{"nhtsa_id":11023979,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-10-07","date":"2025-09-10","document_id":"LI01.40-N-077649","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Oil Leak at Vibration Damper Area Complaint Oil leakage observed near the vibration damper, traced to a faulty radial shaft sealing ring at the front crankshaft flange. (see photo in attachment) Cause The sealing lip of the radial shaft sealing ring has worn a groove into the front crankshaft flange. This wear compromi- ses the sealing integrity between the crankshaft and the radial shaft sealing ring in its original assembly position. Remedy Install a crankcase cover equipped with a design-optimized radial shaft sealing ring. This updated sealing ring features a revised lip structure that relocates the sealing surface outside the worn area of the crankshaft.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023979-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023979-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023979","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"SPRINTER 1500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_freightliner_sprinter","2024_freightliner_sprinter"]},{"make":"FREIGHTLINER","model":"SPRINTER 2500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_freightliner_sprinter","2024_freightliner_sprinter"]},{"make":"FREIGHTLINER","model":"SPRINTER 3500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_freightliner_sprinter","2024_freightliner_sprinter"]},{"make":"FREIGHTLINER","model":"SPRINTER 4500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_freightliner_sprinter","2024_freightliner_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 1500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 2500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 3500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 4500","year_from":2023,"year_to":2024,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}