Freightliner Sprinter 1500 2019–2024 — technical service bulletin

Bulletin LI01.10-N-079275 · NHTSA communication 11023978 · issued Sep 26, 2025

Technical service bulletin

communication type

Engine

component

2019–2024

model years

vehicle entries

Official summary

Internal Diesel Engine Damage or Oil Sludge Formation Complaint Customer reports that the vehicle will not start, is difficult to start, or is making unusual noises. Inspection Findings: Upon inspection, engine bearings—including crankshaft, connection rod, and camshafts—exhibit significant signs of wear. Engine oil shows evidence of sludging, characterized by the presence of thick, gel-like, or semi-solid deposits within the engine. This condition is indicative of oil degradation and/or contamination. Cause Internal engine wear and starting issues are a result of oil sludging. This sludging o

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.