Martyr Volvo Penta SX Transom Plate Anode – Zinc | Saltwater (CM3855411Z)
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Martyr Volvo Penta SX Transom Plate Anode – Zinc | Saltwater (CM3855411Z)
The Martyr CM3855411Z is a zinc sacrificial anode designed as a direct OEM-equivalent replacement for the transom plate anode on Volvo Penta SX stern drives used in saltwater environments. It replaces Volvo Penta OEM part 3855411 and provides reliable galvanic corrosion protection at the transom plate position on the drive.
Zinc is the standard anode material for saltwater use, providing reliable galvanic protection in the higher conductivity of marine water. Martyr Anodes are manufactured to OEM-equivalent specifications, making this a trusted replacement for the factory anode.
Key Features
- Zinc construction — correct material for saltwater use
- Direct replacement for Volvo Penta OEM part 3855411
- OEM-quality Martyr Anodes construction
- Protects the transom plate position on the Volvo Penta SX drive
Compatible Applications
- Volvo Penta SX stern drives — transom plate anode position, saltwater use
- Replaces Volvo Penta OEM part number 3855411
Parts Desk Insights
This is a single zinc transom plate anode — the right choice when only the transom plate position needs replacement and the other SX drive anodes are still serviceable. The transom plate anode mounts on the transom shield of the SX drive and works alongside the gimbal plate anode to provide comprehensive corrosion protection at the drive’s transom interface. Zinc is the standard choice for saltwater use; if you prefer aluminum for its superior electrochemical activity in saltwater or brackish water, see the aluminum version: Martyr CM3855411A Volvo Penta SX Transom Plate Anode, Aluminum. For the alternate zinc listing of this anode, see the Volvo Penta SX Transom Plate Zinc Anode CMT-3855411Z. For the SX gimbal plate anode, see the Martyr CM3854130A Volvo Penta SX Gimbal Plate Anode, Aluminum and Zinc. For complete Volvo Penta SX anode kits that include both the transom plate and gimbal plate anodes, see the Martyr Aluminum Anode Kit – Volvo Penta SX Engine and the Martyr Aluminum Anode Kit – Volvo Penta SX Drive.
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
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
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.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.