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

$37.37
In Stock • Ships Today • Order By 3pm ET
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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.
Reviews

Customer Reviews

★★★★★

My part was damaged in shipping and everyone was very helpful on get it resolved and sent me another free of charge.

★★★★★

Online order.
I had a good experience this morning I placed an online order and everything went smoothly. The staff at propel parts has always been helpful in the past when I have been looking for harder to find parts or something that wasn’t listed online.

★★★★★

Very prompt services !

★★★★★

I’ve been ordering parts from propel for about 3 years & counting. I live in Hawaii where we have a hard time getting parts especially for decent prices with fast shipping. I've been 100% satisfied with the company and the customer service and will continue to use them. I recommend propel to everyone here in Hawaii and we are all happy to have you guys. Thank you!!!

★★★★★

The customer care response was very awesome. It was more than what I expected
The customer care response was very effective and timely
The response time was amazing
The availability of most of the parts that I wanted was also very awesome
Thanks keep it up

★★★★★

Our CSR for Dymax Inc., Deb, has been extremely helpful and consistently provides quick, accurate information regarding parts and inventory. When we encounter difficulties finalizing transactions through the internal website, she is able to promptly generate quotes and provide an external, secure method for payment. Her responsiveness and willingness to assist play a key role in supporting our team’s success.

★★★★★

To my country the company is doing great
The products they market is good and
Affordable.
They can delivery to any country, stree free.
Tested and trusted.

★★★★★

A Delay Handled the Right Way
Honestly, if I were in Miami like my shipment was, I wouldn?t have been in a hurry to ship out either. I was frustrated at first ? delays cost me time on the job ? but Propel Parts stepped up.

Deb, Daniel and the team owned the mistake, kept the communication clear, and graciously refunded my shipping costs without making it a hassle. That kind of accountability is rare these days, and I genuinely appreciated how they handled it.

Things don?t always go perfectly, but these folks proved they?re more interested in doing right by their customers than just pushing parts out the door. Solid company, solid people.

? Jimmy Spong
Hartco Mobile Welding

P.S. Incredible quality on the pin as well. I had to do some custom modifying, and let?s just say the case hardening was ? well ? hard. Great Stuff! Thank you.

★★★★☆

I would give 5 stars but my first time ordering from here and using aftermarket parts. The price is reasonable comparing to original Cat parts and the customer support is great and hoping to do more business with them

★★★★★

Propel parts is a good Cat vendor that provides a top notch service to customers from ordering to delivery. Their after sales service is really impressive.

Product Questions

Frequently Asked Questions

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.
Questions About this Part?
Have a question about fit, compatibility, shipping, warranty, or returns?
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

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