The executive saloon benchmark, now surprisingly affordable used
BMW's 5 Series has defined the executive saloon class since 1972, spanning seven generations. UK used prices range from £3,000 for high-mileage E60s to £35,000+ for recent G30 models. The 520d dominates UK sales and delivers 55+ mpg, though pre-2015 models may fall foul of ULEZ. Budget £800-£1,200 annually for maintenance with independent specialists — roughly half BMW dealer rates.
We track 23 known issues across the BMW 5 Series range, including 7 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a BMW 5 Series? Enter the reg to see which of our 23 known issues apply to that exact car, plus full MOT history and mileage checks.
E39 (1995–2004) — Petrol options included the 2.2i, 2.5i, 2.8i, M5 V8, 3.5i, with 2.5d, 3.0d on the diesel side. Our database flags 7 known issues on this generation, 1 of which are rated as safety-critical. The most significant concern is Swirl flap failure (engine destroyer) (£400–£800 to address).
E60 (2003–2010) — Petrol options included the 530i, 535i Twin Turbo, M5 V10, with 520d, 530d on the diesel side. Our database flags 7 known issues on this generation, 2 of which are rated as safety-critical. The most significant concern is Rod bearing failure (engine destroyer).
F10 (2010–2017) — Petrol options included the 520i Turbo, 528i, 535i, M5 V8, with 520d, 530d/535d on the diesel side. Our database flags 7 known issues on this generation, 3 of which are rated as safety-critical. The most significant concern is Timing chain failure (£2,000–£3,000 to address).
G30 (2017–2023) — Petrol options included the 520i, 530i/540i, M5 Competition, with 520d, 530d/540d on the diesel side. Our database flags 5 known issues on this generation, 1 of which are rated as safety-critical. The most significant concern is EGR cooler failure and AdBlue system issues (£300–£1,200 to address).
The S85 5.0-litre V10 engine suffers from premature rod bearing failure, typically between 30,000-80,000 miles. The bearing clearances are tight and highly sensitive to oil viscosity and service intervals. When bearings fail, metal debris circulates through the oil system destroying the entire engine beyond economical repair. This is the single most catastrophic and expensive failure mode on the E60 M5, with total rebuild costs routinely exceeding the vehicle's market value.
Complete bearing failure destroys the engine requiring a full rebuild costing £8,000-£15,000 or replacement with a used/remanufactured unit. Metal debris contaminates the oil system requiring complete system flushing. The vehicle is unsafe to drive once bearing knock is present as catastrophic failure can occur without warning.
Listen for any unusual knocking, tapping or rattling from the engine at idle and under load. Check the oil for metal particles or discolouration. On higher-mileage examples, a professional compression test can reveal internal wear before it becomes critical.
The N47 diesel engine has a rear-mounted timing chain that is prone to stretching and complete failure, typically between 40,000-100,000 miles. Unlike front-mounted chains, the N47 chain requires complete engine removal for replacement, making this one of the most expensive non-catastrophic failures possible. Chain failure results in valve damage as this is an interference engine. The issue affects all N47 variants and is considered the primary reliability concern for F10 520d models.
Complete chain failure destroys valves and potentially pistons requiring engine rebuild or replacement. Replacement costs £2,000-£4,000 due to engine removal requirement. Chain stretch before failure causes progressive power loss and increased fuel consumption. Vehicle should not be driven if chain rattling is heard.
Listen for any unusual knocking, tapping or rattling from the engine at idle and under load. Check the oil for metal particles or discolouration. On higher-mileage examples, a professional compression test can reveal internal wear before it becomes critical.
The N20 four-cylinder turbo engine suffers from timing chain guide disintegration, typically between 40,000-100,000 miles. The plastic chain guides break apart allowing the chain to jump timing or snap completely. This is considered the most serious reliability issue on N20-powered F10 models including 520i and 528i variants. When the guides fail, metal and plastic debris circulates through the oil system potentially causing secondary damage to oil pumps and bearings.
Guide failure allows timing chain to jump or break causing valve damage on this interference engine. Repair requires engine disassembly costing £1,500-£3,500. Plastic debris can damage oil system components. Vehicle should not be driven if chain rattling is present due to risk of catastrophic failure.
Listen for any unusual knocking, tapping or rattling from the engine at idle and under load. Check the oil for metal particles or discolouration. On higher-mileage examples, a professional compression test can reveal internal wear before it becomes critical.
The M57 diesel engine has plastic swirl flaps in the intake manifold that can break off and be ingested by the engine, causing catastrophic internal damage. The flaps are designed to improve combustion at low RPM but the plastic becomes brittle with age and heat cycling. When a flap breaks free, it can damage pistons, valves, and cylinder walls requiring complete engine rebuild. Many specialist BMW technicians recommend prophylactic swirl flap removal to prevent this failure mode.
If a swirl flap breaks off and is ingested, it can cause catastrophic engine damage requiring complete rebuild costing £4,000-£8,000. Many owners elect for preventative removal costing £400-£800. Removal may slightly affect idle quality but eliminates the failure risk entirely. Driving with damaged flaps is extremely dangerous.
Check for any engine warning lights on the dashboard. Ask about the car's MOT emissions history — repeated failures suggest underlying issues. A pre-purchase diagnostic scan is especially worthwhile to check for stored emissions fault codes.
E60 M57 engines retain the catastrophic swirl flap failure risk from E39 generation, with the added complexity of DPF systems that clog on cars used for short journeys. The swirl flaps can still break off and destroy the engine, while DPF blockages cause power loss, warning lights, and expensive regeneration procedures. Cars driven predominantly in town or for short distances are particularly susceptible to DPF issues requiring expensive cleaning or replacement.
Swirl flap ingestion destroys the engine requiring rebuild costing £4,000-£8,000. DPF replacement costs £1,500-£3,000 while professional cleaning costs £300-£600. Blocked DPF can cause complete loss of power and expensive forced regeneration procedures. Both issues make the vehicle unsafe or undriveable.
Check for any engine warning lights on the dashboard. Ask about the car's MOT emissions history — repeated failures suggest underlying issues. A pre-purchase diagnostic scan is especially worthwhile to check for stored emissions fault codes.
For the full breakdown of all 23 tracked issues with repair costs, see the BMW 5 Series common problems page.
Based on 387k real DVSA MOT tests, the BMW 5 Series fails more often than average on several items. The biggest outlier is transmission shaft flexible coupling deteriorated at 86x the fleet average, followed by any fracture or welding defect on a wheel (75x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full BMW 5 Series MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 10k miles) typically costs £120–£180 at an independent garage.
The bigger-ticket items to budget for include spark plugs (£150–£400), automatic transmission fluid (£300–£450), fuel filter (£200–£350).
See the full BMW 5 Series service schedule for every interval and cost breakdown.
The BMW 5 Series has some well-documented weak points, including 7 safety-critical issues that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable. 2015-2017 F10 LCI with the revised N57 530d or B47 520d are the sweet spot — BMW fixed the timing chain issues and these engines are genuinely robust. For petrol, 2019-2023 G30 models with B48 or B58 engines are proving excellent. Avoid 2011-2013 F10 520d with the N47 engine — timing chain failure is catastrophic and common. The E39 (1996-2003) with M54 petrol engine is a future classic but needs rust inspection.
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific BMW 5 Series, we cross-reference the exact variant, engine and age against our database of 23 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 23 known BMW 5 Series issues. We are not affiliated with any source listed.