Air Filter – Fits Volvo Penta AD31, AD41, TMD31, TMD41 Engines (Replaces 21646645, 3582358)

Air Filter – Fits Volvo Penta AD31, AD41, TMD31, TMD41 Engines (Replaces 21646645, 3582358)

This aftermarket marine engine air filter is designed to fit a range of Volvo Penta diesel engines in the 30-40 series, including the AD31, AQAD31, TAMD31, TMD31, AD41, AQAD41, TAMD41, and TMD41 models.

It serves as a direct replacement for Volvo Penta part numbers 21646645 and 3582358, as well as Sierra part number 18-7908.

• Fuel Type: Compatible with Diesel engines.
• Installation: Designed for direct replacement of the original filter element.
• Included Part: Includes one air filter element.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Air Filter Element (21646645/3582358)

Explosion Diagram

Installation Guide

1. Locate the engine's air filter housing.
2. Remove the housing cover, which is typically held in place by clips or wing nuts.
3. Carefully take out the old air filter element, noting its orientation.
4. Wipe the inside of the housing clean of any dust or debris.
5. Insert the new JLM Marine air filter, ensuring it is seated correctly and securely.
6. Replace the housing cover and fasten it.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my Volvo Penta engine?

A: Review the "Compatible Engine Models" list to ensure your specific model is included. This part is a direct replacement for OEM parts 21646645 and 3582358. Comparing the dimensions and images to your old part is also a reliable way to confirm fitment.

Q: What are the signs that my air filter needs replacing?

A: Common signs of a clogged or failing air filter include a noticeable decrease in engine power, increased black smoke from the exhaust, or higher-than-normal fuel consumption. A visual inspection showing a dirty or damaged filter also indicates it is time for a replacement.

Q: How often should I replace my engine's air filter?

A: Replacement frequency depends heavily on your operating environment (e.g., saltwater vs. freshwater, dusty conditions). We recommend a visual inspection every 50-100 hours of operation and replacing it at least once per season or whenever it appears dirty.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.