| Rank | Board name and description | Posts | Members |
| 1 | Forocoches Spanish cars message boards | 140071768 | 593523 |
| 2 | Motor-talk.de German automotive discussion forums | 36742566 | 2308259 |
| 3 | Bimmerforums BMW car brand message boards | 24888589 | 556252 |
| 4 | Forum Auto Automotive discussion (in french) | 24412819 | 427603 |
| 5 | S2KI Honda S2000 owners community | 19094932 | 98239 |
| 6 | Elaborare Italian car and bike tuning community | 14595241 | 78893 |
| 7 | Scoobynet Subaru Impreza owners community | 10812778 | 132879 |
| 8 | Houston imports Houston import race scene forums | 10748936 | 63619 |
| 9 | EvolutionM Mitsubishi Lancer enthusiasts Community | 10701193 | 178673 |
| 10 | Rennlist Porsche owners forums | 10305023 | 131202 |
| 11 | Ferrari Chat Ferrari fans and owners community | 8281413 | 125867 |
| 12 | Corsa Sport Vauxhall, Opel, and Holden message boards | 8107406 | 38457 |
| 13 | Bimmerfest BMW owners community | 7515879 | 346596 |
| 14 | Jeep Forum Jeep message boards | 7171807 | 215268 |
| 15 | M3 Forum BMW M3 owners community | 6658617 | 161390 |
| 16 | VA Driven Virginia automotive ethusiast forum | 5988663 | 45167 |
| 17 | Boostcruising Steet cruising and automotive forums | 5838159 | 140707 |
| 18 | NICO forums Nissan and Infiniti message boards | 5525619 | 148980 |
| 19 | Supercars General automotive discussion forums | 5382589 | 353418 |
| 20 | MB world Mercedes-Benz owners message boards | 5371157 | 235900 |
| 21 | Mustang Forums Ford Mustang owners forum | 5341985 | 97420 |
| 22 | Modded Mustangs Ford Mustang tuning forums | 5296648 | 62897 |
| 23 | Probe Talk Ford Probe owners forums | 4677216 | 31295 |
| 24 | Ford Truck World Ford trucks forums | 4593333 | 154775 |
| 25 | Turbo Bricks Car performance forums | 4496759 | 43710 |
| 26 | TDI Club VW TDI engine message boards | 4137826 | 96691 |
| 27 | Super Honda Honda owners community | 4137286 | 160000 |
| 28 | Honda-Acura.net Honda cars message boards | 4095587 | 107575 |
| 29 | Civic Forums Honda civic enthousiasts forums | 3750455 | 49373 |
| 30 | 502 Streetscene Automotive Discussion Forum | 3522359 | 12954 |
| 31 | IWSTI Subaru Impreza STI owners community | 3475537 | 88273 |
| 32 | I-Club Subaru owners community | 3396951 | 47979 |
| 33 | Corsa-C UK Vauxhall Corsa C sports club | 3062415 | 20225 |
| 34 | Maxrev Honda message boards | 2907591 | 40334 |
| 35 | Edmunds Automotive Forums | 2829351 | 397694 |
| 36 | Calais Turbo Australian car forum | 2736354 | 41787 |
| 37 | Performance forums Cars and motorbikes performance forums | 2675856 | 40067 |
| 38 | Club WRX Subaru Impreza owners community | 2392001 | 73838 |
| 39 | Track Forum Racing discussion board | 2270308 | 9752 |
| 40 | RC web Racing car forums (in Thai) | 2158030 | 94117 |
| 41 | SR20 Forum Nissan SR20 community | 2116762 | 27425 |
| 42 | DSM tuners Eagle / DSM cars tuning forums | 2015216 | 85733 |
| 43 | Mercedes Shop Mercedes owners community | 1961753 | 39955 |
| 44 | Honda Society Honda owners community | 1898036 | 20400 |
| 45 | Zatzy Swedish car forum | 1866121 | 19006 |
| 46 | Audi World Audi cars owners message boards | 1824900 | 46200 |
| 47 | V6 Performance Forum for owners of V6 powered cars | 1811985 | 79638 |
| 48 | Columbus Racing Car racing community | 1676706 | 2922 |
| 49 | Hot Rodders Hotrodding discussion forum | 1623543 | 128166 |
| 50 | Max Bimmer BMW owners community | 1530060 | 25523 |
| 51 | Club Grand Prix Pontiac grand prix discussion forums | 1384425 | 14900 |
| 52 | Fiesta Turbo Ford Fiesta tuning message boards | 1370289 | 10631 |
| 53 | Auto Racing Brazilian car racing forums | 1308851 | 6529 |
| 54 | Nissan forums Nissan owners message board | 1281929 | 110578 |
| 55 | Crownvic Crown Victoria and Ford V8 enthousiasts forums | 1209871 | 9093 |
| 56 | UBRF.org Western New York Automotive Forum | 1162012 | 8093 |
| 57 | Tuning.pl Car tuning forum (in polish) | 1154240 | 9643 |
| 58 | Car and driver General automotive discussion | 1146383 | 16705 |
| 59 | Auto Extreme Car discussion board (in German) | 1108403 | 96999 |
| 60 | Miata.net Mazda Miata owners forums | 998300 | 19869 |
| 61 | Clio sport Renault Clio owners forum | 991798 | 9933 |
| 62 | Club GTI GTI cars discussion forum | 952547 | 9878 |
| 63 | Pagenstecher Tuning and performance forums (in German) | 869091 | 27692 |
| 64 | Jabbas World Car discussion site | 867937 | 48596 |
| 65 | Piston heads Automotive discussion forums | 864230 | 29300 |
| 66 | No Pistons Mazda RX7 message board | 810159 | 30127 |
| 67 | Mopar Chat Car tuning and performance forums | 789446 | 59403 |
| 68 | Focal jet Ford Focus owners community | 772099 | 12221 |
| 69 | Carros de Rua Brazilian Car Sound & Tuning forum | 708534 | 22517 |
| 70 | Chicago Velocity Chicago car enthusiast message board | 705946 | 3523 |
| 71 | Velocidad Maxima Car modifications forums (in spanish) | 607732 | 6442 |
| 72 | Texas Racing Scene Texas automotive forums | 549357 | 4829 |
| 73 | Eclipse Forums Mitsubishi Eclipse enthousiasts message board | 497616 | 13012 |
| 74 | Forums Hawaii Hawaiian automotive community | 324678 | 35293 |
| 75 | Racers Den Car racing forums | 66563 | 696 |
| 76 | Motorsport Forums - discontinued Car racing and rallying discussion board | 8459 | 19829 |
| 77 | Michigan Jeepers - discontinued Michigan Jeeps owners community | 310 | 4624 |