# Service bulletin TB\-26\-90\-01

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: 11036508
- Published by NHTSA: 2026\-08\-31
- Manufacturer's number: TB\-26\-90\-01
- Manufacturer's date: 2026\-05\-31
- NHTSA component: ELECTRICAL SYSTEM; EXTERIOR LIGHTING
- Manufacturer's system: Electrical: Lighting

## NHTSA's summary

Alignment of headlamps service procedure

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036508-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036508-9999.pdf)

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

## Components

Electrical system, Lighting

## Vehicles listed

- 2025 KARMA REVERO
- 2020 to 2022 KARMA REVERO GS\-6
- 2020 KARMA REVERO GT
- 2021 to 2022 KARMA REVERO GT
- 2020 KARMA REVERO GTS
- 2021 to 2022 KARMA REVERO GTS

## Recalls for the same vehicles and component

- [2024301](/recalls/tc/2024301.md), 2024-05-29: Lights And Instruments
- [24V379000](/recalls/nhtsa/24V379000.md), 2024-05-29: EXTERIOR LIGHTING:TURN SIGNAL

## Other bulletins for the same vehicles and component

- [SC\-26\-01\-01](/bulletins/11035263.md), 2026-07-28, Other: ELECTRICAL SYSTEM. Alert to service centers that 12 volt is no longer stocked in the karma distribution center
- [SC\-26\-01\-01](/bulletins/11035262.md), 2026-07-28, Other: ELECTRICAL SYSTEM. Alert to service centers that 12 volt is no longer stocked in the karma distribution center
- [CC\-26\-90\-01](/bulletins/11028740.md), 2026-02-11, Service campaign: ELECTRICAL SYSTEM. BL1035 update, A software update for MY2025 Karma Vehicles
- [SC\-90\-26\-01](/bulletins/11027300.md), 2026-01-07, Other: UNKNOWN OR OTHER; EXTERIOR LIGHTING. New fasteners are available for better headlamps
- [SC\-25\-01\-01](/bulletins/11026132.md), 2025-12-04, Other: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Information regarding vehicle locked or “Latched” ECMs. Several electronic control units \(“ECUs”\) found in the Karma Revero are configured in such a way that they are latched to a vehicle as assembled from assembly. This means that these units cannot be used in diagnostics by swapping them to a similar build vehicle. Particularly the ECM on the MY25 will now be latched module after BL1030 and can not be swapped between vehicles.
- [SC\-25\-90\-02](/bulletins/11024876.md), 2025-11-04, Service bulletin: ELECTRICAL SYSTEM. Install of recommended 12Volt battery maintainer
- [CC\-25\-94\-02](/bulletins/11015208.md), 2025-03-06, Service campaign: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. A software update for MY2025 Karma Vehicles
- [SC\-25\-90\-01](/bulletins/11015206.md), 2025-03-06, Other: ELECTRICAL SYSTEM. Illustrate access to 12\-Volt power for jump start and charging
- [RC\-24\-90\-01](/bulletins/11010305.md), 2024-11-07, Service campaign: EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Headlamp Control Unit Replacement Safety Recall. software in the control module required an update from the component supplier. replacing the module with the required software corrects compliance for FMVSS 108 concern
- [TB\-24\-94\-01](/bulletins/10251645.md), 2024-03-15, Service bulletin: EQUIPMENT:ELECTRICAL:INFOTAINMENT; ELECTRICAL SYSTEM. Remedy for infotainment module fan noise.

JSON: [/v1/bulletins/11036508](/v1/bulletins/11036508)

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