FOCUSFILTER 2277129 Fuel-Water Separator Filter, 6-Pack

FOCUSFILTER 2277129 is a replacement cartridge-style fuel-water separator filter sold in a six-pack. The listing identifies heavy-duty applications and names Paccar MX11 and MX13 engines among its fitment claims, so confirm the exact part number and vehicle fit before ordering.

At a glance

Listed as a replacement part, not an original part.
The listing claims compatibility with Paccar MX11 and MX13 engine applications and identifies several Peterbilt truck fitments.
The title specifies a six-pack. The details list one filter-water separator and one O-ring as included components.

Price

$127.99Save 20%

Reference price: ~~$159.99~~

Price checked: Nov 14, 2026

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Often bought together

2234788 Oil Filter Replace 2047411 2151728 HU12009Z LF16368 P957929 | Compatible with DAF XF/CF MX-13315/13355/13390 12.9L MX-13340/13375 12.9L 6cyl EURO6 Truck Diesel SPARE XF106 480PC(3 PCS)

$47.99

Pros and cons

Pros

Six filters per titled pack can suit buyers stocking replacement elements for recurring maintenance.
The listing supplies a diameter and cartridge style to compare against the vehicle's specified replacement part.

Technical specifications

10 specifications

Identity
Brand	FOCUSFILTER
Product grade	Replacement Part
Manufacturer part number	LEFL36
OEM equivalent part number	2277129

Design and fit
Vehicle service type	Heavy Duty
Automotive fit type	Vehicle Specific Fit
Style	Cartridge
Item diameter	3.94 inches

Pack and support
Number of items	6
Manufacturer warranty	1 Year Manufacturer Warranty

What to know before buying

Fitment claims name T660 with Paccar MX-13, T880 with Paccar MX11, and Peterbilt 365 and 389 with Paccar MX Series engines. Confirm the exact vehicle, engine and replacement number before purchase. The listing also gives multiple cross-reference numbers, so verify the one required for your application.

What’s in the box

1 fuel filter water separatorCheck selected pack
1 O-ringIncluded

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Heavy-duty vehicle owners or maintenance teams seeking a cartridge-style replacement associated with part number 2277129.
Buyers who want a six-pack and have confirmed the filter's fitment for their vehicle.

Less suited to

Buyers seeking a confirmed original-equipment part, as the listing describes this as a FOCUSFILTER replacement.
Buyers who have not verified fitment against their vehicle and engine.

FOCUSFILTER 2277129 Fuel-Water Separator Filter, 6-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 1 ratings

5 stars100%100%
4 stars0%0%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied rating evidence is a single five-star rating. That small sample does not establish a broader customer consensus or explain the rating. Buyers should give more weight to confirmed fitment and the listed replacement-part status for this vehicle-specific filter.

Frequently asked questions

Is this an original equipment filter?

No. The listing states that it is a FOCUSFILTER replacement part, not an original part.

Which vehicles does the listing name?

It names T660 with a Paccar MX-13, T880 with a Paccar MX11, and Peterbilt 365 and 389 trucks with Paccar MX Series engines. Confirm the specific fit for your vehicle.

What comes in the package?

The product details list one fuel filter water separator and one O-ring. The title describes a six-pack, so check the selected listing's package details to confirm the quantity of each component.