# Service bulletin 37515.1.0

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: 11035007
- Published by NHTSA: 2026\-07\-14
- Manufacturer's number: 37515.1.0
- Manufacturer's date: 2026\-05\-06
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This is a Tech Journal \- If a customer experiences an Electric System Limited message along with reduced performance, and there are temperature\-related DTCs in the HLCM, the root cause may be restricted coolant flow to the HLCM. Please follow the advice under "Service" to test the HLCM cooling performance. HLCM \(High to Low Voltage Converter Module\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035007-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035007-9999.pdf)

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

## Vehicles listed

- 2025 to 2026 POLESTAR POLESTAR 3

JSON: [/v1/bulletins/11035007](/v1/bulletins/11035007)

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