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Service bulletin 15-235-18

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10153181
Published by NHTSA2019-02-19
Manufacturer's number15-235-18
Manufacturer's date2018-11-08
NHTSA componentEQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM; EQUIPMENT

NHTSA's summary

This bulletin announces availability of new audio system amplifiers to address the following operating concerns with the Harman Kardon Gen 3 infotainment system: Symptom 1: No audio output is heard but, the volume level displayed changes when turning the knob Symptom 2: Audio volume increases to maximum intermittently without turning the knob Symptom 3: A buzzing, screeching or crackling-type sound is heard coming through the speakers.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories

Vehicles listed
SUBARU BRZ2018, 2019
SUBARU CROSSTREK2018, 2019
SUBARU FORESTER2019
SUBARU IMPREZA2017, 2018, 2019
SUBARU LEGACY2018, 2019
SUBARU OUTBACK2018, 2019
SUBARU WRX2019
SUBARU WRX STI2019 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20230622023-02-14. Electrical
23V0800002023-02-14. ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20212282021-04-15. Electrical
21V2640002021-04-15. ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM:IGNITION; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
19V7430002019-10-18. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM:IGNITION
18V7730002018-11-01. ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SubaruNet Announcement (M2026-10-05. Other. This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
SubaruNet Announcement (T2026-10-05. Other. This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
18-244-262026-10-05. Service bulletin. "This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circuit"
15-333-25R2026-10-05. Service bulletin. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. This is an revised version of the original bulletin.
15-322-25R2026-10-05. Service bulletin. In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the CP1 & Gen 3.1 Head Unit used in the listed models and model years to (8) eight years / 150,000 miles to cover certain qualifying repairs to the infotainment audio system. This is an revised version of the original bulletin.
15-304-22R2026-10-05. Service bulletin. This bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns. This is an revised version of the original bulletin.
12-269-25R2026-10-05. Service bulletin. This bulletin announces the service procedures to be followed when encountering instances of water intrusion from the sunroof area.This is an revised version of the original bulletin.
12-269-25R2026-09-03. Service bulletin. This bulletin announces the service procedures to be followed when encountering instances of water intrusion from the sunroof area. This is an revised version of the original bulletin.
15-308-23R2026-09-03. Service bulletin. This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current) in vehicles experiencing battery drain when the ignition is off, leading to no-start conditions or frequent jump-starts.This is an revised version of the original bulletin.
SubaruNet Announcement (C2026-09-03. Other. This Announcement provides diagnostic assistance for CVT issues.