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Number 21 marks the part’s position in the exploded view.
Product overview
Genuine OEM Volkswagen Dodecagonal Head Bolt, part number 03D103109C. This bolt is a specialized fastener used in engine construction, identified by its dodecagonal (12-point) head. It is marked as number 21 in the engine component diagram. Proper torque and fit are essential for the integrity and performance of the engine. Genuine OEM bolts are manufactured to precise specifications, ensuring the correct material strength and thread engagement for reliable and long-lasting engine operation.
Catalogue entry: BOLT M10X241.
Technical details
- Category
- Engine
- Customs (HS) code
- 73181595
- Manufacturer
- Volkswagen
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 25.1 × 2.3 × 2.3 cm
- Shipping weight
- 0.14 kg
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
- Thread
- M10x241 mm
Equipment codes
- DG3
- D21
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
18 vehiclesDodecagonal Head Bolt — locate 03D103109C Volkswagen Dodecagonal Head Bolt | Genuine OEM in the official exploded view and explore the surrounding assembly.
Parts in this assembly14
Vehicle fitment table18
Europe (16)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| Toledo Reference | 2012-2015 | 21 | 1 | |
| Polo | 2012-2014 | 21 | 1 | D21 |
| Ibiza Reference | 2012-2012 | 21 | 1 | DG3 |
| Ibiza Reference | 2011-2012 | 21 | 1 | DG3 |
| Polo | 2009-2014 | 21 | 1 | D25 |
| Fabia Ambiente | 2009-2013 | 21 | 1 | D25 |
| Polo | 2009-2012 | 21 | 1 | D21 |
| Ibiza Reference | 2008-2011 | 21 | 1 | DG3 |
| Polo | 2008-2009 | 21 | 1 | MM4 |
| FOX M.05> | 2005- | 21 | 1 | |
| POLO | 2005- | 21 | 1 | |
| IBIZA 06> | 2005- | 21 | 1 | MA5 |
| CORDOBA 06> | 2005- | 21 | 1 | MA5 |
| CORDOBA/SE241 | 2002-2005 | 21 | 1 | MA5 |
| POLO | 2001-2005 | 21 | 1 | MM2 |
| IBIZA | 2001-2005 | 21 | 1 | MA5 |
Other markets (2)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| Ameo 1,0 | 2016-2020 | 21 | 1 | |
| Polo | 2014-2022 | 21 | 1 |
Diagrams & fitment data powered by oemdiagrams.com
03D103109C Volkswagen Dodecagonal Head Bolt | Genuine OEM is fitted on: Toledo Reference 2012-2015; Polo 2012-2014; Ibiza Reference 2012-2012; Ibiza Reference 2011-2012; Polo 2009-2014; Fabia Ambiente 2009-2013; Polo 2009-2012; Ibiza Reference 2008-2011; Polo 2008-2009; FOX M.05> 2005-; POLO 2005-; IBIZA 06> 2005-; CORDOBA 06> 2005-; CORDOBA/SE241 2002-2005; POLO 2001-2005; IBIZA 2001-2005; Ameo 1,0 2016-2020; Polo 2014-2022.