# Service bulletin 11\-163\-16

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.

- Type: Service bulletin
- NHTSA id: 10140507
- Published by NHTSA: 2018\-06\-11
- Manufacturer's number: 11\-163\-16
- Manufacturer's date: 2016\-04\-15
- NHTSA component: ENGINE; FUEL SYSTEM, OTHER

## NHTSA's summary

This bulletin announces availability of reprogramming files for optimization of the ECM. The files will address customer concerns of a lack of engine power output resulting from reduced turbocharger boost at high ambient temperatures while using 91 octane fuel.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10140507-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10140507-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Fuel system

## Vehicles listed

- 2015 to 2016 SUBARU WRX STI

## Recalls for the same vehicles and component

- [16V162000](/recalls/nhtsa/16V162000.md), 2016-03-21: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

## Other bulletins for the same vehicles and component

- [02\-193\-24R](/bulletins/11034269.md), 2026-07-02, Service bulletin: ENGINE. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\). \(This is an revised version of the original bulletin.\)
- [09\-74\-21R](/bulletins/11034264.md), 2026-07-02, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\). \(This is an revised version of the original bulletin.\)
- [02\-193\-24R](/bulletins/11033065.md), 2026-06-01, Service bulletin: ENGINE. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\).
- [15\-300\-22R](/bulletins/11027982.md), 2026-02-02, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start \(RES\).
- [09\-74\-21R](/bulletins/11027090.md), 2026-01-06, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\).
- [18\-226\-25R](/bulletins/11027083.md), 2026-01-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 \(Immobilizer Key Collation Diagnosis\).
- [18\-228\-25R](/bulletins/11027081.md), 2026-01-06, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 \(POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1\) and P2097 \(POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1\) are detected by the Engine Control Module \(ECM\).
- [18\-228\-25](/bulletins/11025790.md), 2025-12-01, Service bulletin: ENGINE; ELECTRICAL SYSTEM. This bulletin announces the diagnostic procedures to be used when DTCs P2096 \(POST CATALYST FUEL TRIM SYSTEM TOO LEAN BANK 1\) and P2097 \(POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 1\) are detected by the Engine Control Module \(ECM\).
- [07\-235\-25](/bulletins/11023536.md), 2025-10-02, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; ENGINE. In the interest of customer satisfaction Subaru of America, Inc. \(SOA\) is extending the New Car Limited Warranty coverage in the models listed. The extension will address instances of “phantom braking” or the EyeSight/RAB systems causing unnecessary stoppage/slowing of the vehicle.
- [02\-193\-24R](/bulletins/11022313.md), 2025-09-02, Service bulletin: ENGINE. This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components \(e.g. intake valves and / or manifold, and combustion chambers\).

JSON: [/v1/bulletins/10140507](/v1/bulletins/10140507)

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