BMW 5′ 6′ 7′ Series auto-dimming vs. heated mirrors

The side view mirrors on you BMW may be two different types. The more expensive is heated and also one has an auto-dimming function also called Electrochromic (EC). The second more popular option is only heated. Both mirrors have the same size mounting tabs but different connectors as seen below: 

we offer the euro aspheric option

51167228611 (old number 51167186589) USA LH Side EC
51167251585 (old number 51167186583) USA LH Side Non EC
51167251583 (old number 51167186581) EURO LH Side Aspherical Non EC