BMW 730 2020
Analysis of 71 active listings for BMW 730 2020 from mobile.bg, cars.bg and other sources. Real market prices, known engine issues and what to check before buying.
Diesel 70Hybrid 1Petrol 1
📊 Market data
- Cheap listings34 900 €
- Typical price44 950 €
- Expensive listings53 499 €
- Average mileage144 060 км
⚙️ Engines — what to expect
BMW B57 3.0 quad-turbo diesel — B57
Known issues
- EGR cooler can leak coolant into exhaust — white smoke. Can also contaminate oil. (~500–1 500 € repair)
- Complex exhaust aftertreatment — AdBlue injection can clog or fail. SCR catalyst expensive. (~400–2 000 € repair)
- B57D30S0 (quad-turbo) has 4 turbos — any failure is expensive and complex. Parts supply limited. (~2 000–6 000 € repair)
- Injectors can develop leak-back at higher mileage, causing hard starts. (~600–1 500 € repair)
- Turbo oil feed lines can coke with long oil intervals, accelerating turbo wear. (~400–1 200 € repair)
🚨 What to check before buying
Overall risk score: 10/10
Serious risks
- EGR cooler failure: EGR cooler can leak coolant into exhaust — white smoke. Can also contaminate oil.
- DPF/SCR system issues: Complex exhaust aftertreatment — AdBlue injection can clog or fail. SCR catalyst expensive.
- Quad-turbo system failure: B57D30S0 (quad-turbo) has 4 turbos — any failure is expensive and complex. Parts supply limited.
- Turbo oil feed coking: Turbo oil feed lines can coke with long oil intervals, accelerating turbo wear.
Additional notes
- BMW X5 diesel is the top luxury SUV in Bulgaria (1700+ listings). At 200k+ km: timing chain, DPF, turbo, swirl flaps, transfer case, and air suspension (if equipped) are all potential failure points.
- Diesel car from before 2018 with very low mileage suggests city-only use — DPF is likely clogged or has been removed (illegal). Check DPF status and EGR condition.
- BMW 730d (150+119 listings, avg 155-177k km, €35-37k) — flagship technology depreciates but repair costs don't. Air suspension (€2000+/corner), laser headlights (€3000+/unit), gesture control failures, ZF 8HP at high mileage. B57 engine is reliable but service intervals are expensive. Annual maintenance €3000-5000.
- BMW X6 diesel (199+154 listings, avg 148-176k km, €36-39k) — bought for image, expensive to maintain. Coupe-SUV body means unique (expensive) rear glass and body panels. N57/B57 3.0d is reliable but: transfer case service €1000+, adaptive dampers €2000+ per pair, 21-inch+ tires €1500+/set.
🔥 Current market offers
5 cheapest active listings for BMW 730 2020. Click "Analyze" for a full report with market valuation, risk analysis and photo analysis.
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