Description

Volvo Penta 20412589 is a genuine OEM filler cap used in Volvo Penta engine applications. Volvo Penta’s own parts catalog identifies part 20412589 simply as “filler cap,” and current catalog references place it in engine-related assemblies, including D5A-B TA engine schematics.

Key Features

• Genuine Volvo Penta OEM part number 20412589.
• Official Volvo Penta description: filler cap.
• Catalog references associate it with D5A-B TA / Engine usage.
• Current parts listings also show it as an OEM Volvo Penta replacement cap rather than a universal cap.

Engine Compatibility
Current catalog references connect Volvo Penta 20412589 to D5A-B TA engine diagrams, and additional OEM parts listings place it in Volvo Penta engine-related applications. Fitment should be treated as engine- and assembly-specific, not assumed across all Volvo Penta models. Always match to the exact parts diagram for the serial-numbered engine.

Serial Number Fitment Notice
Always confirm 20412589 against the exact engine serial number before ordering. Volvo Penta parts can vary by engine family, production break, and assembly version, so serial-number lookup is the safest way to confirm the correct filler cap.

When This Part Needs Replacement
Replace this filler cap when the original cap is cracked, loose, damaged, leaking, hard to secure properly, or no longer seals the opening as intended. It is also a smart replacement when the surrounding system is being serviced and the original cap shows age or wear.

Installation Notes
Install only in the correct matched Volvo Penta application. Inspect the filler neck or mating surface for wear, contamination, or damage before fitting the new cap, and follow the correct Volvo Penta service information for the exact engine and assembly. Volvo Penta’s support portal provides model-specific manuals and service information.

Alternate/Superseded Part Numbers
Current sources reviewed list this part under active Volvo Penta number 20412589. No confirmed superseded number was established in the sources reviewed here.

Parts Desk Insight
A filler cap may look simple, but it still needs to match the correct Volvo Penta assembly. Using the correct OEM cap helps maintain the intended seal, fit, and service reliability, especially on engine systems where the cap design is specific to the housing or neck it fits.

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