Kenworth Parts Lookup by VIN — Decode the Build Spec That Drives Correct OEM Parts Fitment.
A Kenworth parts lookup by VIN begins with the build spec encoded in the 17-character VIN — it's what determines which PACCAR MX filter, Meritor axle seal, or Eaton transmission component is correct for your truck. Every Kenworth T680, W900, T880, and medium-duty T380/T480 built since MY1981 carries that VIN; PACCAR Parts uses the decoded spec to pull the right part number. Decode it below for free and order with confidence.
Free Kenworth VIN Lookup — Decode Any Kenworth VIN for Parts
Enter the 17-character Kenworth VIN and surface the model series, engine family, GVWR class, cab configuration, and assembly plant — the spec your PACCAR Parts counter needs.
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Quick Answer
- How do I look up Kenworth parts by VIN?
- Decode the 17-character Kenworth VIN with CarCheckerVIN to identify the build spec — model series (T680, W900, T880, W990), engine family (PACCAR MX-13/MX-11 or Cummins X15), transmission type, GVWR class, axle configuration, and Chillicothe or Renton assembly plant. Bring that decoded spec to a PACCAR Parts dealer or authorized Kenworth service location to match OEM part numbers. CarCheckerVIN decodes the spec; the PACCAR Parts counter provides the actual part numbers.
- What does a Kenworth VIN tell a parts buyer?
- A Kenworth VIN (WMI 1XK or 1NK) encodes the model series, engine family, GVWR class, cab configuration, model year (position 10), and assembly plant — Chillicothe Ohio or Renton Washington (position 11). Because the engine is a PACCAR MX or Cummins unit recorded on the separate build spec and engine dataplate, parts buyers need both the decoded VIN and the PACCAR spec sheet to confirm fitment on drivetrain, aftertreatment, and emissions components.
- Where do I get official Kenworth OEM part numbers?
- PACCAR Parts — Kenworth's official parts network — is the source for genuine OEM part numbers. Supply the decoded VIN spec (engine family, model series, model year, axle configuration) plus the engine serial from the engine dataplate to your PACCAR Parts dealer or authorized Kenworth service center. CarCheckerVIN provides the decoded spec and recall status; the parts counter provides the actual OEM part numbers. Do not attempt to identify part numbers from the VIN string alone.
What a Kenworth VIN Tells a Parts Buyer
A Kenworth VIN encodes the build attributes that drive parts catalog lookups — but the 17 characters are not a full build record. Here is what a Kenworth parts lookup by VIN returns, where it is definitive, and where the PACCAR spec sheet must pick up the detail.
Engine family — PACCAR MX or Cummins
The VIN descriptor section encodes the engine family: PACCAR MX-13 (the most common linehaul engine), PACCAR MX-11 (lighter-spec line-haul), or Cummins X15 or X12 (fleet-specified alternatives). The engine serial, horsepower calibration, and emissions variant live on the engine dataplate and PACCAR spec sheet. For injector, turbocharger, or aftertreatment parts, the parts counter needs both the VIN-decoded engine family and the engine serial from the dataplate to guarantee fitment — neither alone is sufficient.
GVWR class and axle configuration
The descriptor section encodes the GVWR band separating medium-duty T380 or T480 units from Class 8 T680, W900, and T880 tractors. Axle configuration — 6x4 tandem, 4x2 single-drive, 6x2 liftable rear, or heavy-haul multi-axle setups on the T880 — governs which axle bearings, seals, and lubricants are correct. A mismatch on axle configuration means a part that physically looks right will fail prematurely in service.
Transmission type
Kenworth encodes the transmission family in the descriptor section: Eaton Fuller 13-speed or 18-speed manual, Eaton UltraShift PLUS AMT, or PACCAR TX-12 or TX-18 automated. Each has its own filter, fluid specification, and shift-system components. The wrong transmission model and the filter will not seal correctly — a detail that starts with a missed VIN decode.
Model series and cab configuration
T680 aero sleeper or day cab, W900 classic long-hood, W990 modern long-hood, T880 vocational, T800 heavy-haul, T680E battery-electric, T380 or T480 medium-duty, or K370 cabover — the VIN descriptor encodes the model and cab configuration. Cab model determines door glass, mirror assemblies, HVAC components, and interior panels. Cross-referencing cab model is essential because the W900 and T680 share PACCAR MX engines but use different body hardware.
Assembly plant and model year
Kenworth builds its Class 8 trucks in Chillicothe, Ohio, and Renton, Washington. Legacy units came from Ste-Thérèse, Quebec. Position 11 of the VIN identifies the plant; position 10 encodes the model year (1=2001 through 9=2009, A=2010 onward). Model year is critical for emissions tier: pre-EPA07, EPA07, EPA10, and GHG17 Kenworths carry different DPF, SCR, and DEF system configurations with non-interchangeable aftertreatment components.
Open recalls — check before you order
A Kenworth VIN lookup pulls the live NHTSA recall feed for that specific VIN. Open recall campaigns on brake lines, steering, fuel systems, or wiring harnesses mean those components are covered at no charge from a Kenworth service center. Checking recall status before placing a parts order prevents paying out of pocket for components that an active campaign would supply free.
Decoding a Kenworth VIN for Parts Ordering
Kenworth is a PACCAR Inc. brand — the same parent company as Peterbilt, sharing the PACCAR MX engine platform and TX automated transmission family. Kenworth Class 8 trucks use the WMI codes 1XK and 1NK for US production. The 17-character VIN follows the ISO 3779 global standard; here is what each position section means for a parts lookup.
The first three characters are the World Manufacturer Identifier (WMI). US-built Kenworth trucks carry 1XK — this covers the T680, W900, W990, T880, T800, and T380/T480 lines built in Chillicothe Ohio and Renton Washington. 1NK is also assigned to Kenworth. Legacy units from Ste-Thérèse, Quebec appear with different WMI prefixes on older trucks. A WMI mismatch on a claimed Kenworth is a red flag worth investigating before purchase or a major parts investment.
Characters four through eight are the vehicle descriptor — encoding model series, engine family, GVWR class, and cab type. Character nine is the check digit (calculated; the 17-character standard excludes I, O, and Q). Character ten is the model year code — the single most important field for emissions-tier parts fitment. Character eleven is the assembly plant (Chillicothe or Renton on current production). Characters twelve through seventeen are the unique production sequence.
For a parts order, present the decoded fields — model series, engine family, model year, GVWR class, axle configuration, and cab type — to the PACCAR Parts counter, along with the engine serial from the engine dataplate. The specialist cross-references those fields in the PACCAR catalog to return the correct part number. The decoded VIN gets you to the right shelf; the engine serial and build spec confirm the right bin.
Kenworth VIN identifiers
1XKUS-built Kenworth (primary WMI)1NKUS-built Kenworth (secondary WMI)Pos 10Model year — determines emissions tierPos 11Plant: Chillicothe OH or Renton WAPos 8Engine family + GVWR class encoded herePos 12–17Unique production serial
PACCAR MX-13 and MX-11 engines are built by PACCAR separately from the chassis in Columbus Mississippi. The engine serial on the dataplate — not the VIN string — is required to confirm fuel system and aftertreatment fitment at the parts counter.
Where to Find the VIN on a Kenworth for a Parts Lookup
Federal FMVSS regulations require the VIN in at least two locations on every commercial vehicle. On a Kenworth, the primary VIN is on the driver-door jamb FMVSS label — the placard that also lists the GVWR, front and rear GAWR, and tire inflation specs. This label is factory-installed and includes the build date, making it the most reliable source for any parts lookup.
The secondary VIN location on a Kenworth is the dashboard plate on the lower driver-side corner, visible through the windshield from outside the cab. A third VIN is typically frame-stamped on the left-side rail near the front axle and remains readable even if the cab is replaced or damaged. Commercial registration documents, the title, and the insurance certificate all list the VIN as well.
For a parts lookup, always use the full 17-character VIN from the door-jamb label. On a high-mileage Kenworth or a truck that has had cab repairs, compare the door-jamb VIN against the frame-rail stamp — a mismatch between the two indicates a cab swap, which can mean the truck's VIN history and its current parts configuration no longer match. A single transposed character in the VIN changes the decoded model year or engine family and sends the wrong part.
Kenworth VIN locations
- Driver-door jamb FMVSS label (primary — includes build date)
- Dashboard plate, lower driver-side, visible through windshield
- Left frame rail stamp near front axle
- Title and commercial registration documents
- Commercial insurance certificate
Compare the door-jamb VIN to the frame-rail stamp on repaired Kenworths. A cab swap can leave the truck with a VIN that no longer matches its drivetrain configuration — a critical mismatch for parts fitment.
Decode Your Kenworth VIN for Free
Get the PACCAR MX engine family, model series, emissions tier, and axle configuration your PACCAR Parts dealer needs — free, instant, no account required.
How Open Kenworth Recalls Affect Parts Orders
Recall status on a Kenworth VIN directly affects which parts the dealer covers at no charge. Checking recall status before ordering parts prevents paying out of pocket for components a live campaign would supply free. Three categories come up most often on used Class 8 Kenworths.
Brake system and air line recalls
NHTSA has issued Kenworth recall campaigns covering air-brake valves, automatic slack adjusters, and brake chamber assemblies across T680, W900, and T880 model years. If the VIN carries an open brake system recall, the replacement components are supplied and installed by an authorized Kenworth service center at no charge to the owner. Purchasing those air-system components yourself before checking recall status means paying for work the recall covers free.
Fuel and aftertreatment system campaigns
EPA10 and GHG17 Kenworths have carried fuel filter mounting, DEF dosing module, and DPF sensor recall campaigns. An open aftertreatment or fuel system recall means specific components are covered under the campaign. The VIN lookup shows which campaigns are open on that specific truck, so you know before you spend on aftermarket alternatives for a system the factory will repair at no charge.
Electrical harness and safety system recalls
Certain T680 and T880 model years carry wiring harness, body control module, and exterior lighting recall campaigns. Wiring harness completions are logged by VIN, so a VIN lookup tells you whether a prior fleet owner resolved the campaign — relevant when you are diagnosing an electrical fault and evaluating whether to order replacement wiring or push for a recall repair at the Kenworth service center.
Buying a used Kenworth or stocking parts for a fleet? Check the VIN with a focused recall check and a truck history report before spending on components that an open campaign would cover at no charge from your Kenworth dealer.
VIN vs. PACCAR Spec Sheet — What Each One Covers
The 17-character VIN is a chassis identifier, not a full build record. It encodes 10–15 key build attributes: model series, engine family, GVWR class, cab type, model year, and assembly plant. The PACCAR spec sheet (also called the factory data card) captures every factory-ordered option — engine horsepower rating, axle ratio, PTO provisions, suspension air-bag specification, fifth-wheel height, and aftertreatment calibration. Parts buyers who need component-level fitment on PACCAR MX13 injection systems, TX-18 transmission internals, or rear-axle differentials need the spec sheet alongside the VIN decode.
For non-Kenworth Class 8 trucks, the semi-truck VIN lookup guide covers all heavy-truck builders. For Kenworth specifically, any PACCAR Parts dealer can pull the factory data card by VIN — pair it with the decoded spec and a truck history report to confirm the truck's spec matches its paperwork before a major drivetrain parts investment.
The workflow that eliminates wrong-fitment returns: decode the VIN first (free, instant, confirms model series and engine family). Then request the PACCAR factory data card from the parts counter using the VIN. Together — decoded VIN plus factory build record plus engine serial from the dataplate — the three fields give the PACCAR Parts specialist everything needed to pull the correct part number the first time.
Kenworth parts-ordering checklist
- Decode the VIN to confirm model series (T680, W900, W990, T880, T380/T480)
- Identify engine family (PACCAR MX-13 / MX-11 vs. Cummins X15/X12)
- Note model year (position 10) to confirm emissions tier (EPA07, EPA10, GHG17)
- Confirm transmission type (Eaton Fuller, UltraShift, PACCAR TX-12/TX-18)
- Verify axle configuration (6x4, 4x2, 6x2) for chassis hardware
- Check open NHTSA recalls — brake and aftertreatment components may be covered free
- Supply decoded spec + engine serial to PACCAR Parts for exact OEM part numbers
Start with the free VIN decode — paste the Kenworth VIN here:
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Kenworth Parts Lookup by VIN — Frequently Asked Questions
The questions fleet managers, owner-operators, and used-Kenworth buyers ask most when ordering parts by VIN.
How do I look up Kenworth parts by VIN?+
To look up Kenworth parts by VIN, decode the 17-character VIN using CarCheckerVIN to surface the model series (T680, W900, W990, T880, T380/T480), engine family (PACCAR MX-13, MX-11, or Cummins X15), GVWR class, cab configuration, model year, and assembly plant. Bring the decoded spec to a PACCAR Parts dealer or authorized Kenworth service center and supply the engine serial from the engine dataplate as well. The PACCAR Parts specialist cross-references both in the factory catalog to return the correct OEM part numbers. CarCheckerVIN decodes the VIN and checks open NHTSA recalls; the parts counter identifies the part numbers.
What does the Kenworth VIN tell me about the engine?+
The Kenworth VIN descriptor section (positions 4–8) encodes the engine family — PACCAR MX-13, PACCAR MX-11, or Cummins X15 or X12 — and the GVWR class. The full engine serial, horsepower calibration, and emissions variant live on the engine dataplate mounted on the engine block, not in the 17-character VIN string. For parts ordering on injection, turbocharging, or aftertreatment systems, you need both the VIN-decoded engine family and the engine serial from the dataplate. Presenting both to the PACCAR Parts counter guarantees the correct fitment before you spend on expensive diesel components.
What WMI does Kenworth use?+
US-built Kenworth trucks carry the World Manufacturer Identifier 1XK — this covers the T680, W900, W990, T880, T800, T380, T480, and K370 cabover lines assembled in Chillicothe, Ohio, and Renton, Washington. 1NK is also assigned to Kenworth. Legacy units from the Ste-Thérèse, Quebec plant appear with different WMI codes on older trucks. If a truck claimed to be a Kenworth carries a VIN that does not begin with 1XK or 1NK, investigate the origin before purchase or a major parts investment.
Where is the VIN on a Kenworth T680?+
On a Kenworth T680, the primary VIN location is the driver-door jamb FMVSS label — a white placard that also lists GVWR, front GAWR, rear GAWR, and tire inflation specs. The dashboard VIN plate is visible through the lower driver-side corner of the windshield from outside. A third VIN is frame-stamped on the left-side rail near the front axle and is readable even if the cab is damaged or replaced. The commercial registration, title, and insurance certificate also list the VIN. Always use the full 17-character string from the door-jamb label for parts lookups.
Can I get Kenworth part numbers from the VIN alone?+
No — the VIN alone does not return OEM part numbers. The VIN decodes to the build spec (model series, engine family, model year, GVWR class, axle configuration, cab type), which a PACCAR Parts dealer cross-references in the OEM catalog — along with the engine serial from the engine dataplate — to return the correct part numbers. CarCheckerVIN provides the decoded build spec and open recall status; the PACCAR Parts counter uses the decoded spec to identify the specific part number for your truck's configuration. Attempting to order heavy-truck drivetrain components without the decoded spec is the leading cause of wrong-fitment returns.
What is PACCAR Parts and how does it relate to Kenworth?+
PACCAR Parts is the official parts distribution network for both Kenworth and Peterbilt, both owned by PACCAR Inc. PACCAR Parts distributes genuine OEM components through a network of dealers and Parts Distribution Centers across North America. For a Kenworth parts lookup by VIN, supply the decoded spec — model series, engine family, model year, and axle configuration — to the nearest PACCAR Parts dealer or authorized Kenworth service center. They can also pull the PACCAR factory data card by VIN, which contains the full build record used for precision parts cross-referencing.
Does a Kenworth VIN lookup show title history?+
Yes. A Kenworth VIN lookup through CarCheckerVIN checks the VIN against NMVTIS-sourced title brand records (flood, salvage, junk, rebuilt, lemon-law buyback), open NHTSA recall campaigns, and available odometer or ECM-hour snapshots from title transfers. For used Kenworth buyers and fleet managers, knowing the title history alongside the decoded spec reveals whether a truck was rebuilt after a major loss, whether prior fleets completed open recall work, and whether the odometer reading is consistent with state title transfer records. The free lookup covers key flags; a full truck history report surfaces every dated line item.
What is the difference between Chillicothe and Renton-built Kenworths for parts?+
Both Kenworth assembly plants — Chillicothe, Ohio, and Renton, Washington — build the T680, T880, and W990 on the same PACCAR platform. Parts fitment is generally determined by model series, engine family, model year, and axle configuration rather than assembly plant. However, some plant-specific or build-date-specific campaigns have appeared in NHTSA recall data, and the PACCAR parts catalog may require plant code for narrow supersessions on certain body and electrical components. The decoded VIN (position 11 = plant code) and the factory build date on the door-jamb label together give the parts counter all the information needed to resolve any plant-specific fitment questions.
Decode Your Kenworth VIN and Order the Right Part
Enter any 17-character Kenworth VIN to surface the model series, PACCAR MX engine family, emissions tier, and axle configuration your PACCAR Parts counter needs — free, no account required.
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