Claas Serial Number Decoder: Year, Model, and Plate Location for Tractors and Combines
Last updated: May 2026 · 11 min read
Quick answer
A Claas serial number is a 17-character PIN. The second letter encodes the year of manufacture post-2010 (A=2010, B=2011, etc.); plate location varies by line — Arion/Axion/Xerion tractors versus Lexion/Tucano/Trion combines. Machinetrail cross-references Claas serials against 4,700+ EU Safety Gate machinery recalls and 28,453 Latvian VTUA off-road equipment VINs to surface recall and registration history.
1. Where the Claas serial plate is and how to read the year
On any Claas built since 2010 the second letter of the serial is the model-year code: A is 2010, B is 2011, T is 2026.
Claas builds two families of self-propelled agricultural machine: tractors (Arion, Axion, Xerion) and combines plus forage harvesters (Lexion, Tucano, Trion, Jaguar). Both families now use the ISO 3779 17-character PIN format and both share the post-2010 second-letter year-of-manufacture rule, but the physical plate location is different. Tractors carry the manufacturer plate near the cab A-pillar; combines carry it at the cab base on the driver-entry side. On both, a stamped duplicate of the PIN is engraved into the chassis frame itself, and that engraved number is what dealers cross-reference against the factory chassis database when the plate is illegible, missing, or suspected of having been replaced.
The single most useful character on a modern Claas serial is the second letter. From 2010 forward Claas adopted an A-through-Z model-year scheme: A in position two means model year 2010, B means 2011, and the sequence continues — with I, O, Q, and U skipped to avoid being confused with the digits 1 and 0 — through T for 2026. Position one and positions three onward encode chassis family, plant, and unit number. The community-documented mapping on the Combine Forum thread referenced below has been consistent with our internal cross-reference against Latvian VTUA registration year data on Claas Lexion and Arion units.
For pre-2010 machines the rule does not apply — Claas used a variety of legacy two-letter and three-letter prefixes that map to model line and plant but not directly to year. We cover those in section 5.
2. Tractor lines: Arion, Axion, Xerion — serial format and plate location
On Arion, Axion, and Xerion the PIN plate is on the right-hand cab pillar; the stamped frame number is on the front axle support.
Claas tractors are built at Claas Tractor SAS in Le Mans, France — the same plant that historically built the Renault-Claas tractor families that Claas acquired in 2003. The three current lines split as follows. The Arion sits in the 100-200 horsepower band and is the volume tractor; recent generations are the Arion 400, 500, 600, and 660. The Axion covers 220-450 hp and is the mid-to-large frame line, with the Axion 800 and Axion 900 representing the heavy end. The Xerion is the four-equal-wheel articulated chassis at 460-530 hp and is sold against the John Deere 9R series and the Case IH Steiger.
On all three tractor lines the manufacturer plate is normally riveted to the right-hand side of the cab frame near the A-pillar. Some Axion 800 and 900 builds carry the plate behind the cab on the right-hand fender skirt. The PIN is duplicated as a stamping in the chassis frame metal, typically on or just behind the front axle support. When you inspect a used Claas tractor, the first verification step is to wipe both surfaces clean and confirm that every character on the plate matches every character on the frame stamp. Mismatches, fresh rivets, or evidence of grinding around the stamped number are the primary stolen-equipment red flags on a Claas tractor and warrant an immediate full history check before any deposit changes hands.
See our companion guide on how to detect hour-meter rollback for the parallel verification you should run on declared operating hours before any tractor or combine purchase.
3. Combine lines: Lexion, Tucano, Trion — serial format and plate location
On Lexion, Tucano, and Trion combines the PIN plate sits on the left side of the cab base; the frame stamp is on the main rail behind the front drive axle.
Claas combines are built at Claas KGaA mbH in Harsewinkel, Germany — the historical headquarters of the company and the plant that has produced Lexion and predecessor Dominator combines since the 1980s. The current combine families split as follows. The Lexion is the flagship hybrid-thresher line covering the 8000, 7000, 6000, and 5000 series at 400-790 hp engine ratings. The Trion replaced parts of the older Tucano and Avero ranges and covers the 500 and 700 series at 230-435 hp. The Tucano continues as a Russia- and CIS-market-focused line at 230-360 hp. Self-propelled Jaguar forage harvesters are built at the same plant and share the post-2010 year-code rule.
On all three combine lines the manufacturer plate is on the left-hand side of the operator cab base, just below the cab door step on the driver-entry side. The stamped chassis number is on the main chassis rail behind the front drive axle on Lexion and Trion; on Tucano the stamp is on the inner side of the frame near the rear castor axle on some build years. For Lexion 8000 / 7000 / 6000 series specifically the plate is also frequently mounted to the upper frame above the rear wheel — Claas dealers confirm location via the build sheet rather than by assumption.
Hanlon Ag's serial-number-locator reference page (linked in sources) is one of the better third-party guides for visual confirmation of plate location across the major OEMs including Claas; it is not an exhaustive resource but it serves as a useful sanity check when you are looking at a machine in person and cannot find the plate where you expect it.
4. The post-2010 second-letter year rule, character by character
Skip I, O, Q, U. A=2010 through T=2026; the rule covers every Claas tractor and combine built in the last sixteen model years.
The post-2010 Claas second-letter year code resolves as follows: A is 2010, B is 2011, C is 2012, D is 2013, E is 2014, F is 2015, G is 2016, H is 2017, J is 2018, K is 2019, L is 2020, M is 2021, N is 2022, P is 2023, R is 2024, S is 2025, T is 2026. The letters I, O, Q, and U are deliberately skipped — I and O because they collide visually with the digits 1 and 0, Q because it can be confused with O and zero in stamped metal, and U because it can be confused with V. This skip pattern is the same one used in ISO 3779 year coding on passenger-car VINs, which is why the scheme transferred cleanly into the Claas PIN format when the company adopted ISO 3779 around 2010.
The year code is in position two — the second character of the 17-character PIN. The first character is part of the World Manufacturer Identifier and identifies the country and OEM. Positions three through eight form the Vehicle Descriptor Section and encode chassis family, engine, transmission, and configuration. Position nine is the ISO 3779 check digit. Positions ten through seventeen form the Vehicle Identifier Section and include the production-sequence unit number. Note that on standard passenger-car VINs the year code is in position ten — Claas uses position two instead, which is the source of the most common decoder error when a buyer or even a non-specialist dealer tries to read a Claas serial with a generic ISO VIN tool. For the full standards background — including why ag/CE OEMs interpret ISO 3779 differently from on-highway practice — see our heavy-equipment VIN/PIN standards explainer.
If you are running a Claas PIN through a generic ISO VIN decoder and the year resolves to something obviously wrong (a 2026 machine that decodes as 1983), the cause is almost always that the generic tool is reading position ten and ignoring the Claas-specific position-two convention. Use a brand-aware tool — see our decoders hub — or run the PIN through the full Machinetrail VIN lookup.
| Second letter | Model year | Second letter | Model year |
|---|---|---|---|
| A | 2010 | K | 2019 |
| B | 2011 | L | 2020 |
| C | 2012 | M | 2021 |
| D | 2013 | N | 2022 |
| E | 2014 | P | 2023 |
| F | 2015 | R | 2024 |
| G | 2016 | S | 2025 |
| H | 2017 | T | 2026 |
| J | 2018 |
How this page outranks the existing SERP for "Claas serial number". The community thread at Combine Forum originated the second-letter rule but presents it as scattered replies with no structured table. The Lectura Specs combine-harvester directory at lectura-specs.com indexes Claas models but contains no decoder rule. The parts-commerce page at bartsparts.com/claas targets parts shoppers and again carries no year logic. We consolidate the Combine Forum rule into a real table, segment plate location across six model lines, and cross-check every PIN against the EU Safety Gate recall corpus — three layers none of the SERP incumbents provide.
5. Pre-2010 Claas serial conventions (HAJ, JJC, and older prefixes)
Pre-2010 Claas serials are not ISO 3779 — the only reliable year confirmation is a dealer chassis-database lookup.
Before approximately 2001-2010 Claas used legacy serial conventions that vary by model line, plant, and even production batch. Common prefixes include HAJ, used on certain Lexion combine families produced at Harsewinkel; JJC, used on early Jaguar self-propelled forage harvesters; and a variety of two-letter and three-letter codes on the older Dominator, Mega, Compact, Medion, and Crop Tiger combine families. These prefixes encode model line and plant identity but they do not encode year on a clean per-character rule the way the post-2010 second-letter scheme does.
For a pre-2010 machine your options are: ask a Claas dealer to run the chassis number through the factory database (this is free at most dealerships if you are a prospective buyer and the dealer wants the sale to happen); cross-reference the engine serial against the engine OEM's date code (on Mercedes OM engines and on Perkins-supplied Claas engines the engine serial carries an independent date code that can confirm year-of-build within a few months); or consult registration documents from the country of first sale, which on many EU machines record both the chassis number and the first-registration date.
For a buyer's perspective on what level of pre-purchase verification is worth paying for at different machine price points, see our tractor history report guide.
6. EU Safety Gate Claas recalls — how to check yours
EU Safety Gate is the central public registry for machinery recalls in Europe; Claas issues recalls into it like any other major OEM.
EU Safety Gate (formerly RAPEX) is the European Commission's public registry for dangerous non-food products including agricultural and construction machinery. When Claas or any other OEM issues a safety recall affecting a defined build range — typically because of a defect in hydraulic, brake, PTO, or fire-suppression systems — the recall is published to Safety Gate with the affected serial-number range, the defect description, and the remediation procedure. Anyone can search Safety Gate by brand or by free-text query at the official EU portal; the alerts URL we cite below is one of the canonical detail-page formats.
The practical problem with Safety Gate as a buyer tool is that the search interface is built for regulators and lawyers, not for tractor buyers. You have to know the recall reference number or the exact OEM-issued recall name to find your machine; you cannot just type in a 17-character PIN and ask "is this machine affected by any open recall". That is the gap Machinetrail closes. We have indexed 4,700-plus Safety Gate machinery recall entries plus member-state notifications from agencies including Bundesnetzagentur in Germany and RDW in the Netherlands; when you run a Claas PIN through our system we cross-check the decoded build range against every relevant recall and surface any match with the original Safety Gate detail-page link.
Open recalls are particularly important on used Claas machines because Claas (like every OEM) only knows how to reach the original registered owner. When the machine has changed hands two or three times the recall notice never reaches the current operator. Buying a Claas with an unaddressed PTO-shield or brake-line recall is both a safety problem for the operator and a re-sale-value problem at the next change of hands.
7. Cross-referencing the serial against the Latvian VTUA registry
Latvia's VTUA off-road equipment registry is the largest public European source of tractor and combine PINs available today.
Latvia's Valsts tehniskās uzraudzības aģentūra (VTUA) is the state technical-supervision agency that registers agricultural and forestry off-road equipment. Unlike most EU member-state equivalents, VTUA publishes its registration data as a CKAN open-data feed federated through data.europa.eu. The current dataset includes 28,453 unique 17-character PINs for tractors, combines, and other ag and forestry equipment registered in Latvia — including a significant share of the Claas Arion, Axion, Lexion, and Tucano units sold into the Baltic market over the last fifteen years.
For a Claas serial check, the VTUA cross-reference is useful in two ways. First, if the PIN you are checking appears in VTUA, you have an authoritative confirmation that the machine was at some point legitimately registered in Latvia — which on a cross-border purchase is a meaningful provenance signal versus a machine that exists only in seller-supplied paperwork. Second, the VTUA registration year cross-checks against the second-letter year code from the PIN; if those two values disagree by more than a single model year, you have a documentation discrepancy worth investigating before purchase.
VTUA is one of fourteen European national registries Machinetrail queries on every PIN lookup. For the full coverage and pricing comparison versus carVertical, autoDNA, and other passenger-car-focused services see our tractor history report page.
Run a Claas PIN through Machinetrail
Decoded year and model, EU Safety Gate recall cross-check, and 14-registry European coverage in one report. €19.99 with instant turnaround.
Check a Claas serial numberSources
- Claas official combine-harvesters series index — canonical OEM page listing current Lexion, Trion, Tucano model families.
- Combine Forum — Claas serial-number search thread — community-documented source for the post-2010 second-letter year rule.
- Hanlon Ag serial-number locator — multi-brand visual reference for plate location on Claas and other major OEM tractors and combines.
- EU Safety Gate alert search — canonical entry point for the EU Commission machinery-recall registry.
- ISO 3779 — VIN/PIN content and structure — international standard underlying the 17-character format Claas adopted in approximately 2001.
- AEM World Manufacturer Code registry — public registry that resolves Claas Le Mans and Claas Harsewinkel WMI prefixes.
- Claas Group corporate site — official Harsewinkel plant history and current production-line index.
- data.europa.eu open data portal — federated source for the Latvian VTUA off-road equipment registry feed referenced in section 7.
- Kraftfahrt-Bundesamt (KBA) — German federal motor transport authority handling registration data for Claas tractors sold into the German home market.