Exterior:
Paint Quality:
Some reports indicate that the paint on the Holden Commodore ZB is susceptible to easy scratching, with clear coat and paint fading and peeling, especially around water channels and the windscreen.
Sun exposure appears to exacerbate these issues, and cars regularly garaged and well-maintained seem to be less affected.
Concerns arise about potential costs for a quality full respray or wrap if peeling issues persist.
Tail Lights and Body Kit Parts:
Owners have reported instances of water leakage through the tail lights, potentially due to seal issues.
Sporadic reports mention body kit parts coming loose or rims cracking, though these aren’t considered common complaints.
Inside:
Air Conditioning Issues:
Failing air conditioning is a common issue, often attributed to a/c lines being routed too close to the engine, leading to rubbing and gas leaks.
Problems typically arise around the 80,000km mark, but many have been resolved under warranty or during routine servicing.
Some owners have reported issues with air conditioning condensers.
Electrical Gremlins and Interior Trims:
Occasional reports mention odd electrical glitches, such as the start/stop system not working or infotainment glitches, though these are not widespread.
Some owners have experienced rattles and squeaks, possibly due to loose plastic clips or modules controlling the infotainment and stereo coming loose under the dash.
Few reports of interior trim plastics lifting and center console covers not closing, but these are not considered common issues.
Overall Reliability:
Despite some reported issues, a majority of owners report a fault-free ownership experience.
Mechanically:
2.0 Petrol Turbo 4 Cylinder:
Part of the Ecotec engine family, historically known for reliability issues, though the ZB’s version is improved.
Occasional problems with timing chains, turbos, and oil consumption, often linked to poor servicing.
Rare issues include high-pressure fuel pump failures and reports of throttle body and APP glitches.
Diesel Engine:
Manufactured by Fiat, known for injector seal and oil leak problems, common to other vehicles.
Generally reliable but may face challenges with unique components in this specific model in Australia.
Timing belt replacement required every 120,000km.
V6 Engine:
Significantly different from previous Commodore 6-cylinders, with redesigned timing chains (now 2, not 3) and fewer reported complications.
Common issues include thermostat failure, cooling problems (often covered under warranty), and potential future carbon buildup due to direct injection.
Recall for brake booster and ABS control module complications.
Increasing reports of transmission and rear diff issues on all-wheel drive models, with fluid changes sometimes resolving odd noises.
Occasional shift selector position complications, typically manageable in-cabin issues.
Parts and Support:
A major concern is the availability of parts and support since Holden no longer exists.
While the ZB’s platform and powertrains are still in production globally, obtaining parts locally can be costly and time-consuming, considering shipping expenses and potential delays.
Recalls:
April 2018 – Incorrectly installed seatbelts in 2,194 Holden Commodore vehicles may increase the risk of injury to passengers in the rear left and right seats during accidents.
October 2018 – Holden Commodore: Fuel hose clip rubbing on fuel pump return hose may cause fuel leak and fire hazard.
November 2019 – Improperly welded cross-member in Holden ZB COMMODORE and BK ASTRA models may increase the risk of injury to occupants in rear-impact accidents.
January 2020 – Fuel hose clip rubbing on the fuel pump return hose in Holden Commodore models from 2018 to 2020 may cause a fuel leak, posing a potential risk of fire and injury to occupants and property.
August 2022 – Holden ZB Commodore (2017-2020) has a manufacturing defect in the brake booster, affecting 13,898 units, which could lead to increased stopping distance and pose a risk of accidents causing serious injury or death.