🔧 ACDelco Professional Drive Belt Tensioner Assembly with Pulley - 39112 model Review

My car squeaked and the belt came off the pulley about 1/8 inch. Replaced the pulley and the noise is gone. Great fit and easy installation.

I replaced the belt tensioner because it was slightly bent causing the belt to go off center and eventually my belt came loose. This solved my problem and it took 10 minutes to replace the part. 10/10 No mechanic required.

Took about 20 minutes to install, very easy. The quality is top notch. Made in Germany. It came with an aluminum screw. Be sure to take a photo of the serpentine belt route, it's really worth it, don't buy the cheaper ones.

Perfect for my 2006 BMW 330i. My original tensioner lost its position and caused my drive belt to slip off center. Rather than buying a $200 replacement from your local dealer, I settled on this $70 gem. I couldn't be happier. It fits perfectly and only took 30 minutes to install. It's been up for 6 months now and still works perfectly.

My brother's 330i serpentine belt broke once resulting in an immediate loss of power steering. We replaced the belt but it slipped every 1-2 miles of ride. Replacing the tensioner was the final step to this puzzle. Easy to fix and the part seems very reliable. I will buy one for my 330i as it should now. Same year, same model, so think about it

This is an EXACT OEM replacement part for BMW n52 engines. It comes in an Acdelco box but has the same markings as the original part removed from the car including "Made in Germany" and all the casting marks except the more recent date of course. That's at least half the price you'll find elsewhere. You will need to replace the mounting screw as it is a torqued aluminum piece. I paid 4€ for the screw at the dealer. Super easy 15 minute job to replace this with a 328 using only T60 and E14…