5BN — All tires: LT245/75R16/C BW R/PE ST TL OOR (Special Equipment Option). This code identifies the factory tire specification, application, or spare-wheel equipment. Browse RPO codes →
My 2025 Cadillac CT5 has 5BN: “All tires: LT245/75R16/C BW R/PE ST TL OOR (Special Equipment Option). This code identifies the factory tire specification, application, or spare-wheel equipment” I am curious how this option has held up for other owners and whether it has caused any reliability, service, or parts-availability issues.
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Before buying, I would inspect the relevant component and take a photo of its label or part number. That often resolves whether the vehicle still has the factory configuration associated with 5BN.
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The safest interpretation is the one tied to the exact VIN, model year, platform, and market. In general, 5BN matches “All tires: LT245/75R16/C BW R/PE ST TL OOR (Special Equipment Option). This code identifies the factory tire specification, application, or spare-wheel equipment” but the included hardware can vary between applications.
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I would avoid buying retrofit parts until the connectors and module support are confirmed. Returning electronic or VIN-programmed components can be difficult.
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Check the production month as well as the model year. Mid-year changes are one reason two vehicles with the same badge can have different hardware or descriptions.
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Check the production month as well as the model year. Mid-year changes are one reason two vehicles with the same badge can have different hardware or descriptions.
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