| Rank | Board name and description | Posts | Members |
|---|
| 1 | VW vortex forums
Volkswagen and related car brands discussion boards | 57399763 | 495265 |
| 2 | Honda tech
Honda cars enthusiasts forums | 34644340 | 297178 |
| 3 | NASIOC Forums
Forums of the North American Subaru Impreza Owners Club | 27924765 | 220852 |
| 4 | Bimmerforums
BMW car brand message boards | 17320015 | 245590 |
| 5 | E46 fanatics
BMW 3-series owners community | 10683108 | 153198 |
| 6 | Houston imports
Houston import race scene forums | 9918572 | 45491 |
| 7 | Pirate 4x4
4x4 message boards | 9178517 | 146691 |
| 8 | Montreal racing
Car racing in Quebec (in french and english) message boards | 6204710 | 57062 |
| 9 | Mustang world
Ford Mustang fanatics message boards | 5681245 | 48162 |
| 10 | VA Driven
Virginia automotive ethusiast forum | 5662726 | 42670 |
| 11 | Tampa Racing
Car racing community | 5388274 | 73519 |
| 12 | 3SI
Mitsubishi 3000GT/Stealth forums | 5118680 | 30550 |
| 13 | DFWstangs
Ford Mustand discussion forums | 5110181 | 36857 |
| 14 | Maxima.org
Nissan maxima fanatics forums | 4973706 | 81360 |
| 15 | SXOC
Nissan 200SX owners club forums | 4906564 | 22286 |
| 16 | Bimmerfest
BMW owners community | 4575562 | 174127 |
| 17 | Jeepsunlimited.com Forums
Discussion and marketplace about Jeeps | 4107706 | 103154 |
| 18 | 3.8 mustang
Ford mustang owners community | 4055360 | 23056 |
| 19 | Super Honda
Honda owners community | 4039818 | 149519 |
| 20 | MIGWeb
Vauxhall - Opel message boards | 3982786 | 48638 |
| 21 | Honda-Acura.net
Honda cars message boards | 3871561 | 104160 |
| 22 | BARF
Bay Area Riders Forum | 3274696 | 22566 |
| 23 | SG House
Singapore property and rental forum | 2730264 | 32697 |
| 24 | TDI Club
VW TDI engine message boards | 2728400 | 71229 |
| 25 | Club WRX
Subaru Impreza owners community | 2249922 | 60097 |
| 26 | Great Lakes 4x4
4x4 message board | 1872353 | 12861 |
| 27 | DTM Power
BMW tuning forums | 1578729 | 68549 |
| 28 | Acura world
Honda Acura forums | 1507400 | 44100 |
| 29 | Honda Society
Honda owners community | 1464235 | 13966 |
| 30 | Club Grand Prix
Pontiac grand prix discussion forums | 1384425 | 14900 |
| 31 | Fiesta Turbo
Ford Fiesta tuning message boards | 1370289 | 10631 |
| 32 | Forums Hawaii
Hawaiian automotive community | 1026116 | 28212 |
| 33 | Club GTI
GTI cars discussion forum | 952547 | 9878 |
| 34 | SLUniverse
Second Life forums | 815691 | 8758 |
| 35 | Airstream Forums
Airstream caravane owners community | 754515 | 37877 |
| 36 | Lille Hardware
Computer hardware community | 750996 | 5080 |
| 37 | ClemsonTalk
Clemson University forums | 704422 | 2969 |
| 38 |
Cars message board | 254556 | 1017 |
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