{"nhtsa_id":11036851,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-09-03","date":"2026-08-05","document_id":"LI18_40-N-080867_1_en","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"OM654 Engine Oil Consumption Complaint The customer may report repeated low engine oil level warnings in the instrument cluster. The customer may also state that engine oil must be added between scheduled maintenance intervals. During diagnosis, oil residue may be observed at the oil filler neck, cylinder head cover, crankcase ventilation connection, charge air pipes, charge air cooler, intake tract, or turbocharger area. In some cases, the complaint may be accompanied by increased diesel particulate filter (DPF) regeneration frequency or aftertreatment‑related fault entries. Cause Increased engine oil consumption may be caused by external oil leakage, crankcase ventilation system concerns, reduced oil separation efficiency in the cylinder head cover, turbocharger oil leakage, charge air system oil accumulation, fuel dilution, vehicle operating profile, oil level sensor plausibility concerns, or internal engine mechanical damage. A measured engine oil consumption test is required before a repair direction is determined. Customer‑reported oil additions or instrument cluster oil level messages alone are not sufficient to determine the repair. Remedy 1. Perform the engine oil consumption measurement according to AR18.00‑D‑ 0025TSM. 2. If the measured oil consumption is within specification, no repair related to engine oil consumption is required. • Verify the correct engine oil specification and review the vehicle operating profile, maintenance history, idle time, and regeneration frequency. If the complaint is based mainly on an oil level message and measured oil consumption is not confirmed, verify oil level sensor plausibility before continuing with engine oil consumption diagnosis. 3. If the measured oil consumption exceeds specification, inspect the engine for external oil leaks. • Pay close attention to the oil filler neck, oil filler neck seal, cylinder head cover area, oil filter housing, crankcase ventilation connections, turbocharger oil supply and return areas, and other visible sealing points. 4. If an external oil leak is identified, repair the leak according to the applicable repair instructions. • Correct the engine oil level and repeat the oil consumption measurement if necessary. 5. Inspect the crankcase ventilation connection, turbocharger inlet and outlet, charge air pipes, and charge air cooler for oil accumulation. • A light oil film alone does not confirm a turbocharger or engine failure. Oil pooling, heavy oil accumulation, debris, or oil migration into the intake tract requires further inspection. 6. If there is no clear external oil leak, no severe charge air system oil contamination, and no obvious turbocharger damage, inspect the crankcase ventilation system first. 7. Perform the crankcase ventilation shutoff valve leak‑tightness test according to AR01.40‑D‑0050TSM. 8. If the crankcase ventilation shutoff valve fails the leak‑tightness test, replace the shutoff valve and the cylinder head cover with integrated oil separator. Replace all required seals and hardware. 9. If the crankcase ventilation shutoff valve passes the leak‑tightness test, no external oil leak is identified, no abnormal turbocharger oil entry is found, and the engine mechanical condition is not suspect, replace the cylinder head cover with integrated oil separator. • Fill the engine with oil meeting MB 229.52 SAE 5W‑30 and repeat the engine oil consumption measurement according to AR18.00‑D‑0025TSM.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036851-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036851-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036851","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":["maintenance"],"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":2025,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter","2025_mercedes-benz_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 2500","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter","2025_mercedes-benz_sprinter","2026_mercedes-benz_sprinter"]},{"make":"MERCEDES-BENZ","model":"SPRINTER 3500","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_mercedes-benz_sprinter","2024_mercedes-benz_sprinter","2025_mercedes-benz_sprinter","2026_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":[]}