NHTSA ID Number: 11034281
Manufacturer Communication Number: CE033
TSB/Document Date: 2026-07-02
Summary
"KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy."
6/24/26, 1:21 PM
Aftersales Service - Emission Service Bulletin
CE033: MX Component-Specific Emissions Warranty for
EMY2023 PACCAR
MX-11 and MX-13 Engines
6/24/2026
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MX Component-Specific Emissions Warranty for EMY2023 PACCAR MX-11 and MX-13 Engines
Whats New Abstract
6/24/2026-14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to
this warranty policy.
Introduction
U.S. and Canadian Federal emissions regulations require that the warranty coverage is a period of ten (10)
years or 435,000 miles/700,000 km/22,000 engine hours, whichever comes first, from the original warranty
registration date for these specific components on the EMY2023 PACCAR MX-11 and MX-13 engines. PACCAR
has implemented the extension, and it is effective retroactively unless the part is listed as ineligible for
reimbursement below.
Revision
6/24/2026-14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to
this warranty policy.
07/02/2025 – 32 fuel injector part numbers (16 for MX-11 and 16 for MX-13) have been added to this warranty
policy. .
Condition
Units that have coverage under this warranty will be identified in Service Information Record (SIR):
Sales Code
Coverage Description
9202164
EW: MX Emissions 10yr/435K Miles (700K km) – Engine MY2023
Submit a long-form warranty claim through PRWS, using the applicable claim type shown in the chart below,
for any repair that meets the requirements of this bulletin. If the repair falls under campaign E290, file a claim
using appropriate quick claim code from campaign E290. Please ensure the correct VIN number is selected
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Aftersales Service - Emission Service Bulletin
and that all claim filing requirements are met.
Use the following coding when submitting your warranty claim:
PPD Part Number
Part Description
Claim Type
Failure Location
2314736 (PEX)
INJECTOR, MX-11, EPA21
Engine
044-004-001
2314737 (PEX)
INJECTOR, MX-13, EPA21
Engine
044-004-001
2383578 (PEX)
INJECTOR, MX-11, EPA21
Engine
044-004-001
2383579 (PEX)
INJECTOR, MX-13, EPA21
Engine
044-004-001
2394547 (PEX)
INJECTOR, MX-11, EPA21
Engine
044-004-001
2394548 (PEX)
INJECTOR, MX-13, EPA21
Engine
044-004-001
2403200 (PEX)
Engine
044-004-001
2403201 (PEX)
Engine
044-004-001
2403775 (PEX)
INJECTOR, MX-11, EPA21
Engine
044-004-001
2403776 (PEX)
INJECTOR, MX-13, EPA21
Engine
044-004-001
2403777 (PEX)
INJECTOR, MX-11, EPA21
Engine
044-004-001
2403778 (PEX)
INJECTOR, MX-13, EPA21
Engine
044-004-001
2423651 (PEX)
Engine
044-004-001
2423652 (PEX)
Engine
044-004-001
2423653 (PEX)
Engine
044-004-001
2423654 (PEX)
Engine
044-004-001
2426853 (PEX)
INJECTOR, MX-11, EPA21/24
Engine
044-004-001
2426854 (PEX)
INJECTOR, MX-13, EPA21/24
Engine
044-004-001
2426855 (PEX)
INJECTOR, MX-11, EPA21/24
Engine
044-004-001
2426856 (PEX)
INJECTOR, MX-13, EPA21/24
Engine
044-004-001
2428773 (PEX)
Engine
044-004-001
2428774 (PEX)
INJECTOR, MX-13, CARB 24
Engine
044-004-001
2429854 (PEX)
Engine
044-004-001
2429855 (PEX)
Engine
044-004-001
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Aftersales Service - Emission Service Bulletin
2452061 (PEX)
Engine
044-004-001
2452062 (PEX)
Engine
044-004-001
2460409 (PEX)
Engine
044-004-001
2460410 (PEX)
Engine
044-004-001
2460411 (PEX)
Engine
044-004-001
2460412 (PEX)
Engine
044-004-001
2460413 (PEX)
Engine
044-004-001
2460414 (PEX)
Engine
044-004-001
2434417 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2434418 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2461235 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2461236 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2477784 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2477785 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2477786 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2477787 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2477862 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2477863 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2477864 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2477865 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
2491046 (PEX)
FUEL INJECTOR, MX-11, EPA21
Engine
044-004-001
2491047 (PEX)
FUEL INJECTOR, MX-13, EPA21
Engine
044-004-001
For retroactive payments, file a long form claim and populate parts and labor costs to the sublet fields. Make
sure to attach an invoice and receipt to the claim to document the repair and payment made
Warranty
The emissions warranty will cover the repair costs for any failure of an emissions-related part described in this
bulletin that results under normal use and service, caused by a warrantable failure, which must be the result of
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Aftersales Service - Emission Service Bulletin
a defect in material and/or factory workmanship. Reimbursement will include:
Parts
Labor
Consumables (when not reusable)
PROACTIVE REPAIRS ARE NOT COVERED BY THIS PROGRAM.
Towing will only be covered if 'engine' emission component failure occurs within the base engine period of 24
months/250,000 miles/6,250 hours, whichever comes first. Outside of base engine coverage, towing and travel
are excluded.
PACCAR will pay for reasonable labor costs for engine removal and reinstallation when necessary to repair a
warrantable failure.
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Aftersales Service - Emission Service Bulletin
The emissions warranty is retroactive and applies to qualifying warrantable failures that customers have
already had repaired at their expense.
These components qualify for coverage on EMY2023 PACCAR MX-11 and MX-13 Engine:
Engine Model Year
PPD Part Number
Part Description
2023 (MX-13)
2314737 (PEX)(1)
2383579 (PEX)(1)
2394548 (PEX)(1)
2403776 (PEX)(1)
2403201 (PEX)(1)
2403778 (PEX)(1)
2423652 (PEX)(1)
2423654 (PEX)(1)
2426854 (PEX)(1)
2426856 (PEX)(1)
2429855 (PEX)(1)
2428774 (PEX)(1)
2452062 (PEX)(1)
2460410 (PEX)(1)
2460412 (PEX)(1)
2460414 (PEX)(1)
2434417 (PEX)(2)
2461236 (PEX)(2)
2477785 (PEX)(2)
2477787 (PEX)(2)
2477863 (PEX)(2)
2477865 (PEX)(2)
2491047 (PEX)(2)
https://paccarnet.sharepoint.com/sitepages/emissvcbltin.aspx?ctx=eyJ3ZWJVcmwiOiJodHRwczovL3BhY2Nhcm5ldC5zaGFyZXBvaW50LmNvbS9zaX…
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2023 (MX-11)
Aftersales Service - Emission Service Bulletin
2314736 (PEX)(1)
2383578 (PEX)(1)
2394547 (PEX)(1)
2403775 (PEX)(1)
2403200 (PEX)(1)
2403777 (PEX)(1)
2423651 (PEX)(1)
2423653 (PEX)(1)
- 6X better wear protection on critical engine parts than...
- 1.3X better sludge protection than industry standards*
- 3X Stronger against viscosity breakdown than leading full...
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN...
- Formulated for engines with 75,000 miles or more, Valvoline...
- Delivers 20% better wear protection and 15% better sludge...
- Extra detergents safeguard against friction, corrosion and...
- Advanced friction-fighting additives help maximize...
- Provides performance benefits for high mileage, new and...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
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TSB/Document ID: CE033
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-25
MFR Internal Campaign ID/Software Version: CE033
Communication Type: Warranty Program/Extension
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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