P0456 on Your 2024 X3: New Generation Case
Your 2024 X3 (G45—all-new generation) has flagged P0456—a very small EVAP leak. The B48 2.0L turbo (xDrive30i) or B58 3.0L turbo (M40i) uses BMW's DMTL (Diagnosis Module Tank Leakage) pump. First year of the new generation—fully covered under BMW's 4yr/50k warranty through 2028.
Clues
- Check engine light on
- P0456 stored
- No drivability issues
- Fuel filler may have debris
Suspects
- Fuel Filler Seal (High Likelihood): Debris in capless filler. $0 warranty.
- DMTL Pump (High Likelihood): First-year component. $0 warranty.
- Purge Valve (Medium Likelihood): Manufacturing variance. $0 warranty.
- Software Calibration (Low Likelihood): New platform DMTL sensitivity. $0 warranty update.
What to Do
- Clean fuel filler area
- BMW dealer appointment—covered through 2028
- Free warranty repair via ISTA diagnostics
Cost
- Under warranty: $0
- 4yr/50k through 2028
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the turbo, xDrive AWD, or any system.
Warranty
BMW's 4yr/50k through 2028. Federal emissions 8yr/80k through 2032. First-year G45—dealer may have calibration updates.