have verified why the XI lowering perches will not work. It all comes down to the strut tophat . Its a different piece than what comes on the any I suspension setup . If you buy a different mounting tophat for any other 3 series than a XI version it will work . SO to use the lowering perches you just need to purchase the I suspension Tophat and it should work unless they actually changed the mounting holes on the actual car well it will never work unless each pice is heavily modified . realoem has them for $65 each side
ALL I series cars
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All XI series cars
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This is where these can bought for cheaper than dealer
Lemfoerder Strut Mount - Front
Your Price: $32.85
Part Number: W0133-1779570
Notes: w/ Sport Suspension Packages or Poor Road Package
Position: Front
Condition: New
This Product Fits the Following: Warehouse: A
Vehicle Body
• 2009 BMW 328i Sedan
• 2009 BMW 328i Wagon