The woman who died in a car crash involving reality star Caitlyn Jenner has reportedly been hit with an $18.5million lawsuit.

Keeping Up With the Kardashians star Caitlyn was driving a black Escalade when it crashed into a Lexus, which was pushed into oncoming traffic, killing its driver – Kim Howe - on the Pacific Coast Highway in Malibu in February.

According to TMZ, Kim's estate has been hit with claims from five passengers of the Hummer her car hit in the incident.

The gossip site reports the passengers claim Kim was negligent when her car careered into oncoming traffic, although have not been specific as to how.

(Image: Flynet)

It comes as reports claim former Olympian Caitlyn, 65, is 'not likely' to be charged over the fatal smash because she allegedly braked "several seconds before impact".

It was previously reported the 65-year-old could be facing charges of misdemeanor vehicular manslaughter.

The lead detective investigating the crash handed the results of the case over to the Los Angeles County District Attorney's office this week.

The sheriff's department compiled a 161-page report on the incident, reportedly concluding that Caitlyn, 65, was driving too fast for road conditions, despite driving under the speed limit.

Video Loading Video Unavailable Click to play Tap to play The video will start in 8 Cancel Play now

However now a source has claimed to TMZ that attorneys in the Major Crimes unit, who reviewed the lengthy report, deemed it relevant that Jenner "braked several seconds before impact", to avoid hitting the Lexus.

The source claims it was a tragic, but not criminal, collision.

It's possible that misdemeanor vehicular manslaughter charges could still be filed, relating to Jenner's speed at the time of the crash, but according to TMZ - it's unlikely.

The four-vehicle crash on the Pacific Coast Highway seven people injured.

(Image: Splash)

"The District Attorney's Office will determine what, if any, charges will be filed in this case, or if there will be a request for further investigation,'" the department previously said.

A source previously told Radar Online: "It's unlikely Caitlyn will spend one day behind bars, because the maximum penalty for misdemeanor vehicular manslaughter is one year in jail. Caitlyn's driving record is essentially clean, and she has no prior criminal history."

Caitlyn, who was then known as Bruce, released an initial statement over the crash, but has not spoken publicly about the incident since.