Alternator Regulator078 903 803 D

Audi, 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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Volkswagen Classic Parts

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Checked 2026-10-12 12:13 UTC

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Aftermarket part numbers

Supplier articles whose catalogue lists 078 903 803 D. Check the supplier’s own restrictions before ordering.

VEMO: V10-77-1017

Models in the manufacturer’s catalogue

Volkswagen Classic Parts lists 078 903 803 D under these models, with the model years of its catalogue sections. It names no engine, so a model here is not proof of fitment: check the part against your vehicle before ordering.

Passat B5 GP 2001–2005: Passat 4 (3B) 1996–2005 Passat 4 Variant (3B)
Passat B5 syncro/4MOTION 1998–2000: Passat 4 (3B) 1996–2005 Passat 4 Variant (3B)

Vehicle fitment

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

103 vehicles in 27 model series, inferred

Aftermarket parts that list 078 903 803 D fit these vehicles according to their supplier catalogues. That does not prove 078 903 803 D itself fits every one: check the engine code, production dates and the supplier’s restrictions on the model series’ vehicle pages.

Audi

19 model series · 82 vehicles

Audi model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
A4 (8D) 1994–20043 vehicles	11/1994 – 12/2000	ADP, ADR, AEB, AHL, ANA, ANB, APT, APU, ARG, ARK, ARM, ATW, AVV, AWT	0588 / 591, 592, 593
A4 (8D) Avant1 vehicle	11/1994 – 10/2000	ADP, AHL, ANA, ARM	0588 / 618
A4 (8D) Avant quattro2 vehicles	02/1996 – 09/2001	ADR, AEB, ANB, APT, APU, ARG, ARK, ATW, AWT	0588 / 620, 622
A4 (8D) quattro1 vehicle	11/1994 – 10/2000	ADR, APT, ARG	0588 / 600
A4 (8E2) 2000–200912 vehicles1 of them: some versions only	12/2000 – 12/2005	ALT, ALZ, AMM, ASN, AVJ, AVK, AWA, AYM, BCZ, BDG, BDV, BEX, BFB, BFC, BKE, BRB	0588 / 745, 746, 748, 749, 753, 784, 786, 796, 804, 808, 822, 846
A4 (8E2) quattro5 vehicles	10/2000 – 12/2004	AKE, ASN, AVJ, AVK, BAU, BDH, BEX, BFB	0588 / 747, 750, 752, 810, 823
A4 (8E5) Avant 2001–200412 vehicles1 of them: some versions only	09/2001 – 12/2004	ALT, ALZ, AMM, ASN, AVJ, AWA, AYM, BCZ, BDG, BDV, BEX, BFB, BFC, BKE, BRB	0588 / 772, 773, 775, 776, 780, 785, 787, 797, 805, 809, 820, 845
A4 (8E5) Avant quattro5 vehicles	06/2001 – 12/2005	AKE, ASN, AVJ, BAU, BDH, BEX, BFB	0588 / 774, 777, 779, 811, 821
A4 (8EC) 2004–200810 vehicles1 of them: some versions only	11/2004 – 12/2008	ALT, ALZ, AUK, BCZ, BDG, BFB, BFC, BGB, BKE, BKH, BLB, BNA, BPG, BPP, BRB, BRE, BRF, BWE, BWT	0588 / 745, 748, 804, 808, 837, 838, 846, 861, 863, 869, AAG, ACY, ACZ, ADB, ADE, ADF, ADH, ADJ, ADL, ADM
A4 (8EC) quattro4 vehicles	08/2004 – 06/2008	ASB, AUK, BFB, BGB, BKH, BPG, BWE, BWT	0588 / 810, 864, 870, 878, ADA, ADC, ADG, ADI
A4 (8ED) Avant 2004–20089 vehicles1 of them: some versions only	11/2004 – 06/2008	ALT, ALZ, AUK, BCZ, BDG, BFB, BFC, BGB, BKE, BLB, BPG, BPP, BRB, BRE, BWE	0588 / 772, 775, 805, 809, 845, 862, 865, 871, AAD, ACI, ACJ, ACL, ACO, ACP, ACR, ACT, ACV
A4 (8ED) Avant quattro4 vehicles	08/2004 – 12/2008	ASB, AUK, BFB, BGB, BKH, BPG, BWE, BWT	0588 / 811, 866, 872, 877, ACK, ACM, ACQ, ACS
A4 (8H) Cabrio 2002–20095 vehicles1 of them: some versions only	04/2002 – 03/2009	ALT, AMM, ASN, AVK, BDV, BFB, BGN	0588 / 791, 792, 798, 812, 839, AEP, AEQ, AER, AEV, AEW
A4 (8H) Cabrio quattro2 vehicles	04/2002 – 12/2005	ASN, AVK, BFB, BGN	0588 / 833, 834, AES, AEX
A6 (4B) 1997–20122 vehicles	06/2001 – 07/2004	ALT, ASN	0588 / 755, 763
A6 (4B) Avant2 vehicles	06/2001 – 01/2005	ALT, ASN	0588 / 756, 765
A6 (4B) Avant quattro1 vehicle	06/2001 – 01/2005	ASN	0588 / 766
A6 (4B) quattro1 vehicle	06/2001 – 01/2005	ASN	0588 / 764
A6 (4F) Avant quattro1 vehicle	03/2005 – 05/2006	BBJ	0588 / 891, ABF

Volkswagen

8 model series · 21 vehicles

Volkswagen model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
LT II (2D)6 vehicles	05/1996 – 07/2006	AGX, AHD, ANJ, APA, AVR, BBE, BBF	0603 / 020, 024, 029, 030, 033, 036, 051, 052, 053, 054, 055, 056, 057, 058, 060, 061, 062, 063, 064, 065, 333, 351, 526, 527, 643, 644
Passat 4 (3B) 1996–20051 vehicle	11/2001 – 05/2005	ALT	0603 / 671
Passat 4 4motion (3B)1 vehicle	09/2001 – 09/2004	BDN, BDP	0603 / 650, 672
Passat 4 Variant 4motion (3B)1 vehicle	09/2001 – 09/2004	BDN, BDP	0603 / 651
Transporter T4 (70)2 vehicles	09/1990 – 04/1996	AAF, ACU, ACV, AEN, AUF, AYC	0600 / 201, 206, 259, 260, 292, 293, 834, 876, 885, 933 0603 / 003, 005, 012, 014, 302, 304, 310, 312, 320, 442, 661
Transporter T4 (7D)5 vehicles3 of them: some versions only	07/1995 – 06/2003	AAF, ACU, ACV, AEN, AET, AEU, AHY, AJT, APL, AUF, AVT, AXG, AYC, AYY	0600 / 201, 206, 259, 260, 291, 292, 293, 834, 876, 885, 933 0603 / 003, 005, 012, 014, 025, 028, 045, 046, 302, 304, 310, 312, 320, 326, 338, 340, 341, 434, 435, 442, 443, 458, 459, 460, 520, 521, 523, 582, 660, 661, 663
Transporter T4 syncro (70)2 vehicles	11/1992 – 06/2003	AAF, ACU, ACV, AEU, AXL	0600 / 238, 240, 918, 922, 935 0603 / 016, 018, 043, 044, 307, 315, 455, 456, 522, 662
Transporter T4 syncro (7D)3 vehicles	01/1996 – 09/2003	AAF, ACU, ACV, AET, AEU, APL, AVT, AXL	0600 / 238, 240, 918, 922, 935 0603 / 016, 018, 026, 027, 043, 044, 307, 315, 334, 336, 436, 444, 455, 456, 522, 524, 662, 664