The P0304 code in your 2022 BMW 5 Series indicates the powertrain control module has detected persistent misfires in cylinder 4. Understanding the G30 generation's turbocharged engines enables targeted diagnosis for restoring this executive sedan's refined performance.
Understanding P0304 in the 2022 5 Series (G30)
The 2022 5 Series G30 LCI offers the B48 2.0L turbo four-cylinder (530i), B58 3.0L turbo inline-six (540i), and hybrid variants. For the four-cylinder, cylinder 4 is rearmost. For the six-cylinder, it's fourth from the front. Both engines use BMW's direct injection and turbocharging technology.
Executive Sedan Considerations
The 5 Series demands smooth, refined operation befitting its executive status. Turbocharged engines face elevated ignition demands. Direct injection contributes to carbon accumulation over time. Quality ignition components ensure the refined character expected from this premium sedan.
Diagnostic Process
Identify your engine—B48 I4 or B58 I6. Use BMW-compatible diagnostics for full code and freeze frame data. Locate cylinder 4 based on your configuration. Test ignition coil output and spark plug condition. Consider carbon buildup for higher-mileage vehicles showing related symptoms.
Repair Implementation
Install BMW-approved spark plugs designed for turbocharged applications. Replace ignition coils showing degraded output. Address carbon accumulation through professional cleaning. The 5 Series' refined character requires quality repairs.