Fire Pub-Sub event in Lightning Web Components

Vehicle.css

.ele1{
    background-color: #BBB;
    padding:50px;
    border-radius: 25px;
    margin-top:20px;
    margin-left:10px;
    margin-right:10px;
    cursor: pointer;
}

.subComp{
    background-color: #fff;
    border-radius: 25px;
    margin:10px;
    padding:30px;
}

Vehicle.html

<template>
    <div class="ele1">
        Vehicle Component -  {log}
        <div class="subComp">
             <c-tesla  
                onmodelclick={captEvent}></c-tesla>  
        </div>
        <div class="subComp">
            <c-honda> </c-honda> 
        </div>
    </div>  
</template>

Vehicle.js

import { LightningElement, track } from 'lwc';
import pubsub from 'c/pubsub' ; 
export default class Container extends LightningElement {
    @track log = '';  
    captEvent(evt){
        this.log = this.log+' '+evt.detail;
        pubsub.fire('uniqueEventId', evt.detail);
    }
}