In this video I show you how to service an automatic transmission in your E90 BMW. I'm working on my 2008 335i with an N54 motor.
This car has the 6HP21 transmission which also goes by 6HP19 or 6HP19TU. This is a 6 speed ZF transmission.
I show you how to change out the bridge seal and all the tube seals along with the solenoids which do go bad over time.
In my case I was getting a rough downshift to first gear. The likely culprit was the bridge seal.
Link to a thread showing how to setup INPA/NCS Expert:
https://www.e90post.com/forums/showthread.php?t=918608
If you have Windows 10 64-Bit:
https://www.e90post.com/forums/showthread.php?t=1196830
You can find the INPA cable online at places such as Amazon or Ebay. Search INPA Cable K+D Can.
The pars and where I purchased them:
Solenoids
https://www.fcpeuro.com/products/auto-trans-oil-pump-pressure-regulator-valve-106829804601
Bridge Seal
https://www.fcpeuro.com/products/7-7-auto-trans-valve-body-sealing-sleeve-24347588724
Tube Seal Long (Quantity 1)
https://www.fcpeuro.com/products/6-25-auto-trans-valve-body-sealing-sleeve-24107536341
Tube Seal Medium (Quantity 1)
https://www.fcpeuro.com/products/5-93-auto-trans-valve-body-sealing-sleeve-24107536340
Tube Seal Short (Quantity 2)
https://www.fcpeuro.com/products/4-51-auto-trans-valve-body-sealing-sleeve-24107536339
Transmission Pan
https://www.fcpeuro.com/products/bmw-auto-trans-filter-ga6hp19z-24152333907
Mechatronic Sleeve
https://www.fcpeuro.com/products/bmw-auto-trans-valve-body-sealing-sleeve-050121627201
Foam Strip (Recommended but not shown in this video)
https://www.ebay.com/itm/ZF-New-Solenoid-Protection-Foam-Strip-7-solenoids/263986836922?epid=2106036112&hash=item3d76d775ba:g:ZHsAAOSwS3Za5KcC:rk:1:pf:0 When you see the word "affiliate" listed beside any link in my description please know that this is a custom link and I will earn a small commission if you opt to purchase using said link. This is at no extra cost to you so it's a win all around :) Thank you!