This is all a direct swap into M54-powered cars. For N52 cars (3.0si), you may be able to use a LUK LF30 power steering pump from an E90 with an E36/E46 steering rack and ATF fluid. The LUK LF30 was used in some early E46s with ATF, and in E9X models with CHF11S.Parts you will need:
Steering Column/Shaft:
Z4 M Intermediate shaft
Part #32307836809 (LHD)
Part #32307836811 (RHD)
You will need this piece to connect the steering rack pinion to the steering column. The Z4 M one is meant to connect to the hydraulic rack pinions. The standard Z4 intermediate shaft will not fit onto the hydraulic steering rack. You'll save a lot of money buying it used.
Z4 M steering column
Part #32307841203 (LHD)
Part #32307841204 (RHD)
Not required but preferable. Also much cheaper to buy used. The Z4 M steering column doesn't have the electric-assist drive built into it.
Rack and Pump:
Z3/E36/E46/Z4 M steering rack
I used an E46 3-series steering rack because it is the most easily-available.
LUK LF20 power steering pump (M54 Engine)
Part #32416760034
Buy a used or aftermarket one unless you have a thick wallet.
LUK LF30 power steering pump (N52 Engine)
Part #32416769887
Hoses/Lines:
High-pressure line from pump to rack (LHD, M54 engine)
Part #32416774215
High-pressure line from pump to rack (LHD, N52 engine)
Part #32416764725
Power steering cooler loop
Part #17111436262
You will most likely need to use an aftermarket cooler with AN fittings due to fitment issues with the E46 cooler loop in the Z4.
Line from reservoir to pump
Part #32416750155
Cooler return line
Part #32416796390
Fluid Reservoir and Bracket:
Fluid reservoir
Part #32416851217
Reservoir mounting bracket (M54 and N52)
Part #32411128333
Mounting bracket (additional, needed for N52 along with the above one)
Part #32416768096
Last edited by VladBelsky; 01-01-2019 at 06:56 PM.
04R 3l 6 sp VF SC, custom ducting, alphaN, 2.62 pulley, multiport WMI,Severn Tuning(Pokeybritches), Tial BPV,Ceramic header, magnaflow section 1, SS race muffler/y-pipe, megan mounts,42 design catch can, CDV delete ,custom strut bar,3.91 LSD, H&R bars, Hotchkis links.Eibach Pro Kit,Koni Yellows.Megan camber arms. Carbon interior,SSK,UUC lines.CF aero. Poly bushings.
Why
04R 3l 6 sp VF SC, custom ducting, alphaN, 2.62 pulley, multiport WMI,Severn Tuning(Pokeybritches), Tial BPV,Ceramic header, magnaflow section 1, SS race muffler/y-pipe, megan mounts,42 design catch can, CDV delete ,custom strut bar,3.91 LSD, H&R bars, Hotchkis links.Eibach Pro Kit,Koni Yellows.Megan camber arms. Carbon interior,SSK,UUC lines.CF aero. Poly bushings.
Is far as failure we have never had to replace an electric steering rack and I have been involved with BMW's for about 15 years. It just seems like lot of money and time for this mod
I did this conversion and I love it.....
Anyone offer this service near southern california. Miss the feel of my E46 steering.
Absolutely nothing....
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Ohhh... and there is a method pioneered by the Germans which involves adjusting the ..lash.. I think it is. While I haven’t done it, it’s actually a relatively very simple procedure. There are posts on this... costs absolutely nothing (cost of hex wrench) and does not involve removing steering column to do so.
So... no failure of EPS IN Z4’s (sticky steering is very annoying I grant you... I have it)
And... no wasting of your time and money doing a very invasive procedure.
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If EPS is so great why doesn't the M version have it?
The list look fairly complete. BUT do you have to re-code the car for the change?
Hey!
I have a question, maybe you could help me, do you know if there is any difference between these two?
Steering Column/Shaft:
Z4 M Intermediate shaft
Part #32307836809 (LHD)
Part #32307836811 (RHD)
I have a LHD car and I got hold of a RHD part, I couldn't find any picture in which these 2 are different, nor any reason or schematic for which they should be different.
Thanks a lot for your input! If all goes well, hydraulic steering will be up and running this summer.
So what did this cost to purchase all the parts?
For sh$ts n giggle$ I threw the part numbers into ECS. When there were options for parts, I went mid range for parts costing over $100 , parts under $100 I went OEM BMW.
This includes a brand new OEM column.
Parts cost was $2,400
04R 3l 6 sp VF SC, custom ducting, alphaN, 2.62 pulley, multiport WMI,Severn Tuning(Pokeybritches), Tial BPV,Ceramic header, magnaflow section 1, SS race muffler/y-pipe, megan mounts,42 design catch can, CDV delete ,custom strut bar,3.91 LSD, H&R bars, Hotchkis links.Eibach Pro Kit,Koni Yellows.Megan camber arms. Carbon interior,SSK,UUC lines.CF aero. Poly bushings.
I wonder how many of those parts interchange with an E46 and could be easily and cheaply obtained at a junkyard these days? Most of them sans the steering linkage itself, I'd wager
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