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Service bulletins for the 2018 Subaru Impreza

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.

528 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Crankcase ventilation (PCV) are shown. Show all

Bulletins, newest first
WUP-01R2019-11-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE AND ENGINE COOLING. Subaru of America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
WUP-012019-11-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); ENGINE AND ENGINE COOLING. Subaru f America, Inc. (Subaru) is initiating a new safety recall for certain 2017-2018 model year Impreza vehicles and certain 2018 model year Crosstrek vehicles in which the Positive Crankcase Ventilation (PCV) valve may be defective.
11-189-192019-03-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This Service Information bulletin announces a change to the required thread sealer used when installing the PCV valve into the engine block. The previously used material may solidify and cause damage to the engine block threads during PCV valve removal.
02-175-18R2018-11-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This bulletin announces a design change to the PCV valve used on the models listed above. Customers may have concerns of white smoke from the exhaust and / or in some cases, excessive engine oil consumption.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.