When you've spent a lifetime conquering some of the world's most challenging race tracks, you might think you're prepared for anything life throws at you.
For Australian motorsport legend Marcos Ambrose, his greatest battle wasn't fought behind the steering wheel.
One of Ambrose's most brutal battles was not in the racetrack, but in hospital rooms and treatment centres across two countries.
The 49-year-old racing driver was the third Australian in history to undergo a liver transplant with Stage IV colorectal cancer.
After his surgery and a two-year health journey, Ambrose has gone public to talk about his experience.
Prior to his health setbacks, Ambrose achieved what many thought impossible for an Australian driver.
Marcos Ambrose claimed back-to-back V8 Supercars Championships in 2003 and 2004, securing 28 victories in 147 starts. He later on chased his American dream in NASCAR.
In NASCAR's top tier, he became the first Australian to win Cup Series races, claiming victory at Watkins Glen International in both 2011 and 2012.
He also collected four additional wins at the same track in the Nationwide Series.
His success on road courses was legendary among racing fans, earning him respect in one of America's most competitive sporting arenas.
When everything changed overnight
The motorsport world has always known Ambrose as someone who keeps his private life private.
Married to his wife, Sonja, with two daughters, Adelaide and Tabitha, he has built his reputation on letting his driving do the talking, which makes his decision to share this deeply personal story all the more significant.
The diagnosis came after what he thought was a routine issue.
He developed a sore shoulder after recently competing in the Bathurst 6 Hour with George Miedecke.
He initially attributed his fatigue and difficulty exercising to the natural ageing process.
'I felt a bit tired, I was struggling to exercise, but you know, I was just getting old,' Ambrose explained at the Pirtek Legends Night on the Gold Coast.
The sore shoulder was actually caused by inflammation in his liver, where the cancer had already spread.
Within 12 hours of that doctor's visit, he received a terminal Stage IV colorectal cancer diagnosis.
The fight of his life
What followed was an intense chemotherapy regimen that initially seemed like a holding pattern against an unstoppable disease.
The doctors had deemed the cancer inoperable, leaving treatment as the only option to manage his condition.
Yet, sometimes, persistence pays off in ways no one expects.
Ambrose's chemotherapy sessions were successful than anticipated, opening a window of opportunity for recovery.
'I'm one of the lucky ones, I guess, that the chemotherapy worked hard and opened a window for a couple of surgeries to try to get in front of it,' Ambrose shared.
'We were opened up to a possibility, subject to a lot of criteria, to do a liver transplant.'
Did you know?
While colorectal cancer can develop without noticeable symptoms (as in Ambrose's case), potential warning signs include:
Changes in bowel habits lasting more than a few days
Blood in stool (bright red or very dark)
Persistent abdominal discomfort, cramps, or pain
Unexplained weight loss
Weakness or fatigue
Iron deficiency anaemia
The transplant journey
Becoming eligible for a liver transplant meant relocating his entire life.
Ambrose and his family had to move from their home in Launceston to Sydney, where he would wait by the phone for the call that could save his life.
The decision also meant leaving their daughter Adelaide in Tasmania to finish school.
The emotional toll was perhaps the heaviest burden. 'It was awful for me to think my kids might not see a good dad again,' he reflected.
Eventually, that crucial call came. The surgery that followed made him just the third person in Australia to undergo such a procedure for his specific type and stage of cancer.
Living with survivor's guilt
Twelve months post-transplant, Ambrose is feeling great and living life 'as fast as I can.'
However, success brings its own challenges.
'You could sit here one-year post risky, major operation and a diagnosis of a terrible cancer, and to be here where we are today, it's just a miracle,' he shared in an interview.
'If there's something that I struggle with, it's actually guilt—guilt that I've been one of the lucky ones.'
The importance of routine checks
Ambrose's story carries a crucial message for all of us, particularly those over 50: routine health checks can be literal lifesavers.
His cancer had no apparent symptoms—no pain, no obvious warning signs.
If he hadn't seen a doctor about that sore shoulder, the outcome might have been very different.
The National Bowel Cancer Screening Program provides free screening kits to Australians aged 50-74 every two years.
Early detection significantly improves treatment options and survival rates.
READ MORE: 'I'm focusing on strength': Courtney Murphy's honest reflection on life amid his cancer diagnosis
A call for organ donation awareness
The most important part of Ambrose's public revelation is his advocacy for organ donation.
His life was saved by someone else's generous decision to be an organ donor—a gift that has given him the chance to see his daughters grow up and continue contributing to the community he loves.
Australia has made significant improvements in organ donation rates in recent years, but there's still work to be done.
Every organ donor can save up to seven lives and help many more through tissue donation.
While Marcos Ambrose's racing days are behind him, he's found new ways to stay involved in the sport, recently working as crew chief in the Australian TA2 (Trans-Am) Series.
His story serves as a powerful reminder that champions aren't just made on race tracks—they're revealed in how we face life's unexpected challenges.
For Ambrose, sharing his journey publicly isn't about seeking sympathy; it's about using his platform to save other lives through awareness and advocacy, potentially.
Have you had your routine health screening recently? What aspects of Ambrose's story resonated most with you? Share your thoughts and well-wishes for Ambrose in the comments below.
Primary source
Aussie motorsport legend goes public with secret cancer battle
The 49-year-old received a terminal diagnosis after complaining of a sore shoulder.
7news.com.au
Marcos Ambrose—Wikipedia
Cited text: 'In 2023, Ambrose was diagnosed with Stage IV colorectal cancer. He underwent a liver transplant, just the third Australian in history to have such a p...'
Excerpt: The 49-year-old racing driver was the third Australian in history to undergo a liver transplant with Stage IV colorectal cancer.
Marcos Ambrose | Australian Motorsport Hall of Fame
Cited text: 'A dedicated Ford racer Ambrose made 147 V8 Supercar starts in Falcons for 28 victories and consecutive Championships, impressively going back-to-back...'
Excerpt: Marcos Ambrose claimed back-to-back V8 Supercars Championships in 2003 and 2004, securing 28 victories in 147 starts. He later on chased his American dream in NASCAR.