# Service bulletin 07\-002\-21\-3774a

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: 10202688
- Published by NHTSA: 2021\-10\-31
- Manufacturer's number: 07\-002\-21\-3774a
- Manufacturer's date: 2021\-10\-08
- NHTSA component: EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING:COOLING SYSTEM

## NHTSA's summary

Some vehicles may experience that the A/C does not blow cold air \(blows warm air\) due to a refrigerant leak. This is caused by a crack in the cooler pipe \(HI\) A \(1\) due to engine vibration. To correct this issue, the material and thickness of the cooler pipe \(HI\) A has been changed to increase durability \(pipe diameter has been changed from 12mm to 16mm\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202688-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202688-9999.pdf)

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

## Components

Engine, Equipment and accessories, Heating and air conditioning, Cooling system

## Vehicles listed

- 2016 to 2020 MAZDA MX\-5

## Other bulletins for the same vehicles and component

- [07\-002\-21\-3774](/bulletins/10188019.md), 2021-03-03, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. Some vehicles may experience that the A/C does not blow cold air \(blows warm air\) due to a refrigerant leak. This is caused by a crack in the cooler pipe \(HI\) A \(1\) due to engine vibration. To correct this issue, the material and thickness of the cooler pipe \(HI\) A has been changed to increase durability \(pipe diameter has been changed from 12mm to 16mm\).

JSON: [/v1/bulletins/10202688](/v1/bulletins/10202688)

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