# C2521 on the 2016 Subaru Impreza

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name C2521

- [10213177](https://open.wenmarpro.com/bulletins/10213177), 2022-06-03: This bulletin announces the Service Manual correction for the diagnostic trouble tree for DTC C2521 and/or DTC 21.