Metra
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The best Metra parts for a Subaru audio upgrade are the retention adapters in this collection: the Metra USB Adapter to Retain Stock USB Ports for the 2015 WRX, 2015 STI, 2014-2015 Forester, and 2013-2014 Crosstrek, and the Metra Subaru 5-Pin Camera Retention adapter for 2015-up Subaru models with a 7-inch screen. They keep factory USB and backup-camera functions working when the head unit changes, so check your year, model, and screen size before ordering.
Swapping a head unit is easy; keeping everything the car already does is the hard part. Without the right retention adapter, an upgrade can leave dead USB ports or a backup camera that no longer displays. These Metra pieces are specific to the Subaru years and screens named in their titles — they are not universal adapters.
Plan the adapter purchase with the head unit itself. The iDoing head units for 2015+ Subaru collection is the natural pairing here, and our interior overhaul guide for the WRX and STI walks through the bigger cockpit picture before you spend anything.
Brands to know for Subaru interior electronics
Metra is the brand behind both adapters here, and its specialty is exactly this unglamorous layer of car audio: the interfaces and harnesses that let aftermarket equipment talk to factory wiring and features. A USB retention adapter and a 5-pin camera retention adapter will never be the exciting part of a build, but they decide whether the finished install feels factory or unfinished. Buy the adapter listed for your car rather than improvising connections.
iDoing supplies the Android head units many 2015+ Subaru owners upgrade to, and retention adapters matter most on exactly those swaps. Pairing head unit and adapter in one order avoids a half-finished dash. Compare screen and trim fitment for your year first.
iWire is the Subaru wiring specialist in this store, known for harnesses and electrical solutions built around Subaru platforms specifically. When a job goes beyond a single adapter — a swap or a merged harness — iWire is the collection to browse next. Its Subaru-only focus is the appeal.
SMY ClusterMaker rounds out the cabin electronics picture with Subaru gauge pods and cluster solutions, useful when an audio upgrade grows into a fuller interior refresh. Browse Interior Accessories and Interior Trim and Accessories for the matching trim and finishing pieces.
Frequently asked questions
Will the Metra USB adapter fit my Subaru?
The USB adapter here is listed for the 2015 WRX, 2015 STI, 2014-2015 Forester, and 2013-2014 Crosstrek. If your car is outside those years and models, check your year and model for a different adapter instead of assuming this one fits.
What does the 5-pin camera retention adapter do?
It lets the factory backup camera keep displaying after an aftermarket head unit is installed, on the 2015-up Subaru models with a 7-inch screen named in the listing. Confirm your screen size before ordering.
Do I need these adapters if I keep the factory head unit?
No. Retention adapters solve problems created by changing the head unit. If the factory unit stays, your USB ports and camera already work.
Are these adapters hard to install?
They are plug-in adapters rather than cut-and-splice parts, but dash disassembly still requires care. If you are not comfortable behind the dash, have an audio shop install them.