Service bulletins for the 2018 BMW 230i
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.
168 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Engine are shown. Show all
| B120916 | 2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. N20 - The Service Engine Soon Light is On with DME Fault 118602 Stored. The Service Engine Soon light is on (MIL) with only the following oxygen sensor fault stored. 118602 - Oxygen sensor before catalytic converter, fine mixture control: exhaust gas after catalytic converter too lean CAUSE An actual engine related problem and/or DME software diagnostic |
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| B122018 | 2018-10-09. Service bulletin. ENGINE. SERVICE ACTION: PROGRAM CONTROL UNITS (DME): The check engine light is illuminated and the vehicle may run roughly |
| B120418 | 2018-10-09. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING. BUZZING NOISE FROM VALVETRONIC MOTOR BEFORE OR AFTER ENGINE OPERATION: Buzzing noise may be heard from the Valvetronic motor when the vehicle is unlocked, before the engine is started, or after the engine is turned off. |
| B120718 | 2018-05-21. Service bulletin. ENGINE. DME FC 1C0102 IS STORED WITH NO OTHER RELATED FAULTS: The following fault has been stored in the Digital Motor electronics (DME) fault memory with no other engine oil pressure faults stored. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.