How to Replace Mass Airflow Sensor 2001-05 BMW 325Xi

What's up guys? I'm Andy from 1A Auto. In this video, I'm going to show you how to replace the mass air flow sensor on this 2001 BMW 325xi. If you need this part or other parts for your vehicle, click the link in the description and head over to 1AAuto.com.

I'm going to disconnect this connector right here on the top of the mass air flow sensor and just push down. Pull that connector off. Take a straight blade screwdriver, loosen up this worm clamp. We can slide this boot off. Slide it back. There's some clips over here. There's a clip on this side. Pop that off, and then one on this side. You can use the screwdriver or you can just try to use your fingers and pull that off, and we can slide this out.

Just like that. Here's the old mass air flow sensor. Here's the new mass air flow sensor from 1AAuto.com. As you can see, the shape is the same, connector is the same. It's the same on the back. It's the same diameter. Get yours at 1AAuto.com, and you can do it yourself.

When we go to install the mass air flow sensor, there is an arrow directing which way the air flow goes. So the air flow comes in through the air box, goes through the mass air flow sensor, and into the engine, into the intake manifold.

We're going to slide this in this way. There is an O-ring on the inside of the air box right there, so make sure that O-ring is positioned right. This O-ring is all mangled up, so keep in mind it's a good idea to replace that O-ring if it's messed up.

So we'll just slide this in position. With that pushed all the way in, we can then clip it on, push those clips on. If you struggle with getting this on, you could pull the whole air box off. There's just four clips that clip that on, and then that snorkel has to be pulled off.

All right. Now we're going to reinstall this intake tube and the worm clamp. Slide that in position. Get this lined up first. Just like that, line it up. Take a straight blade screwdriver. Tighten this down. There we go. Just tighten that up. Take the connector, line it up. Plug it in.

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