OEM vs. Aftermarket Auto Glass: What’s the Real Difference? Introduction When it comes to windscreen replacement, one of the most common questions we get at NF Windscreens is: “Is the glass original?” If you’ve never had to replace your windscreen before, you may not realise that there are two types of glass available: OEM (Original Equipment Manufacturer) and Aftermarket (also called OEE — Original Equipment Equivalent). These terms might sound technical, but don’t worry. We’ll