# Service bulletin 08\-166\-26

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: 11031446
- Published by NHTSA: 2026\-04\-22
- Manufacturer's number: 08\-166\-26
- Manufacturer's date: 2026\-04\-18
- NHTSA component: LANE DEPARTURE: ASSIST

## NHTSA's summary

Rear Mid Range Radar \(MRR\) Bracket Revision Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● C00C4\-76 \- Rear Radar Module "A" \- Wrong Mounting Position. ● C00C5\-76 \- Rear Radar Module "B" \- Wrong Mounting Position. Customers may also comment on the following: ● Blind Spot Warning indicator displayed on the Instrument Panel Cluster \(IPC\). This bulletin involves replacing the right and left side rear MRR brackets.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031446-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031446-9999.pdf)

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

## Components

Driver assistance, Lane departure and lane keeping

## Trouble codes named

C00C4, C00C5

## Vehicles listed

- 2025 RAM 1500

## Other bulletins for the same vehicles and component

- [111785](/bulletins/11033880.md), 2026-06-16, Service bulletin: LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING. MODULE \- CENTRAL ADAS DECISION and DRIVER MONITORING
- [S2623000024](/bulletins/11031339.md), 2026-04-15, Service bulletin: LANE DEPARTURE: ASSIST. U0422\-00 Implausible Data From BCM Set In Central ADAS Decision Module \(CADM\).

JSON: [/v1/bulletins/11031446](/v1/bulletins/11031446)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2008-166-26&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11031446&vehicle=Service%20bulletin%2008-166-26)