E82 Rear Arm Change

[jwhat]

Had the car in for a brake fluid change today and it was mentioned that the top straight wishbone was worn and needs replacing.
Part number is 33326777980
Does anyone know if it's a diy job?
BMW don't sell the bushes separately, should I get the arm polybushed instead?
Would I need an alignment afterwards?
It's number 18 here.

[Valdelisbmw]

number 18 ,number 19, and number 3 are very common on 1 and 3 serries cars .u need to chech all suspension very carefully . these parts wear down in very same or close time .and of course tracking must be done after these parts there replaced .

i wouldnt go for power flex bushes

[jwhat]

Edit: Thank you very much Valdelis, I only saw your reply after I posted.
I'll get them all checked out so, I'll stear clear of powerflex I think.

So I think these would probably be replacement bushes from powerflex

http://www.powerflex.co.uk/road-series/product-details/Rear+Upper+Control+Arm+To+Chassis+Bush/1882.html


and

http://www.powerflex.co.uk/road-series/product-details/Rear+Upper+Control+Arm+To+Hub+Bush/1883.html


or these would supposedly fit as an upgrade

http://www.ecstuning.com/BMW-E82-128i-N52_3.0L/Suspension/Control_Arm/ES2622633/