Cracking the P0440 Code on Your 2022 BMW 5 Series
A P0440 on your 2022 BMW 5 Series (G30) signals an EVAP system malfunction. The 530i uses a 2.0L B48 turbo (248 hp) and the 540i a 3.0L B58 inline-six (335 hp). BMW's EVAP system with its leak diagnosis module has some known weak points. Let's investigate.
Symptoms
- Check engine light on
- Faint fuel odor
- Slight MPG decrease
- Fueling difficulties
- Emissions test failure
Your 5 Series drives normally. Performance and xDrive are unaffected.
Most Likely Causes
- Gas Cap — Worn or loose. Estimated repair: $5–$30.
- Leak Diagnosis Module (LDM) — BMW's EVAP pump. Known failure point. Estimated repair: $145–$350.
- Purge Valve (N80) — Can stick or fail electrically. Estimated repair: $100–$250.
- Fuel Tank Vent Valve — Controls EVAP venting. Estimated repair: $105–$275.
- Vapor Line Deterioration — Lines can develop small cracks. Estimated repair: $55–$165.
Diagnostic Steps
- Check gas cap, clear code, drive 50+ miles
- Scan with BMW ISTA or BimmerLink
- Test LDM pump and N80 valve
- Smoke test the system
- Check for G30-specific TSBs
Repair Costs
- Gas cap: $5–$30
- LDM: $145–$350
- N80 valve: $100–$250
- Vent valve: $105–$275
- Vapor line: $55–$165
- Diagnostic: $100–$175
Warranty: Check your mileage — BMW's 4-year/50,000-mile warranty may still cover the repair.
Can I Drive With P0440?
Yes. No performance or safety concerns.
DIY Feasibility
The G30's LDM is accessible near the fuel tank. The N80 valve is in the engine bay. BMW-specific scan tools are recommended. Independent BMW shops typically charge 30-40% less than dealers.