# Service campaign NCU \- 2026050002

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 campaign
- NHTSA id: 11033194
- Published by NHTSA: 2026\-06\-02
- Manufacturer's number: NCU \- 2026050002
- Manufacturer's date: 2026\-05\-15
- NHTSA component: ENGINE

## NHTSA's summary

Mercedes\-Benz AG \(“MBAG”\), the manufacturer of Mercedes\-Benz vehicles, has determined that on certain Model Year \(“MY”\) 2026 G\-Class \(465 platform\) vehicles, the low temperature coolant bleed line may chafe under certain circumstances. MBUSA will conduct a service campaign. An authorized Mercedes\-Benz dealer will install a spacer ring on the low\-temperature coolant line of the affected vehicles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033194-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033194-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2025 MERCEDES\-BENZ G 550

JSON: [/v1/bulletins/11033194](/v1/bulletins/11033194)

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