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Number 8 marks the part’s position in this exploded view (Volkswagen Tiguan 2.0 4Motion (2017-2024)).
Other diagrams in the gallery may use a different number for the same part.
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 assembly26
- 1Alternator 04E903015G
- 1Alternator 04E903015H
- 1Alternator 04E903015P
- 1Alternator 04E903015Q
- 1Alternator 04E903015R
- 1Alternator 04E903015S
- 1Alternator 04E903023
- 1Alternator 04E903023D
- 1Alternator 04E903024Q
- 4Ut Hexagon Nut Self-locking Hexagon Nut N90074404
- 5Part N90403002
- 5Part N90403004
- 7Part 059903193C
- 7Part 06F903193
- 7Part 03L903193B
- 7Part 06J903193
- 8Regulator 04E903803
- 8Regulator 04L903803B
- 8Regulator 06H903803G
- 8Regulator 04C903803B
- 8Regulator 06J903803A
- 9Ring 028903237E
- 14Part 037145291
- 14Part 06H145291A
- 15Part 04C903119
- 15Part 04E903219E
Vehicle fitment table6
Europe (5)
| Vehicle | Years | Pos. | PR |
|---|---|---|---|
| Tiguan 2.0 4Motion | 2017-2024 | 8 | |
| 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 | 8 | 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.
