A damning report by MPs says Vauxhall had a "reckless disregard for safety" by not stopping owners of Zafira B vehicles driving, despite knowing they were a fire risk.
A parliamentary report also accused the motor manufacturer of being too slow to begin a full investigation into the risk.
The report by the Commons' Transport Select Committee found the firm then acted prematurely in attributing the problem to improper repairs by third parties.
- The affected cars are right-hand drive Zafira Bs.
- They were built between 2005 and 2014.
- All the models have manual transmission or no air conditioning.
Campaigners claim more than 300 Zafiras have caught fire in recent years - some serious enough to destroy entire vehicles.
In some cases, drivers were left with just a few seconds to escape.
Sue Freemantle from Ivybridge in Plymouth has never given up putting pressure on the firm to take action. She filmed the moment her car burst into flames and then discovered hundreds of other drivers had been affected.
She and fellow Zafira owner Claire Wheatley then took on Vauxhall, rallying other owners to the cause through Facebook.
Sue Freemantle is in no doubt that Vauxhall should be prosecuted over the issue.
Jo Hunt from Taunton is also campaigning about the Zafira Bs. She also thinks Vauxhall should be prosecuted. She told ITV News that she wants peace of mind about the vehicle because people are still experiencing problems.
ITV News asked Vauxhall about these concerns. This is the firm's response.