The 325is was an upgrade from the standard 325i, as some new features were added to the car as standard. These included the full electrics package, black roof-liner, BMW "is" body kit, BMW 14 inch BBS "Basketweave" wheels and a Close Ratio gearbox. Other features also found on the 325is were options, however over time, some have been mistaken for standard features. These options include a 25% Limited Slip Differential (LSD), M Sport suspension with Bilstein struts, M-Sport II Steering wheel, BMW sports seats, leather interior, sunroof and BMW 15 inch BBS wheels. Options differed on vehicles produced in the United States.
-saxet fra Wikipedia.