Producers
- Caffaro
- Camellia
- Camozzi
- Capauto
- CAR
- Caramba
- Car-Dex
- Carface
- Cargen
- Cargo
- Cargoparts
- CarLife
- Carlson
- Casco
- CASE IH
- Caster
- Castrol
- Caterpillar (CAT)
- Cautex
- Cavo
- CCL
- CDN
- C.E.I.
- Celikyay
- Celsior
- Centauro
- Centric Parts
- Cevam
- Champion
- Cheeft
- Chempioil
- Chery
- Chicago Pneumatic
- CHMZ
- Chrysler
- Cifam
- Citroen/Peugeot
- Claas
- Clark
- Clean Filters
- Clear Light
- ClimAir
- Cobra Tuning
- Cofle
- Cojali
- Comline
- Comma
- Commercial Ignition
- Concord
- Contech
- Continental
- Contitech
- Convoy
- CoopersFiaam
- Coram
- Corteco
- Covind
- Coyote
- CQ
- Craft Bearings
- CRB
- Crona
- Crown
- CS20
- CS Germany
- CTR
- CTR-SRL
- CX
- Cyclon