# Service bulletin 18\-056\-15

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: 10149695
- Published by NHTSA: 2018\-12\-03
- Manufacturer's number: 18\-056\-15
- Manufacturer's date: 2015\-07\-24
- NHTSA component: POWER TRAIN

## NHTSA's summary

Clicking Noise From Auxiliary Water Pump Relay This bulletin involves reprogramming of the Powertrain Control Module \(PCM\) with the latest software. A small number of customers may experience a clicking type noise coming from the engine area while driving. The concern may be caused by rapid activation and deactivation of the auxiliary water pump relay. This software update will improve the activation and deactivation cycle of the auxiliary water pump relay.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10149695-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10149695-0001.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2015 ALFA ROMEO 4C

JSON: [/v1/bulletins/10149695](/v1/bulletins/10149695)

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