Warranty

Kenworth Warranty Determination & Over‑the‑Counter Parts Policy

Understanding how Kenworth warranty claims are evaluated helps set clear expectations for coverage, eligibility, and reimbursement. The information below explains how warranty is determined and how over‑the‑counter parts are handled under warranty claims.

This page applies only to warranty claims and does not represent general service, goodwill, or non‑warranty repairs.

How Is Warranty Determined?

What determines whether a warranty claim is approved?

Warranty determination is made by the OEM or supplier (Kenworth) and is based on the following factors:

In‑service date
Mileage
Engine hours

All three criteria are reviewed when determining warranty eligibility. Coverage is not determined by repair location or purchase date alone.

Over‑the‑Counter Parts Warranty Policy

What is the warranty policy regarding over‑the‑counter parts?

For over‑the‑counter (OTC) replacement parts, the following policy applies:

Replacement parts must be paid for by the customer at the time of purchase
The Warranty Department will file a warranty claim
If the claim is approved and paid, the customer will receive reimbursement
Reimbursement is issued using the same method of payment as the original transaction

Warranty approval is subject to OEM review and claim acceptance.

Questions About a Warranty Claim?

If you have questions about towing coverage related to a warranty claim, contact Sioux City Kenworth for clarification before arranging towing or repairs.

Email warranty@nattinc.com

Towing Coverage for Truck‑Side Warranty Failures

What is the towing coverage policy for truck‑side failures?

If the damage is catastrophic and the failure is warrantable, the truck will be towed to the nearest certified Kenworth dealer.

Warranty towing conditions:

Truck tow only
No split tows
Failure must be warrantable
Coverage is limited to 6 months or 100,000 miles, whichever occurs first

Towing coverage applies only when the failed truck‑side component qualifies under warranty.

Towing Coverage for Engine‑Side Warranty Failures

What is the towing coverage policy for engine‑side failures?*

If engine‑side damage is catastrophic and the failure is warrantable, the truck will be towed to the nearest certified Kenworth dealer.

Warranty towing conditions:

Truck tow only
No split tows
Failure must be warrantable

* Disclaimer:
Used truck warranties often vary and are subject to the terms of each case’s scenario and policy carrier

Engine Warranty Coverage Timeframes

Towing coverage for engine‑side warranty claims depends on the engine manufacturer and applicable warranty terms.

PACCAR MX Engines

2 years or 250,000 miles

Cummins Engines

Coverage varies - Contact us (712) 258-2444

Always refer to the applicable engine warranty documentation for exact eligibility.

Warranty Form

Submit a warranty claim request using our online warranty form.

Warranty Form

Non Warrantable Items Download PDF

Quick Reference Guide Download PDF

Extended Warranty Download PDF

PACCAR MX Engine Warranty Download PDF

Warranty Write Up Sheet Download PDF

Part

Truck (DSFW)

Account #

Full Mailing Address

Phone Number

Contact

Reminder: New truck Warranty work performed by the customer or non-certified shop generally will be denied. Please check with Warranty Department before promising any and all warranty claim payments.

Year

Make

Engine Serial #

Part # of Failed

Vendor

Invoice/RO of Original Purchase

Date

Invoice/RO of Replacement Purchase

Date

Core Charge Paid
Yes No

Amount

Invoice

customer must sign & date copy of original invoice if replacement is purchased elsewhere.

Customer will be billed for replacement parts and credit will be issued when claim is paid. If no defect is found, claim will be denied and part may be returned to customer.

Parts Turned In By

Received By Warranty Dept

Received Date

Please Note: Non-Warrantable Item Include: Belts, Brake Drums (if any indiciation of heat cracking), Bug Screens, Clutch Facing, Coolers, Fasteners, Filter Elements, Fire Extinguishers, Fluids & Lubricants, Fuses, Glass, Jacks, Lamp Bulbs, Mattresses, Paint, Rubber Products, Seals, Gaskets, O-Rings, Stereo/Radio Equipment Tire Chains, Tools, Tow Pins, Upholstery Visually Observed Defects (prior to sale), Wheels (except Alcoa), Winter Fronts, Bug Deflectors. This list is not all inclusive.

You have solicited a repair order from the Seller, (North American Truck & Trailer, Inc., one or more of its subsidiaries, partners, or affiliates). All Repair Orders are subject to the following terms, limitations, and conditions, which you agree to follow.

No Warranties of any kind from Seller. ANY WARRANTIES ON THE PRODUCTS SOLD HEREBY ARE THOSE MADE BY THE MANUFACTURER, IF ANY. THE SELLER HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES EITHER EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND THE SELLER NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY LIABILITY IN CONNECTION WITH THE SALE OF SAID PRODUCTS AND SERVICES.

Goods produced with Fair Labor. WE HEREBY CERTIFY THAT THESE GOODS WERE PRODUCED IN COMPLIANCE WITH ALL APPLICABLE REQUIREMENTS OF SECTIONS 6, 7, AND 12 OF THE FAIR LABOR STANDARDS ACT OF 1938, AS AMENDED, AND OF ALL REGULATIONS AND ORDERS OF THE ADMINISTRATOR OF WAGE AND HOUR DIVISION ISSUED UNDER SECTION 14 THEREOF.

Disputes venued in Circuit Court in Sioux Falls, South Dakota, and governed by South Dakota Law. THE CUSTOMER AND SELLER AGREE THAT ANY DISPUTE ARISING HEREUNDER SHALL BE VENUED IN THE COUNTY OF MINNEHAHA, STATE OF SOUTH DAKOTA, CIRCUIT COURT FOR THE SECOND JUDICIAL CIRCUIT, AND THAT THIS DOCUMENT MAY BE PLED AS A BAR TO ANY SUIT OR PROCEEDING BROUGHT IN ANOTHER JURISDICTION OR ANY OTHER COURT OR TRIBUNAL. IN ADDITION, SOUTH DAKOTA LAW WILL GOVERN ALL DISPUTES ARISING UNDER THIS SALE.

Seller not responsible for personal property. THE CUSTOMER AND THE CUSTOMER'S REPRESENTATIVE(S) HEREBY AGREE TO HOLD THE SELLER HARMLESS AND NOT BE LIABLE FOR ANY MISSING OR DAMAGED PERSONAL PROPERTY LEFT IN THE VEHICLE WHILE THE VEHICLE IS IN THE SELLER'S POSSESSION, FOR ANY REASON.

Late accounts incur finance charge. A FINANCE CHARGE OF ONE AND ONE-HALF PERCENT (1 1/2%) PER MONTH IS APPLIED TO ALL ACCOUNTS 30 DAYS PAST DUE. THIS EQUALS AN ANNUAL PERCENTAGE RATE OF EIGHTEEN PERCENT (18%).

Customer pay collection costs. SIGNATURE BY THE CUSTOMER OR THE CUSTOMER REPRESENTATIVE OR ISSUANCE OF THE CUSTOMER'S PURCHASE ORDER AUTHORIZING THESE REPAIRS CONSTITUTES AGREEMENT TO PAY REASONABLE COLLECTION EXPENSES, INCLUDING ATTORNEY FEES AND COURT COSTS INCURRED BY THE SELLER FOR PAYMENT OF THIS INVOICE.

90-day / 3,000-mile limited guarantee. ALL NEW PARTS AND SERVICE WORK IS GUARANTEED 90 DAYS OR 3,000 MILES, WHICHEVER OCCURS FIRST, UNLESS THE FAILURE WAS CAUSED BY MISUSE, ABUSE, IMPROPER MAINTENANCE, OR DAMAGE. THE SELLER WILL REPAIR OR REPLACE AT SELLER'S OPTION ANY DEFECTIVE PARTS OR LABOR. THIS LIMITED GUARANTEE DOES NOT COVER DAMAGE DUE TO ACCIDENT, NEGLECT, ALTERATIONS, OVERHEATING, LACK OF LUBRICATION, OR LACK OF MAINTENANCE.

Seller will not pay for consequential damages. THE CUSTOMER AGREES THAT THE SELLER IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, DAMAGES TO DOWNTIME OR LOST REVENUE OR ANY OTHER INCIDENTAL DAMAGES.

Storage Charges. STORAGE CHARGES ACCRUE AT THE RATE OF $35.00 PER DAY AFTER FIFTEEN DAYS FROM THE DATE THE WORK IS COMPLETED.

Customer approves of all repairs listed. THE CUSTOMER OR THE CUSTOMER REPRESENTATIVE, EITHER IN WRITING OR ORALLY, HAS APPROVED OF ALL THE REPAIRS LISTED ON THIS INVOICE.

Failed parts policy. THE CUSTOMER HAS THE RIGHT TO INSPECT AND TAKE ALL FAILED PARTS WITH THEM, EXCEPT FOR CORES AND WARRANTY PARTS, AT THE TIME THE WORK IS DONE. ONCE THE WORK IS COMPLETED, SAID PARTS WILL BE DISPOSED OF PROPERLY.

WARRANTY CLAIMS/GOODWILL. CUSTOMER AGREES TO PAY/REIMBURSE THE SELLER FOR ALL UNPAID AND DENIED WARRANTY CLAIMS/GOODWILL AS AUTHORIZED BY THIS AGREEMENT.

Signature

Signature Date

Email Address

Phone Number

Warranty Claims & Coverage Information

Warranty Form