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Service bulletin 15-235-18R

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 id10161818
Published by NHTSA2019-07-01
Manufacturer's number15-235-18R
Manufacturer's date2019-05-08
NHTSA componentEQUIPMENT

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

Equipment and accessories

Vehicles listed
SUBARU ASCENT2019
SUBARU BRZ2018, 2019
SUBARU FORESTER2019
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
26V4360002026-07-07. EQUIPMENT:OTHER:LABELS

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
03-91-23R2024-05-02. Service bulletin. This bulletin announces the design change made to the front drive axle shaft assemblies to address cases of a clicking/cracking-type sound heard when driving with the steering wheel in the fully locked (left or right) position.
FAQ 15-318-24R2024-05-02. Service bulletin. T16 VoLTE Warranty Extension (15-318-24R) Frequently Asked Questions.
15-318-24R2024-05-02. Service bulletin. This bulletin announces the availability of the DCM Bypass Box designed to be used as an alternative replacement part for Data Communication Module (DCM) in vehicles with no active STARLINK subscription. There will be a warranty extension for the DCM up to 8 years (96 months) or 150,000 miles.
09-119-242024-05-02. Service bulletin. This bulletin announces the extended warranty coverage for the Thermo Control valve (TCV) used the the models listed. The coverage will be extended to (15) fifteen years / 150,000 miles.
09-80-21R2024-05-02. Service bulletin. This bulletin announces availability of a new thermo control valve assembly. The new valve contains an enhanced stainless steel internal shaft for optimized durability along with advanced water proofing for the sensor portion.
07-218-23R2024-04-03. Service bulletin. To satisfy current supply demands, a new Subaru alternative replacement battery is now available.
15-256-19R2024-04-03. Service bulletin. This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1 Audio and Navigation head units (H/U) utilized in the models as listed.
15-236-18R2024-04-03. Service bulletin. This bulletin addresses the reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
7-219-23R2024-04-03. Service bulletin. To satisfy current supply demands, a new Subaru alternative replacement battery is now available.
15-257-19R2024-04-03. Service bulletin. "This Bulletin provides insight in response to both customer and retailer feedback resulting from the use of OBD-II port connected devices. These devices are often employed by insurance companies to monitor driver activity for premium calculations, and can cause DTC B2A15, a red telematics MIL to illuminate, or recurring STARLINK notification to retailers and emails to customers. "