Investigating P0440 on Your 2024 BMW X5
Your 2024 BMW X5 (G05 LCI) has triggered a P0440 code — an EVAP system malfunction. The X5 offers the xDrive40i (3.0L B58 inline-six, 375 hp) or the xDrive50e plug-in hybrid. The gasoline-powered models use BMW's EVAP system with the leak diagnosis module. As a new vehicle under warranty, this should be straightforward. Let's examine the evidence.
Symptoms to Watch For
- Check engine light illuminated
- Faint gasoline odor
- Slight fuel economy decrease
- Fuel nozzle clicking off early
- Failed emissions inspection
Your X5 drives perfectly normally. The inline-six, 8-speed, xDrive, and air suspension are unaffected.
Top Suspects: Ranked by Likelihood
- Gas Cap/Fuel Filler — Check the filler system first. Estimated repair: $0–$35.
- Leak Diagnosis Module (LDM) — BMW's EVAP pressure pump. Defect possible. Estimated repair: $160–$390 (warranty-covered).
- Purge Valve (N80) — Controls vapor flow to the inline-six intake. Estimated repair: $115–$280 (warranty-covered).
- Fuel Tank Vent Valve — Controls system venting. Estimated repair: $120–$310 (warranty-covered).
- EVAP Connection — Loose factory fitting. Estimated repair: $0–$130 (warranty).
Diagnostic Steps
- Check fuel filler, clear code, drive 50+ miles
- Schedule BMW dealer appointment — warranty applies
- Dealer will use ISTA for EVAP diagnostics
- Check for TSBs on the G05 X5
Repair Cost Breakdown
- Gas cap/filler: $0–$35
- LDM: $160–$390 (warranty)
- N80 purge valve: $115–$280 (warranty)
- Vent valve: $120–$310 (warranty)
- EVAP connection: $0–$130 (warranty)
Warranty: Your 2024 X5 is covered by BMW's 4-year/50,000-mile warranty. All EVAP repairs are free at the dealer.
Can I Drive With P0440?
Yes. P0440 is emissions-only. Your X5 is fully functional.
DIY or Dealer?
Dealer — BMW's warranty covers the repair at no cost.