BMW Z4 2020
Analysis of 66 active listings for BMW Z4 2020 from mobile.bg, cars.bg and other sources. Real market prices, known engine issues and what to check before buying.
Petrol 66
📊 Market data
- Cheap listings31 945 €
- Typical price38 450 €
- Expensive listings45 974 €
- Average mileage55 202 км
⚙️ Engines — what to expect
BMW B-series petrol — B48
Known issues
- Some early units consume oil above normal. Check oil level regularly. (~100–2 000 € repair)
- Direct injection causes carbon deposits on intake valves. Walnut blasting may be needed. (~250–600 € repair)
- Coolant reservoir or thermostat housing can develop micro-cracks. (~200–600 € repair)
- HPFP can wear over time, causing rough running or hard starts. (~500–1 200 € repair)
BMW B58 inline-6 turbo petrol — B58
Known issues
- Very early B58 (2015-2017) had reports of coolant loss. Mostly resolved in later production. (~200–800 € repair)
- PCV diaphragm can harden, causing oil consumption and idle issues. (~200–600 € repair)
BMW N52 inline-6 NA petrol — N52
Known issues
- VANOS system components wear — rough idle, rattling on cold start, reduced power. Rebuild kits available for €200-500. (~200–600 € repair)
- Very common leak point. Oil drips onto alternator bracket. Easy to fix but messy if ignored. (~100–300 € repair)
- Electric water pump can fail without warning — leads to overheating. Replace preventatively around 80-100k km. (~300–600 € repair)
- Valve cover gasket hardens and leaks. Common age-related issue. (~150–400 € repair)
🚨 What to check before buying
Overall risk score: 6/10
Serious risks
- GDI intake valve deposits: Direct injection causes carbon deposits on intake valves. Walnut blasting may be needed.
Additional notes
- BMW N54 3.0 twin-turbo (335i, 535i, Z4 35i): legendary performance but known for: (1) Waste gate rattle — turbo actuators wear, causing rattling. BMW dealer fix is twin turbo replacement at €3,000-5,000. (2) High-pressure fuel pump failure — sudden loss of power. €500-1,000. (3) Fuel injector failure — coking and cracking. €200-400 each, 6 total. (4) Water pump/thermostat electronic failure — €400-800. The N55 single-turbo successor is more reliable.
🔥 Current market offers
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