# C1AB4 on the 2025 Toyota Grand Highlander

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 C1AB4

- [11019359](https://open.wenmarpro.com/bulletins/11019359), 2025-06-06: Some 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor \(BSM\) system is inoperative, there is a BSM malfunction message on the multi\-information display \(MID\), or the driving assist information indicator is illuminated, along with one or more of the following Diagnostic Trouble Codes \(DTCs\) present: •C1AB413 – Outer Mirror Indicator \(Module "B" Side\) Circuit Open •C1AB513 – Outer Mirror Indicator \(Module "A" Side\) Circuit Open The BSM sensor software has been updated to reduce the possibility of these conditions.
- [11018356](https://open.wenmarpro.com/bulletins/11018356), 2025-05-15: Some 2024 – 2025 model year Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a condition where the Blind Spot Monitor \(BSM\) system is inoperative, there is a BSM malfunction message on the multi\-information display \(MID\), or the driving assist information indicator is illuminated, along with one or more of the following Diagnostic Trouble Codes \(DTCs\) present: •C1AB413 – Outer Mirror Indicator \(Module "B" Side\) Circuit Open •C1AB513 – Outer Mirror Indicator \(Module "A" Side\) Circuit Open The BSM sensor software has been updated to reduce the possibility of these conditions.