BMW 520 2009
Analysis of 96 active listings for BMW 520 2009 from mobile.bg, cars.bg and other sources. Real market prices, known engine issues and what to check before buying.
Diesel 86Petrol 6
📊 Market data
- Cheap listings3 259 €
- Typical price5 500 €
- Expensive listings7 078 €
- Average mileage257 485 км
⚙️ Engines — what to expect
BMW N-series diesel — N47
Known issues
- Chain mounted at rear stretches over time. Can skip teeth or snap, destroying the engine. Rattling noise on cold start is the warning sign. (~2 500–5 000 € repair)
- Exhaust gas recirculation valve clogs, especially with city driving. Causes loss of power and check engine light. (~300–700 € repair)
- EGR cooler can crack internally, causing coolant loss and white smoke. Common on high-mileage units. (~500–1 200 € repair)
- Intake swirl flaps can break and get ingested into engine. Many owners delete them preventatively. (~200–1 500 € repair)
- Diesel particulate filter clogs with short city trips. Requires forced regeneration or replacement. (~400–1 200 € repair)
🚨 What to check before buying
Overall risk score: 10/10
Serious risks
- Timing chain failure: Chain mounted at rear stretches over time. Can skip teeth or snap, destroying the engine. Rattling noise on cold start is the warning sign.
- EGR valve failure: Exhaust gas recirculation valve clogs, especially with city driving. Causes loss of power and check engine light.
- EGR cooler leak: EGR cooler can crack internally, causing coolant loss and white smoke. Common on high-mileage units.
- Swirl flap failure: Intake swirl flaps can break and get ingested into engine. Many owners delete them preventatively.
- DPF clogging: Diesel particulate filter clogs with short city trips. Requires forced regeneration or replacement.
- Turbo actuator failure: Electronic turbo actuator fails, causing limp mode.
Additional notes
- N47 engine has known reliability problems — assess carefully
- TIMING CHAIN WARNING: N47 has a problematic timing chain design. Get it checked before buying.
- CRITICAL: BMW N47 diesel with 150k+ km has very high risk of timing chain failure. This is the #1 dangerous engine on the used market. Budget €3,000-5,000 for potential chain replacement, or get a pre-purchase timing chain stretch test.
- BMW N47 diesel has timing chain at the rear of the engine. This is a fundamentally flawed design. Even at lower mileage, budget for potential timing chain work. Get a pre-purchase inspection with timing chain stretch measurement.
🔥 Current market offers
5 cheapest active listings for BMW 520 2009. Click "Analyze" for a full report with market valuation, risk analysis and photo analysis.
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