2003 BMW Z4 transmission fastener tightening specifications

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Condition	Value

expand_moreAxle drive


Propeller shaft intermediate bearing	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_morePropeller shaft


M10 screws (class 10.9)	47.2 lbf⋅ft47.2 lbf⋅ft64 N⋅m

expand_moreM10 ZNS screws (class 10.9)


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Second stage	90°90°90°

expand_moreM10 ribbed ZNS screws (class 10.9)


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Second stage	45°45°45°


M10 screws (class 8.8)	35.4 lbf⋅ft35.4 lbf⋅ft48 N⋅m
M12 screws (class 10.9)	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m

expand_moreZNS screws (M12, class 10.9)


First stage	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Second stage	90°90°90°

expand_moreRear axle drive shaft


M10	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace screws.
M10 screws (class 10.9)	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Replace screws.

expand_moreM24


Central nuts	184.39 lbf⋅ft184.39 lbf⋅ft250 N⋅m
Replace the nut and lightly oil the contact surfaces.

expand_moreM27


Central nuts	221.27 lbf⋅ft221.27 lbf⋅ft300 N⋅m
Replace the nut and lightly oil the contact surfaces.


M8 × 40 screws	38.35 lbf⋅ft38.35 lbf⋅ft52 N⋅m
Replace screws.

expand_moreClutch

expand_moreClutch master cylinder


At the bearing pedestal	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreClutch pressure plate

expand_moreBMW gasoline straight-6 2.2 L M54 B22 (226S1) 168 HP

expand_moreClass 10.9


M8	25.08 lbf⋅ft25.08 lbf⋅ft34 N⋅m
Use new screws.

expand_moreClass 8.8 screws


M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Use new screws.

expand_moreAll other modifications

expand_moreExpanding-shaft (M8 screws, class 10.9)


First stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Second stage	85–95°85–95°85–95°

expand_moreClass 10.9


M8	25.08 lbf⋅ft25.08 lbf⋅ft34 N⋅m
Use new screws.

expand_moreClass 8.8 screws


M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Use new screws.


Clutch slave cylinder	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreDifferential

expand_moreRear axle differential

expand_moreAll other modifications

expand_moreAt the axle support


Front	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Rear	121.7 lbf⋅ft121.7 lbf⋅ft165 N⋅m

expand_moreGearbox lubrication

expand_moreGearbox oil drain plug

expand_moreBMW gasoline straight-6 2.2 L M54 B22 (226S1) 168 HP

expand_moreWith 5-speed gearbox


S5D 250G gearbox	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreBMW gasoline straight-6 2.5 L M54 B25 (256S5) 189 HP

expand_moreWith 5-speed gearbox


S5D 250G gearbox	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreGS6-17BG and GS6-17DG 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreGS6-37DZ and GS6-37BZ 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreBMW gasoline straight-6 3.0 L M54 B30 (306S3) 228 HP

expand_moreGS6-37DZ and GS6-37BZ 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreAll other modifications

expand_moreGS6-17BG and GS6-17DG 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreGearbox oil filler plug

expand_moreBMW gasoline straight-6 2.2 L M54 B22 (226S1) 168 HP

expand_moreWith 5-speed gearbox


S5D 250G gearbox	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreBMW gasoline straight-6 2.5 L M54 B25 (256S5) 189 HP

expand_moreGS6-17BG and GS6-17DG 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreGS6-37DZ and GS6-37BZ 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreBMW gasoline straight-6 3.0 L M54 B30 (306S3) 228 HP

expand_moreGS6-37DZ and GS6-37BZ 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll other modifications

expand_moreGS6-17BG and GS6-17DG 6-speed gearboxes


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M18 × 1,5 screws	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreGearbox mounting

expand_moreGearbox cross support

expand_moreOn chassis


M8	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreGearbox mounting

expand_moreAt the gearbox


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 BMW Z4 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and BMW warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

Engine Fastener Tightening Specifications
Front Suspension Fastener Tightening Specifications
Rear Suspension Fastener Tightening Specifications
Transmission Fastener Tightening Specifications

Service Intervals

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow BMW Z4 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2003 BMW Z4 you're not only saving money, but also also improving your technical skills and learning something new.

2003 BMW Z4 First generation Transmission Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

BMW Z4 First generation model years

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