Volvo Penta Power Steering Cylinder 21910902 – SX / DPS Sterndrive
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Volvo Penta Power Steering Cylinder – Part No. 21910902
Part Number: 21910902
Brand: Volvo Penta
Supersedes: 3812269, 3862513, 3862210, 3860883, 3860726, 3850244, 3854878, 3856710, 3856716, 3858128
Replaced By: Current – 21910902 is the active OEM number
Overview
This is a genuine Volvo Penta OEM power steering cylinder (actuator/ram assembly) for SX and DPS sterndrive transom assemblies. It converts hydraulic steering pressure into mechanical movement at the sterndrive, providing precise and controlled steering input at the transom shield.
System
Hydraulic Power Steering – Sterndrive Transom Assembly
Compatible Applications
- Volvo Penta SX-M sterndrive
- Volvo Penta SX-A sterndrive
- Volvo Penta DPS sterndrive
- Volvo Penta DPS-A sterndrive
- Volvo Penta DPS-B sterndrive
- Selected Volvo Penta DP-SM applications
- Selected Volvo Penta D3 sterndrive installations
- Volvo Penta V6 and V8 gasoline sterndrive packages using a compatible SX/DPS transom assembly
Fitment Notice
Volvo Penta used several steering actuator and transom configurations across SX and DPS generations. Engine model alone is not sufficient to confirm fitment. Always verify the exact drive model, transom shield generation, and steering-system parts diagram before ordering.
Superseded Part Numbers
The following earlier Volvo Penta references have been consolidated into 21910902:
- 3812269
- 3862513
- 3862210
- 3860883
- 3860726
- 3850244
- 3854878
- 3856710
- 3856716
- 3858128
Use 21910902 as the current OEM ordering number.
When to Replace
This steering cylinder typically requires replacement when you notice hydraulic fluid leakage at the actuator, excessive play or looseness at the steering connection points, corrosion or scoring on the ram, inconsistent or heavy steering response, or abnormal movement in the sterndrive steering linkage.
Installation Notes
During replacement, inspect the hydraulic steering lines, fittings, O-rings, mounting points, and related steering hardware for wear or damage. After installation, bleed the hydraulic steering system following the applicable Volvo Penta service procedure and verify smooth, full-range steering movement with no leaks or binding before returning the vessel to service.
Parts Desk Insights
This steering cylinder is the most common replacement in the SX and DPS sterndrive family when hydraulic steering becomes sloppy or starts leaking at the transom. The most frequent ordering mistake is confusing this part with the DPH or DPR trim and steering cylinder — those are different assemblies. Matching the transom shield generation and drive model (not just the engine) is the key step to getting the right part the first time.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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