At 12 years of age commenced racing in the NZ Formula Vee championship. Heimgartner became the youngest driver in the world to win a Formula Ford Championship at the age of fifteen when he won the New Zealand Formula Ford Championship during the 2010–11 season. He returned to successfully defend his title for the 2011–12 season whilst contesting selected events in the 2011 Australian Formula Ford Championship. 2013 Selected races in Australian Formula 3.
In 2012, Heimgartner entered the inaugural season of the New Zealand-based V8SuperTourer series, driving a Holden VE Commodore run by AV8 Motorsport. He finished the sprint championship in tenth place overall, achieving a best result of fourth place at Hampton Downs Motorsport Park; and seventh place in the endurance championship, with his best finish being fifth place in the Fathers' Day 400 at Taupo Motorsport Park. He was classified eleventh overall at the end of the season.
Moving from AV8 Motorsport to the Melbourne Performance Centre and then Motorsport Networks teams during a four-season period. Heimgartner went on to become the only driver to compete in every race of the championship over the 4-year period. Achieving 15 podium finishes.
Parallel to his appearances in the V8Supertourer category in 2012, Heimgartner contested the Australia-based Porsche Carrera Cup series at the age of 16. Andre ran as high as 4th for much of the season before a no fault contact by a competitor caused a DNF. 2013 Dunlop V8 Supercar Series, driving an ex-Dick Johnson Racing Ford FG Falcon entered by Finance EZI Racing, which entered Heimgartner alongside Josh Hunter as the team's drivers. In 2014 Andre drove for Matt White in the supercar Dunlop series with 3 podium finishes.
Also in 2013 saw Andre's first drive in a V8 Supercars Holden Commodore VF. Due to his close association with Paul Morris he got to do co-driver laps in Dean Fiore's No. 88 Lucas Dumbrell Motorsport entry at Queensland Raceway replacing Matt Halliday in the dedicated co-driver session.
In 2014, Heimgartner was selected to race the Super Black Racing wildcard entry at the 2014 Supercheap Auto Bathurst 1000 alongside fellow Kiwi Ant Pedersen. Following this performance the team retained him in the teams' full-time category début the following season. 2015 was a formative year for the new Superblack team and was plagued by performance inconsistencies. A best qualifying position of 3rd and numerous top 10 finishes for the 2015 season. Andre's second year in Supercars and severe budget constraints lead to relocation to the minnow LDM team, car performance and reliability issues produced disappointing results.
In 2013, Heimgartner contested the Bathurst 12 Hour event at the Mount Panorama Circuit in Bathurst, New South Wales. Sharing a BMW 335i with co-drivers Anthony Gilbertson and Peter O'Donnell, Heimgartner finished the race first in his class. In NZ Heimgartner as a 14-year-old won the Mini Challenge 3-hour endurance classic. As a 16-year-old driving ab RSR Porsche while leading the field by 15 laps suffered a terminal mechanical issue 10 minutes from the chequered flag. Achieved various successes in endurance competition driving GT3 Porsches for Fastway and Hood. Competed in 2 seasons of V8 Supertourer endurance competition with Paul Morris as co-driver.
By February 2018 Andre had completed 4 consecutive Bathurst 1000 endurance events with a best placing of 9th.
Supercars Championship results
Complete Bathurst 1000 results
|2014||Super Black Racing||Ford Falcon FG||Ant Pedersen||11th||161|
|2015||Super Black Racing||Ford Falcon FG X||Ant Pedersen||DNF||35|
|2016||Lucas Dumbrell Motorsport||Holden Commodore VF||Aaren Russell||DNF||114|
|2017||Brad Jones Racing||Holden Commodore VF|| Tim Slade
|2018||Nissan Motorsport||Nissan Altima L33||Aaren Russell||16th||161|
|2019||Kelly Racing||Nissan Altima L33||Bryce Fullwood||DNF||157|
|2020||Kelly Racing||Ford Mustang Mk.6||Dylan O'Keeffe||11th||161|
|2021||Kelly Grove Racing||Ford Mustang Mk.6||Matt Campbell||NC||159|
|2022||Brad Jones Racing||Holden Commodore ZB||Dale Wood||DNF||4|
‡Walsh was entered as a co-driver to Slade but withdrew and was replaced with Heimgartner.
- "Youngest ever Motorsport Champion to join AV8 Motorsport in new V8 SuperTourer race series". V8 SuperTourers. 3 June 2011. Retrieved 25 February 2013.
- "VIDEO: 17-year-old duo set for Dunlop V8 Series". Speedcafe.com. 21 February 2013. Retrieved 25 February 2013.
- "YOUNG GUNS SCORE CO-DRIVER LAPS WITH LDM". Speedcafe.com. 26 July 2013. Retrieved 15 October 2013.
- "Super Black Bathurst drivers announced". v8supercars.com.au. 2 August 2014. Retrieved 3 August 2014.
- "Super Black confirms full-time V8 Supercars entry". speedcafe.com. 28 November 2014.
- 2013 Liqui Moly Bathurst 12 Hour Mount Panorama Liqui Moly Bathurst 12 Hour www.natsoft.com.au[permanent dead link] Retrieved on 11 February 2013
- "Heimgartner shares excitement over engagement".