2025 BMW i3 engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreAuxiliary assemblies

expand_moreAir-conditioning compressor


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAir-conditioning compressor pressure line


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Replace screws.

expand_moreVacuum pump


At the bracket	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreCooling system

expand_moreCoolant pump


M10	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace sealing rings.
M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace sealing rings.

expand_moreCylinder head

expand_moreCamshaft bearing


M6 × 35 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Insert the screws dry.

expand_moreCylinder head screws

expand_moreNuts 1 – 6 (M10)

Figure 1. Cylinder head, Cylinder head screws, Nuts 1 – 6 (M10).


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace nuts. See figure 1.
Second stage	90°90°90°
Third stage	90°90°90°

expand_moreScrew 7 (M6)


Fourth stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.

expand_moreValve cover


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Tighten new screws crosswise in outside-to-inside order.

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreM8


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace, wash and lightly lubricate the screws.
Second stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Third stage	90°90°90°

expand_moreCrank case bottom half


M8	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreMain bearing

expand_moreM6


Second stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Replace screws.
Fourth stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreM9

Figure 2. Engine block, Main bearing, M9.


First stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Replace screws. See figure 2.
Third stage	13.28 lbf⋅ft13.28 lbf⋅ft18 N⋅m
Fifth stage	90°90°90°

expand_moreEngine control

expand_moreControl drive chain guide rail


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreControl drive chain tensioner


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace sealing rings.


Control drive chain tensioning rail	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreTiming case cover


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine lubrication

expand_moreOil cooler


Cap	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Lubricate the sealing rings.
On the engine block	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Lubricate the sealing rings.


Oil filter	8.11 lbf⋅ft8.11 lbf⋅ft11 N⋅m

expand_moreOil pressure sensor


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Second stage	22°22°22°

expand_moreOil pump


M6 × 30 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreOil sump


M6 × 25 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine management


Camshaft sensor	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Crankshaft sensor	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Knock sensor	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m
Lambda sensor	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreEngine mounting

expand_moreEngine bracket

expand_moreOn engine


M10	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m

expand_moreOn engine mounting


M12	70.81 lbf⋅ft70.81 lbf⋅ft96 N⋅m
Replace screws.

expand_moreSubframe

expand_moreM12 × 60 screws


Center	76.71 lbf⋅ft76.71 lbf⋅ft104 N⋅m
Replace screws.

expand_moreM12 × 98 screws at the front


First stage	70.81 lbf⋅ft70.81 lbf⋅ft96 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreRear


M12 × 98 screws	76.71 lbf⋅ft76.71 lbf⋅ft104 N⋅m
Replace screws.

expand_moreTorque arm


M12	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m

expand_moreExhaust system

expand_moreCatalytic converter


On exhaust manifold	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Replace clamps.

expand_moreCatalytic converter bracket

expand_moreAt the gearbox


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreExhaust manifold


M8	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace sealing rings.

expand_moreExhaust pipe


On catalytic converter	24.34 lbf⋅ft24.34 lbf⋅ft33 N⋅m
Replace clamps.

expand_moreIgnition system


Spark plugs	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2025 BMW i3 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

Chassis and Body Fastener Tightening Specifications
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 i3 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 2025 BMW i3 you're not only saving money, but also also improving your technical skills and learning something new.

2025 BMW i3 First generation LCI i3s Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

BMW i3 First generation LCI i3s model years

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