2001 325i engine vibration around 1700 to 2000 rpms

I would check the engine mounts and any shock absorbers for the engine.

This is common on Hondas. If you want the vibration to go away you can adjust the idle to be higher. That's a fairly common fix. There's not really anything wrong though as long as it's not missing. Every engine has a speed it likes to vibrate at depending on how it was designed/built.

I would agree with the mechanics as engine mounts will give the impression of vibrations as the movement is transferred into the body from the lack of insulation. Run the fault codes and look for injectors and HT lead failures . Have a fuel pressure test done on the manifold as low pressure will cause injector misfiring and that may be the vibration.

Fyi....I know this post is several years old but if my answer can help someone it's worth it. I took my car to the dealership today for literally this EXACT problem on my 2010 Scion xB with 125k miles. I read this post and was shocked to read that someone else's xB was behaving the same way under the same conditions. In 4th gear at around 38 MPH and 1500 RPMs I get a vibration and a noise that, like the OP said, sounds like you're going over a rumble strip. That's the perfect wat to describe it. The dealership told me that it needs a torque converter. They want to charge me a thousand for the part and another thousand for labor because they've got to take the whole transmission out of the car and it's going to take 2 days (really 9 hours, they said, but they'd be keeping the car 2 days). I'm currently calling around to see if ANYONE can do it cheaper, but just in case anyone else comes here looking for an answer to this question, I hope this helps. Torque converter might be your problem.

Sounds like its missing on one cylinder. Could be a failed plug or a blocked injector, or something more serious.

Call your dealer, who will likely suggest that you bring or more likely tow the car to them.

The dealer can scan the ECU for a fault code which will point to an accurate diagnosis.

try this, do not drive car just sit and let it idle. raise rpms up a bit to around 2000 rpms. if it studders its more likely the engine misfire. if its not that .its a possibility that you have a loose or bad wheel bearing in front. also check for a blister or bump one one of the front tires.

I would first check the u-joints on the driveshaft if the problem only happens when the speed is between 62-75mph. Then check all the tires for lumps or bulgesin the sidewall or tread surface. The tires may also be out of balance and bouncing at that speed. If the vibration occurs only when the engine is around 2000rpm, check the pulleys, serpentine belt and anything driven by it for looseness. Also, check the trans mount to see if it is loose or broken. If everything checks out ok, have the OBD codes checked to see if anything might be causing the engine to surge.

check your engine support, if it is ok check your tie rods and stabilizers or might as well have your wheels aligned...

bad engine mount make car shake.cylinder misfire make engine shake.

Check the motor mounts. They might be worn or loose which can cause vibration felt when the engine is reved up or running at higher rpms than at idle.