Development of the ZB Commodore began in 2012 as a joint project between Holden and Opel, producing what would become the next-generation Insignia platform adapted to Australian conditions. Holden completed over 100,000 km of local testing between 2012 and 2017, tuning the steering, suspension, and exhaust specifically for Australian roads and driver expectations. The car differed meaningfully from the European Insignia in its more direct steering, revised chassis calibration, and the addition of a 3.6-litre LGX V6 engine not offered in Opel or Vauxhall markets.
The ZB entered production as a direct consequence of Holden closing its Australian manufacturing facilities at Elizabeth and Fishermans Bend on 20 October 2017. It was the first Commodore in forty years not to offer a V8 powertrain option, and the first in thirty years to include a four-cylinder engine as standard. These departures from tradition contributed to public backlash and historically low sales.
The ZB was available in two body styles — a five-door liftback and a five-door station wagon (Tourer) — across two distinct character lines: Luxury (LT, Calais, Calais-V) and Sport (RS, RS-V, VXR). The two lines were distinguished visually by unique front and rear bumpers, side skirts, and exhaust tips.
Engine options included a 2.0-litre turbocharged four-cylinder petrol, a 2.0-litre diesel, and a 3.6-litre V6 petrol. Four-cylinder models were exclusively front-wheel drive; V6 models used an all-wheel drive system with GKN Twinster torque-vectoring, the same system found in the Ford Focus RS.
The flagship VXR featured IntelliLux Matrix LED headlights, Brembo front brakes, FlexRide adaptive suspension, Michelin Pilot Super Sport tyres on 20-inch alloys, and a Bose audio system. The Calais-V topped the luxury range with a sunroof, 360-degree camera, and massaging front seats.
The ZB achieved a five-star ANCAP safety rating, confirmed by an audit test conducted on the Australian V6 specification following initial certification based on the European 1.6-litre variant not sold locally.
For motorsport purposes, the ZB Commodore was raced in the Supercars Championship by Holden-aligned teams from 2018. The race cars shared only exterior styling with the road car — an outer shell was built to resemble the production model over a rear-wheel drive tube frame chassis powered by the same V8 engine used in the previous VF Commodore. A turbocharged V6 development programme intended for 2019 competition was cancelled in April 2018 due to engineering concerns over competitiveness.
The ZB proved an immediate success on track, prompting Ford to seek upgrades for its ageing FGX Falcon in its final year. Scott McLaughlin's DJR Team Penske Falcon won the 2018 championship, and the Mustang GT dominated from 2019 to 2020. The ZB rebounded with Shane van Gisbergen winning both the 2021 and 2022 championships, sending the Holden nameplate out in competitive fashion.
At Bathurst, the ZB Commodore won the Bathurst 1000 in 2018, 2020, 2021, and 2022. It accumulated 87 Supercars race victories in total and delivered Holden's final Bathurst win, championship, and race win before the brand's retirement from motorsport.
Sales of the ZB began in February 2018. Consumer uptake was the lowest of any Commodore generation, with November 2019 recording just 309 units sold — the lowest monthly figure since the original VB Commodore launched in 1978. Production was halted in October 2018 due to slow sales and unsold dealer stock.
The ZB Commodore and the Commodore nameplate were discontinued at the end of 2020. Two months later, in early 2021, General Motors retired the Holden brand entirely from the Australian market.
The ZB represents both the conclusion of the Commodore's 42-year road car history and a complicated final chapter — commercially unsuccessful as a passenger car yet triumphant on the racetrack. Its motorsport legacy is defined by van Gisbergen's back-to-back Supercars titles and four Bathurst 1000 victories, giving Holden a dignified competitive send-off even as the showroom product failed to resonate with Australian buyers.