[youtube]bV3USW19GB4[/youtube]
https://youtu.be/bV3USW19GB4
Download from net.(Not BMW Motor)
It is a little hard for my z4 to cross 1800 RPM in city driving. It was always keeping gasping in 1800 RPM for a time before it went to 2100 RPM and then engine and exhaust noise will sounds better.
I bought a catalytic system cleaner tool(10 £) .
After that all things has improved significantly
https://youtu.be/bV3USW19GB4
Download from net.(Not BMW Motor)
It is a little hard for my z4 to cross 1800 RPM in city driving. It was always keeping gasping in 1800 RPM for a time before it went to 2100 RPM and then engine and exhaust noise will sounds better.
I bought a catalytic system cleaner tool(10 £) .
After that all things has improved significantly