Suspected company went bankrupt.
Although not directly mentioned, it's in the same period and excise taxes are typically imposed on certain petroleum products, fuel-inefficient vehicles and air conditioners designed for automobiles.
"The $133 million write off by the CRA was approved by CRA Commissioner Bob Hamilton in the same period that saw a March 2018 write off of a government bailout loan to the now-bankrupt Chrysler corporation. That write off was approved by Finance Minister Bill Morneau and never announced, though CBC News later confirmed that the defunct Chrysler was the firm involved"