| Rank | Board name and description | Posts | Members |
| 1 | Forum Auto Automotive discussion (in french) | 24412819 | 427603 |
| 2 | S2KI Honda S2000 owners community | 19094932 | 98239 |
| 3 | Elaborare Italian car and bike tuning community | 14595241 | 78893 |
| 4 | Lay it low Lowriding fans message boards | 14184611 | 71887 |
| 5 | Houston imports Houston import race scene forums | 10729659 | 63271 |
| 6 | Corsa Sport Vauxhall, Opel, and Holden message boards | 8092907 | 38365 |
| 7 | Jeep Forum Jeep message boards | 7171807 | 215268 |
| 8 | Automotive Forums Multi-brand automotive message boards | 6718566 | 714644 |
| 9 | Boostcruising Steet cruising and automotive forums | 5838159 | 140707 |
| 10 | NICO forums Nissan and Infiniti message boards | 5525619 | 148980 |
| 11 | Ford Truck World Ford trucks forums | 4593333 | 154775 |
| 12 | Super Honda Honda owners community | 4137103 | 159854 |
| 13 | TDI Club VW TDI engine message boards | 4115814 | 95648 |
| 14 | Honda-Acura.net Honda cars message boards | 4095587 | 107575 |
| 15 | MIGWeb Vauxhall - Opel message boards | 4090309 | 51124 |
| 16 | Beyond.ca Canadian car forums | 3973352 | 252983 |
| 17 | Civic Forums Honda civic enthousiasts forums | 3750455 | 49373 |
| 18 | Edmunds Automotive Forums | 2829351 | 397694 |
| 19 | Mercedes Shop Mercedes owners community | 1961753 | 39955 |
| 20 | V6 Performance Forum for owners of V6 powered cars | 1809606 | 79573 |
| 21 | Prelude online Honda prelude owners community | 1671099 | 62658 |
| 22 | Club Grand Prix Pontiac grand prix discussion forums | 1384425 | 14900 |
| 23 | Nissan forums Nissan owners message board | 1281183 | 110286 |
| 24 | Crownvic Crown Victoria and Ford V8 enthousiasts forums | 1209871 | 9093 |
| 25 | Car and driver General automotive discussion | 1146383 | 16705 |
| 26 | DSM talk Diamond star motors forums | 1040034 | 21582 |
| 27 | Freshalloy Nissan vehicles owners forums | 1029464 | 33805 |
| 28 | Miata.net Mazda Miata owners forums | 998300 | 19869 |
| 29 | The V Board Nissan Sentra discussion forum | 972071 | 11045 |
| 30 | Club GTI GTI cars discussion forum | 952547 | 9878 |
| 31 | Sound Domain Car audio hardware forums | 851050 | 48475 |
| 32 | J-Body GM enthusiasts forums | 835400 | 17292 |
| 33 | No Pistons Mazda RX7 message board | 810159 | 30127 |
| 34 | Car Forum Misfits Cars message board | 781767 | 1060 |
| 35 | Car Styling Car modification enthusiasts community | 752400 | 22277 |