If your BMW is feeling a bit sluggish, getting worse gas mileage, or that check engine light came on, it might be time for a new mass air flow sensor. This MAF sensor is a direct replacement for part numbers 13627551638, 5WK97508Z, 74-50082, and MAS0287. It fits a bunch of BMW models including 128i (2008-2013), 328i and 328xi (2007-2013), 528i and 528xi (2008-2011), X3 (2007-2010), X5 (2007-2010), and Z4 (2010-2011) with various 3.0L engines. The mass air flow sensor is pretty important - it measures how much air is coming into your engine so the computer can add the right amount of fuel. When it goes bad, your car can run rough, hesitate when accelerating, or even stall out. This replacement uses platinum connector threads which means better electrical connections and faster response to changing engine conditions. It's built to precisely match the OEM output curves so your scan tools will read accurately and everything works like it should. They've done 100% resoldering of critical components inside, which means fewer intermittent failures and longer life compared to some cheaper alternatives. Installation is usually pretty straightforward - it's typically located between the air filter and engine intake. If you're experiencing any of those drivability issues I mentioned, swapping out your MAF sensor might be the fix you need. Definitely way cheaper than dealership parts, and it comes with the quality to back it up.
Free 30-day returns 
Free 30-day returns
