The son of well-known car safety expert Max Danner, Christian started motor-racing in the Renault 5 cup. He advanced to Formula 2 and set the F2 lap record of the current configuration of the old Nürburgring, which was used only in 1983 for international racing.
Danner won the inaugural Formula 3000 championship in 1985, and debuted in Formula One on 15 September 1985 for the all-German team Zakspeed. He eventually participated in 47 Grand Prix events. His best result was 4th at the 1989 United States Grand Prix for Rial. He also managed one 6th place whilst driving for Arrows.
Danner competed in Japanese Formula 3000 in 1990 driving for Leyton House's F3000 team. He scored 4 points and was ranked 14th.
Danner later raced in Champ Cars and also in the International Touring Car Championship for Alfa Romeo. He currently takes part in Grand Prix Masters.
He is also an F1 commentator for the channel RTL in his native Germany.
| Year | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | Team | WDC | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | Zakspeed | BRA | POR | SMR | MON | CAN | USA | FRA | GBR | GER | AUT | NED | ITA | BEL Ret | EUR Ret | RSA | AUS | Zakspeed | - | 0 |
| 1986 | Osella | BRA Ret | ESP Ret | SMR Ret | MON DNQ | BEL Ret | CAN Ret | USA Ret | FRA 11 | GBR Ret | GER Ret | HUN Ret | AUT 6 | ITA 8 | POR 11 | MEX 9 | AUS Ret | Arrows | 18th | 1 |
| 1987 | Zakspeed | BRA 9 | SMR 7 | BEL Ret | MON EX | USA 8 | FRA Ret | GBR Ret | GER Ret | HUN Ret | AUT 9 | ITA 9 | POR Ret | ESP Ret | MEX Ret | JPN Ret | AUS 7 | Zakspeed | - | 0 |
| 1989 | Rial | BRA 14 | SMR DNQ | MON DNQ | MEX 12 | USA 4 | CAN 8 | FRA DNQ | GBR DNQ | GER DNQ | HUN DNQ | BEL DNQ | ITA DNQ | POR DNQ | ESP | JPN | AUS | Rial | 21st | 3 |