O2 sensor help? 535i

[InfernoM3]

Have you looked into the online spare parts catalog ETK?
Oxygensensors.com send it usually out with plastic clips like this

Those look like zip ties. The clip I was talking about looks different. I'll try and get a pic later. But I have another issue now. Well I test drove the car this morning and it drove better. acceleration was better and it seemed to not lag as much. however the exhaust smelled a little more. is this normal. Also the check engine light flashed a few times when I would try to accerelate to around 3-4K RPM??? The car doesn't seem to want to rev past this area. Did I do something wrong or is the 02 sensor defective. All i did was remove old 02 sensor and replace with new 02 sensor?