
BMW 135i, 335i, X3, X5, & More (N54 & N55) Intake Valve Walnut Blasting Vacuum Attachment - Product Review
The BMW N54 engine is one of BMW's most popular engines they ever produced. However, like all direct-injected engines, it has one major flaw—and that's intake valve carbon buildup. You could go to the dealer and pay over $700 to have your intake valves cleaned, or you can do it yourself for a...