| Rank | Board name and description | Posts | Members |
| 1 | VW vortex forums Volkswagen and related car brands discussion boards | 44578214 | 392242 |
| 2 | Honda tech Honda cars enthusiasts forums | 32305576 | 288318 |
| 3 | NASIOC Forums Forums of the North American Subaru Impreza Owners Club | 21396674 | 170539 |
| 4 | Bimmerforums BMW car brand message boards | 12617286 | 174594 |
| 5 | Houston imports Houston import race scene forums | 8040489 | 38933 |
| 6 | E46 fanatics BMW 3-series owners community | 7710747 | 118918 |
| 7 | Pirate 4x4 4x4 message boards | 7051858 | 114071 |
| 8 | Jeepsunlimited.com Forums Discussion and marketplace about Jeeps | 5959772 | 94168 |
| 9 | Montreal racing Car racing in Quebec (in french and english) message boards | 5205865 | 49769 |
| 10 | Mustang world Ford Mustang fanatics message boards | 5102912 | 40792 |
| 11 | Maxima.org Nissan maxima fanatics forums | 4973706 | 81360 |
| 12 | 3SI Mitsubishi 3000GT/Stealth forums | 4334367 | 28856 |
| 13 | DFWstangs Ford Mustand discussion forums | 4050816 | 26293 |
| 14 | Tampa Racing Car racing community | 4003632 | 53343 |
| 15 | VA Driven Virginia automotive ethusiast forum | 4001875 | 31227 |
| 16 | SXOC Nissan 200SX owners club forums | 3962519 | 17589 |
| 17 | Super Honda Honda owners community | 3744470 | 137292 |
| 18 | MIGWeb Vauxhall - Opel message boards | 3520960 | 39581 |
| 19 | 3.8 mustang Ford mustang owners community | 3368446 | 19785 |
| 20 | Honda-Acura.net Honda cars message boards | 3332368 | 91071 |
| 21 | BARF Bay Area Riders Forum | 3274696 | 22566 |
| 22 | Bimmerfest BMW owners community | 3133131 | 119994 |
| 23 | TDI Club VW TDI engine message boards | 2127721 | 56196 |
| 24 | Club WRX Subaru Impreza owners community | 2082831 | 52056 |
| 25 | DTM Power BMW tuning forums | 1578729 | 68549 |
| 26 | Club Grand Prix Pontiac grand prix discussion forums | 1384425 | 14900 |
| 27 | Fiesta Turbo Ford Fiesta tuning message boards | 1370289 | 10631 |
| 28 | Acura world Honda Acura forums | 1327584 | 34392 |
| 29 | Honda Society Honda owners community | 1266253 | 12550 |
| 30 | Cars message board | 1075613 | 3141 |
| 31 | Great Lakes 4x4 4x4 message board | 1067834 | 6319 |
| 32 | Forums Hawaii Hawaiian automotive community | 966543 | 28676 |
| 33 | Club GTI GTI cars discussion forum | 952547 | 9878 |
| 34 | Lille Hardware Computer hardware community | 710037 | 4855 |
| 35 | ClemsonTalk Clemson University forums | 664792 | 2629 |