2005 Australian Production Car Championship
The 2005 Australian Production Car Championship was a CAMS sanctioned national motor racing title open to Group 3E Series Production Cars. It was organised by the Production Car Association of Australia and was the 12th Australian Production Car Championship. The title was won by Colin Osborne driving a Toyota Celica.
Race calendar
The championship was contested over a seven round series with three races per round. Race 1 at each round utilised a mass standing start and Races 2 and 3 at each round featured a handicap standing start.| Round | Circuit | Date | Round winner | Car |
| 1 | Wakefield Park | 26-27 February | Derek Hocking | Holden VY Commodore SS |
| 2 | Mallala | 16-17 April | Derek Hocking * | Holden VY Commodore SS |
| 3 | Queensland Raceway | 2-3 June | Drew Russell | Honda S2000 |
| 4 | Eastern Creek | 23-24 July | Scott Anderson | Holden VZ Commodore SS |
| 5 | Phillip Island | 20-21 August | Colin Osborne | Toyota Celica SX |
| 6 | Oran Park | 17-18 September | Leigh Mertens | Proton Satria GTi |
| 7 | Eastern Creek | 3-4 December | Steve Briffa | Toyota Celica SX |
- Note: Hocking was subsequently disqualified from Round 2 due to illegally modified suspension components
Points system
Points for class and outright were awarded on race results as follows:| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th & other finishers |
| Points | 30 | 25 | 22 | 20 | 18 | 16 | 14 | 12 | 10 | 8 | 6 | 4 | 2 | 1 |
In addition, the fastest competitor in each Class in Qualifying was awarded 3 points towards both class and outright.
Race 1 at each round had points awarded for class titles only and Races 2 and 3 at each round had points awarded for both class and outright titles.
Competitors registered as “Trophy” competitors are not eligible to score points in the championship.