United States
Product overview
Genuine OEM Volkswagen Voltage Regulator, part number 03L903803B. This component is part of the alternator assembly and is responsible for controlling the output voltage to maintain a stable electrical supply for the vehicle's systems. It is mounted within the alternator housing. Genuine OEM parts are calibrated to precise specifications to ensure optimal battery charging and prevent damage to electrical components.
Catalogue entry: REGULATOR; only to be used for: 04E 903 015 R; 04L 903 021 J.
Technical details
- Category
- Electrical & Wiring
- Country of origin
- Hungary
- Customs (HS) code
- 85118000
- Manufacturer
- Volkswagen
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 7 × 6.8 × 4.2 cm
- Shipping weight
- 0.1 kg
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
Equipment codes
- T3Y
- T6F
- TL1
- TL8
PR codes identify the factory option a part belongs to; your vehicle’s are listed on the data sticker in the boot well or service booklet.
Why buy from WW Spares?
- ✓ Genuine OEM inventory sourced directly from factory networks
- ✓ Fitment support from workshop-seasoned parts specialists
- ✓ Global logistics with customs-ready documentation
Need help confirming compatibility? Talk to a specialist
Parts diagram & fitment
6 vehiclesVoltage Regulator — locate 03L903803B Volkswagen Voltage Regulator | Genuine OEM in the official exploded view and explore the surrounding assembly.
Parts in this assembly32
- 1AlternatorLeft03C903023T
- 1AlternatorLeft03L903023
- 1AlternatorLeft03L903023B
- 1AlternatorLeft03L903023D
- 1AlternatorRight03L903024F
- 1AlternatorRight03L903024K
- 1Alternator 03C903023S
- 1AAlternatorLeft03C903023TX
- 1AAlternatorLeft03L903023X
- 1APartLeft03L903023AX
- 1APartLeft03L903023BX
- 1AAlternatorLeft03L903023DX
- 1AAlternatorRight03L903024FX
- 1APartRight03L903024KX
- 1APartRight03L903024MX
- 1AAlternator 03C903023SX
- 2Part 03C903119C
- 2Part 022903119C
- 3Ring 028903237E
- 4Repair Kit 028903320C
- 5Prot Cap 037145291
- 6Regulator 06E903803G
- 6Regulator 06E903803N
- 6Regulator 06H903803C
- 6Regulator 079903803
- 6Regulator 07K903803
- 7Part 06E903193A
- 7Part 06F903193A
- 7Part 059903193C
- 8Part N10744601
- 9Part N90403004
- 10Housing 4D0971992B
Compatible / alternative parts(5)
Vehicle fitment table6
Europe (5)
| Vehicle | Years | Pos. | PR |
|---|---|---|---|
| Tiguan 2.0 4Motion | 2017-2024 | 6 | |
| Passat CC | 2011-2016 | 7 | |
| Sharan Blue Motion | 2010-2015 | 6 | |
| Passat saloon | 2010-2015 | 6 | |
| Alhambra Stylance | 2010-2013 | 6 |
Other markets (1)
| Vehicle | Years | Pos. | PR |
|---|---|---|---|
| Taos 1.4 | 2021-2023 | 6 | 04 |
Diagrams & fitment data powered by oemdiagrams.com
03L903803B Volkswagen Voltage Regulator | Genuine OEM is fitted on: Tiguan 2.0 4Motion 2017-2024; Passat CC 2011-2016; Sharan Blue Motion 2010-2015; Passat saloon 2010-2015; Alhambra Stylance 2010-2013; Taos 1.4 2021-2023.
