The 1998 BMW Z3 is available in three models, 1.9, 2.8 and the M Roadster. New for 1998, all models include the addition of new rollover bars, while the base prices remain unchanged. The Z3 roadster features a manual convertible top, while the Z3 M comes with an electrically powered top. Dual power outside mirrors and sport bucket seats in leatherette (1.9) and leather (2.8 & M) are also available. Security features consist of a coded driveaway protection system. When locked from the outside, the Z3 roadsters double-locking anti-theft feature prevents the doors from being opened, even if someone gains access to the interior. Options on the Z3 include automatic transmission, heated seats, a power top and an on-board computer.