The BMW ActiveHybrid 3 was first shown at the North American International Auto Show back in 2012. The vehicle was based on the 335i sedan from the manufacturer that has a 54 hp electric motor. It's designed to be like a sports sedan that has good fuel economy - and accelerates from 0 to 60 in around 5.2 seconds.
Like any type of vehicle, you are going to need to purchase maintenance parts or replace parts on the car at some point in time. It's important to shop for quality replacements that aren't going to wear out on you shortly after install, which is where OEM parts come into play. OEM parts are designed to work specifically for your make and model. This helps to ensure that once you've made the repair, other components in your vehicle aren't going to become damaged due to an improper fit. Shopping OEM for your BMW should give you a peace of mind.
OEM BMW parts are a lot easier to find than the right aftermarket part. This is because OEM parts are designed for your car specifically, so there's not going to be a huge variety that you have to sift through. You can simply plug in your VIN and find the right components for any job.