3261643 Caterpillar Fuel Filter propelparts

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3261643 Fuel Water for CAT 12M 3, 12M 3 AWD, 140M 2 & more

Name: 3261643 Fuel Water for CAT 12M 3, 12M 3 AWD, 140M 2 & more
Brand: Aftermarket CAT
SKU: 3261643CTP
Price: 37.365 USD
Availability: InStock
Rating: 4.7 (126 reviews)

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New 1R0771 (3261643) Fuel Water Separator Filter Replacement suitable for Caterpillar Equipment
Made to USA Specification

Buy with Confidence: All parts are covered by our warranty

$37.37

In Stock • Ships Today • Order By 3pm ET

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SKU

3261643CTP

Details

Description for 3261643 Fuel Filter

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This aftermarket Caterpillar 3261643 Fuel Filter is built to meet U.S. OEM specifications for durability and performance. At Propel Parts, we perform strict quality checks to ensure it fits and functions like your original Caterpillar Fuel Filter.

Direct Replacement: Engineered for a precise fit in Caterpillar equipment.

OEM-Spec Quality: Manufactured to match the performance of your original part.

Tested Reliability: Strict quality checks are performed before shipping.

Specification for 3261643 Fuel Filter

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Replacement Part Number(s): 326-1643

Specifications: Aftermarket Part | US OEM Specs.

Shipping: Same Day (Weekdays) | Order by 3pm.

Warranty: Unlimited Mileage | 1 Year Warranty.

Core: No Core Required | No Core Charge.

Weight: 2.40 LBS | 1.09 KG

Dimensions: 4.72 x 4.72 x 10.24 (inches)

Condition: New

Exact Fit Guarantee for 3261643 Fuel Filter

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Looking for a reliable replacement Caterpillar 3261643 Fuel Filter ? Order with confidence through our Exact Fit Guarantee.

Verified Fit: Before we ship, we check your part against CAT SIS (Caterpillar Service Information System) to confirm it's the correct match for your machine.

Peace of Mind: If it isn't the right fit, we'll contact you with the correct Caterpillar part number before your order goes out.

Exclusive Guarantee: Enroll in our Exact Fit Guarantee at checkout to ensure you get the part you need the first time.

More Information

More Information
Models	12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 2864C, 320D, 320D FM, 320D GC, 323D L, 336E, 336E H, 336E HVG, 336E L, 336E LH, 336E LN, 336F L, 345D
Dimensions	4.72x4.72x10.24

Reviews

Customer Reviews

NE Enterprises (India) 03/02/2026

100%

They went above and beyond to make sure my order was right. Thanks again
Walter Aguirre-Spika (Florida, USA) 10/06/2025

80%

Everything fine, thank you. The only thing with which I had a problem in your Software, is that when I have more than 10 different items on the list, I can't scroll to the first ones. But besides that, I am very happy in going on with buying your parts.
Nathan Peterson (California, USA) 04/24/2025

100%

rapid response!
Long Le (Vietnam) 12/17/2024

100%

Great customer services, the best
Stan Pfeiler (Iowa, USA) 11/17/2022

100%

Great service They respond back very fast always try…
They respond back very fast always try there best to get what I need
Very friendly
Prices are reasonable
If there is a problem they fix it
Been working with them 4 years and hopefully many more

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Product Questions

Frequently Asked Questions

Product

What is the function of the 3261643 Fuel Water Separator Filter?

The 3261643 Fuel Water Separator Filter removes water, dirt, and other contaminants from the fuel system. This helps maintain fuel purity, protects injectors, and ensures smoother engine performance.

How to install this 3261643 fuel water separator filter?

Please follow the instructions below to install
1. Begin by shutting off the engine and allowing it to cool
2. Locate the existing fuel filter and carefully remove it to prevent spillage
3. Clean the mounting area
4. Apply a small amount of clean fuel to the new filter’s gasket, and hand-tighten it into place. After installation, prime the system if required and check for any leaks once the engine is restarted.
Always refer to your equipment’s service manual for precise instructions.

Which equipment models are compatible with this 3261643 filter?

This filter fits several models such as 12M 2, 140M 3, 160M 2, 2864C, 320D, 336E, 336F L, and more. Checking your part number or equipment model before purchase ensures proper compatibility. If you are unsure don’t hesitate to reach out to Propel Parts for help verifying fitment.

When should the fuel water separator be replaced?

It’s best to replace this filter during scheduled maintenance or when you notice water accumulation, reduced engine power, or inconsistent fuel delivery. Regular replacement helps prevent fuel system damage.

Does this 3261643 filter meet equipment performance standards?

Yes, this filter is designed to OEM specifications, offering reliable separation efficiency and long-lasting performance even under demanding conditions.

What are the signs that this 3261643 filter needs replacement?

If you notice any of the following: Rough idling Slow acceleration Visible water in the fuel bowl It’s a clear sign the filter may need replacement.

Can I install this 3261643 fuel water separator myself?

Yes, it can be installed with standard tools and basic mechanical knowledge. However, professional assistance is recommended if you’re unfamiliar with fuel system maintenance.

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Compatible Models

This 3261643 Fuel Filter is compatible with the following models:
12M 2, 12M 3, 12M 3 AWD, 140M 2, 140M 3, 140M 3 AWD, 160M 2, 160M 3, 160M 3 AWD, 2864C, 320D, 320D FM, 320D GC, 323D L, 336E, 336E H, 336E HVG, 336E L, 336E LH, 336E LN, 336F L, 345D & more...

Shipping | Returns

Shipping

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.

We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.

Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Easy Returns

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Warranty

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.

Exact Fit Guarantee