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| Category | Formula One | ||||||||
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| Constructor | Sauber | ||||||||
| Designer(s) | Leo Ress (Technical Director) Ian Thomson (Head of Chassis Design) Seamus Mullarkey (Head of Aerodynamics) | ||||||||
| Predecessor | Sauber C17 | ||||||||
| Successor | Sauber C19 | ||||||||
| Technical specifications | |||||||||
| Chassis | Moulded carbon fibre composite structure | ||||||||
| Suspension (front) | Double wishbones, pushrod | ||||||||
| Suspension (rear) | Double wishbones, pushrod | ||||||||
| Engine | Petronas SPE 03A (Ferrari), 80° V10, NA | ||||||||
| Transmission | Sauber seven-speed longitudinal sequential semi-automatic | ||||||||
| Fuel | Petronas | ||||||||
| Tyres | Bridgestone | ||||||||
| Competition history | |||||||||
| Notable entrants | Red Bull Sauber Petronas | ||||||||
| Notable drivers | 11.  Jean Alesi12.  Pedro Diniz | ||||||||
| Debut | 1999 Australian Grand Prix | ||||||||
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| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
The Sauber C18 was the car with which the Sauber team competed in the 1999 Formula One World Championship. It was driven by Frenchman Jean Alesi, in his second year with the team, and Brazilian Pedro Diniz, who joined from Arrows.