That does not prove 4A0 121 403 itself fits every one: check the engine code, production dates and the supplier’s restrictions on the model series’ vehicle pages.

Audi

13 model series · 80 vehicles

Audi model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
100 (4A) 1988–19988 vehicles	12/1990 – 07/1994	AAD, AAE, AAH, AAR, AAS, AAT, ABC, ABK, ABP, ACE	0588 / 504, 505, 507, 512, 513, 517, 550, 552
100 (4A) Avant8 vehicles	12/1990 – 07/1994	AAD, AAE, AAH, AAR, AAS, AAT, ABC, ABK, ABP, ACE	0588 / 524, 525, 527, 529, 530, 531, 553
100 (4A) Avant quattro6 vehicles	12/1990 – 07/1994	AAD, AAH, AAN, AAR, ABC, ABH	0588 / 526, 528, 532, 533, 555, 570
100 (4A) quattro6 vehicles	12/1990 – 07/1994	AAD, AAH, AAN, AAR, ABC, ABH	0588 / 506, 508, 514, 518, 554, 576
A6 (4A) 1994–199812 vehicles	06/1994 – 12/1998	1Z, AAE, AAH, AAR, AAT, ABC, ABK, ACE, ACK, ADR, ADW, AEL, AFC, AHU	0588 / 504, 505, 507, 513, 517, 550, 552, 583, 589, 610, 614
A6 (4A) Avant11 vehicles	06/1994 – 12/1997	1Z, AAE, AAH, AAR, AAT, ABC, ABK, ACE, ACK, ADR, AEL, AFC, AHU	0588 / 524, 525, 527, 530, 531, 551, 553, 584, 590, 602, 611, 615
A6 (4A) Avant quattro7 vehicles	06/1994 – 12/1998	AAH, AAR, ABC, ACE, ACK, ADR, AEL, AFC	0588 / 526, 528, 555, 568, 605, 613, 617
A6 (4A) quattro7 vehicles	06/1994 – 12/1998	AAH, AAR, ABC, ACE, ACK, ADR, AEL, AFC	0588 / 506, 508, 554, 567, 604, 612, 616
Coupé (8B) 1988–19965 vehicles	08/1988 – 12/1996	6A, AAD, ABK, ACE, DZ, NM	0588 / 472, 501, 556, 557
Coupé (8B) quattro3 vehicles	11/1988 – 12/1996	AAH, ABY, NM	0588 / 434, 523, 569
S6 (4A) Avant quattro3 vehicles	06/1994 – 10/1997	AAN, AEC, AHK	0588 / 533, 586 7967 / 301, 304
S6 (4A) quattro3 vehicles	06/1994 – 10/1997	AAN, AEC, AHK	0588 / 518, 585 7967 / 300, 303
S8 (4D) quattro1 vehicle	05/1999 – 12/2003	AQH, AVP, AYS, BCS	0588 / 721

Volkswagen

2 model series · 2 vehicles

Volkswagen model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
Polo 2 (80)1 vehicle1 of them: some versions only	08/1985 – 09/1994	AAK, AAU, ACM, HZ	0600 / 661, 663
Polo 2 (86)1 vehicle	08/1985 – 07/1986	HZ	0600 / 661