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I have the standard suspension, or maybe the M one (non adaptive) , have to check it, but, As the front ones are leaking, shall I replace all 4?
At BMW service, they said they still work like 70% and is not necessary to replace them, but other service told me that the front ones are leaking and should be replaced.
Shall I just replace all 4 considering my Z4 has 150k km...?
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