2009-2012 Porsche Boxster/Cayman Piston w/ Connecting Rod 9A110302903
Porsche Part #: 9A1-103-029-03 (9A110302903)
Actual photo
The exact part you’ll receive — not a stock photo.
$121.99
Used
Donor2010 Porsche BOXSTER · 2.9L · 43k miles
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Genuine OEM Used
SKU: 476495
Donor Vehicle: 2010 Porsche BOXSTER · 2.9L · 43k miles
2 photos
$121.99
30-Day Returns
Genuine OEM Used
SKU: 476497
Donor Vehicle: 2010 Porsche BOXSTER · 2.9L · 43k miles
2 photos
$121.99
30-Day Returns
Genuine OEM Used
SKU: 476494
Donor Vehicle: 2010 Porsche BOXSTER · 2.9L · 43k miles
2 photos
$121.99
30-Day Returns
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
A used OEM Porsche piston with connecting rod, part number 9A110302903, comes from a donor vehicle. This assembly serves the 2.9L 2893CC H6 naturally aspirated DOHC engine found in the Boxster and Cayman. The piston and rod convert combustion pressure into rotational force; common failure signs include cylinder misfire, low compression, or a knocking sound from worn wrist pins or rod bearings.
Specifications
| Fits Vehicle Model | Boxster, Cayman |
| Fits Vehicle Make | Porsche |
| Porsche Part No | 9A1-103-029-03 (9A110302903) |
| Category | Rotating Assembly |
Compatible Vehicles
Fits 8 vehicle configurations across 1 make, 2009-2012.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 8 vehicle configurations
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2009 | Porsche | Boxster | Convertible | 2.9L | |
| 2009 | Porsche | Cayman | Hatchback | 2.9L | |
| 2010 | Porsche | Boxster | Convertible | 2.9L | |
| 2010 | Porsche | Cayman | Hatchback | 2.9L | |
| 2011 | Porsche | Boxster | Convertible | 2.9L | |
| 2012 | Porsche | Boxster | Convertible | 2.9L | |
| 2012 | Porsche | Cayman | Hatchback | 2.9L | |
| 2011 | Porsche | Cayman | Hatchback | 2.9L |