Alternator Regulator021 903 803 1

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.

Lowest aftermarket price

€19.99

plus €6.95 shipping to Germany, on AUTODOC

Compare 5 listings

Compare offers

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

AUTODOCLowest price

1 listing

New

Checked 2026-05-15 13:53 UTCAftermarket parts whose suppliers list this OE number, not the original part.

€19.99Cheapest listing: HELLA 5DR 004 243-111+ €6.95 shipping to GermanyView on AUTODOC

Ovoko

4 listings

Used

Checked 2026-10-21 07:55 UTC

€76.00 – €94.00Cheapest listing: + €21.63 shipping to Germanyestimated delivery in 2–6 daysView on Ovoko

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Aftermarket part numbers

Supplier articles whose catalogue lists 021 903 803 1. Check the supplier’s own restrictions before ordering. A fitment condition under a part number is one its supplier names for at least one of the vehicles the part is listed for, not for all of them: a vehicle’s page shows which apply to it.

HELLA: 5DR 004 243-111Manufacturer Restriction: Bosch Voltage: 12 V Operating voltage: 14.4 VFitment conditions:Construction Year from: 05.1971

Vehicle fitment

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

110 vehicles in 37 model series, inferred

Aftermarket parts that list 021 903 803 1 fit these vehicles according to their supplier catalogues. That does not prove 021 903 803 1 itself fits every one: check the engine code, production dates and the supplier’s restrictions on the model series’ vehicle pages.

BMW

13 model series · 21 vehicles

BMW model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
1502 (E10)1 vehicle	09/1975 – 07/1977	M10	0005 / 381
1602 (E10)1 vehicle1 of them: some versions only	12/1967 – 07/1975	M10	0005 / 324, 372
1802 (E10)1 vehicle	04/1971 – 07/1975	M10	0005 / 365
2000 (E9)1 vehicle	10/1965 – 07/1972	M10	0005 / 336
2002 (E10)4 vehicles	02/1968 – 12/1975	M10	0005 / 354, 361, 362, 377
2500 (E3)1 vehicle	08/1968 – 04/1977	250, M30	0005 / 357
2500 (E9)1 vehicle	09/1974 – 04/1977	M30	0005 / 380
2800 (E3)1 vehicle	10/1968 – 04/1977	M30	0005 / 358, 383
2800 (E9)1 vehicle	01/1969 – 04/1971	M30	0005 / 359
3.0 (E3)2 vehicles	05/1971 – 04/1977	M30	0005 / 370, 371
3.0 (E9)2 vehicles	05/1971 – 04/1977	M30	0005 / 363, 364
5 (E12)3 vehicles	10/1973 – 07/1977	M30	0005 / 375, 382, 395
(E3) L2 vehicles	01/1974 – 04/1977	M30	0005 / 378, 384

Citroën

10 model series · 32 vehicles

Citroën model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
2 CV3 vehicles	01/1970 – 07/1990	A06/635, A06/664, A79/1	Not listed
2CV1 vehicle	03/1963 – 02/1970	A790D, A792H	3001 / 325
AX12 vehicles1 of them: some versions only	09/1986 – 12/1997	C3A, H1A, H1B, K1F, K1G, K2A, K2B, M4A, TU1, TU1CP (HAZ), TU1M (HDZ), TU3-2, TU3CP (KAY), TU3F (KDY), TU3FM (KDY), TU3M (KDZ), TU9M (CDY), TU9M (CDZ), TUD3 (K9A), TUD3Y (K9Y)	3001 / 216, 451, 452, 453, 461, 462, 471, 472, 473, 480, 483, 663
CX I 1973–19853 vehicles	10/1975 – 06/1982	M22621, M23622, M23623	3001 / 371, 374, 377, 386, 387
CX I Break2 vehicles	08/1976 – 06/1983	M23622, M23623	3001 / 375, 390, 403
Dyane2 vehicles	03/1968 – 12/1980	AYA2 (A791), M281 (AK2)	3001 / 302, 315, 350
GS4 vehicles	04/1970 – 06/1980	G11/631, G11631, G12611, G13625	3001 / 307, 378, 393, 397, 493
GS Break2 vehicles	04/1973 – 06/1980	G12611, G13625	3001 / 308, 392
LN1 vehicle	11/1976 – 07/1979	R06627	3001 / 376
Visa2 vehicles	09/1978 – 09/1988	1095D, V06630, V06644	3001 / 382, 383, 395, 494, 495

Renault

8 model series · 43 vehicles

Renault model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
R127 vehicles	1969 – 12/1989	80720, 810-02, 81002, 81005, 81006, 82120	3004 / 340, 350, 353, 356
R 12 Break2 vehicles	1970 – 12/1989	810-02	Not listed
R 145 vehicles	05/1976 – 12/1983	129, 150, X5J	3004 / 368, 395
R166 vehicles	04/1965 – 08/1980	69710, 80703, 80704, 80705, 82101, 82102, 82103, 82104, 84101, 84301, 84302	3004 / 331, 333, 337, 341, 342, 351, 355, 360
R183 vehicles2 of them: some versions only	04/1978 – 07/1986	841, 847 720, 847 722, A6M	3004 / 373, 374, 377, 378, 401, 403
R203 vehicles	10/1975 – 12/1983	829, 82900, 843, 84320, 84321	3004 / 362, 370, 371
R47 vehicles2 of them: some versions only	10/1962 – 06/1990	688 711, 688 712, 800, 800 01, 800 05, 800 705, 839 06, 839 07, 839 706, 839 707, B1B 707, C1E 714, C1E 718, C1E 719	3004 / 005, 304, 318, 320, 361, 372, 405, 406, 408, 421, 422, 423, 505, 506, 507
R510 vehicles3 of them: some versions only	04/1972 – 06/1986	689 710, 698, 800 710, 810 19, 810 25, 810 26, 810 29, 840, 840 25, 840 26	3004 / 303, 305, 306, 314, 354, 364, 369, 428

Volkswagen

6 model series · 14 vehicles

Volkswagen model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
K 70 (48)2 vehicles	08/1970 – 06/1973	DA, DB	0600 / 405, 406
Transporter T2 (21)4 vehicles	08/1968 – 07/1979	AD, AG, AP, AS, CA, CB, CJ, GD, GE	0600 / 001, 035, 036, 039, 040, 043, 050, 064, 386, 394, 395, 396, 397, 409, 411, 412, 413, 418, 441, 443, 444, 473, 474, 476
Transporter T2 (23)2 vehicles	08/1970 – 07/1979	AD, AS, CJ, GD, GE	0600 / 001, 036, 064, 396
Transporter T2 (24)4 vehicles	08/1971 – 04/1979	AG, AP, AS, CA, CJ, GD, GE	0600 / 386, 394, 395, 397, 441, 443, 444, 473, 474, 476
Transporter T2 (26)1 vehicle	08/1968 – 04/1979	AD, AG, AS	0600 / 035, 039, 040
Typ 4 Variant (46)1 vehicle	01/1972 – 07/1974	EA, W	0600 / 378