Replacement MAF
Mine has 8873 miles logged on it. One year's worth of driving in freezing temps (1 week

) and hot Texas temps. I tried it because of one single review: "Used this for my X5 (e53), and it went in easy, and fixed my Service Engine Soon light immediatly. For ~$20, you can't beat this aftermarket product. 10/10 would buy again. 10/10 worth the purchase even if you aren't sure that your SES light is due to the MAF. It is good to replace them every 100k miles or so anyway." Other reviews are BMWs too.