The BMW E39 540i is the V8 flagship of BMW's E39 5 Series, sold in Australia from 1997 through to 2003. Powered by the 4.4-litre M62 or M62TU V8 producing around 210 kW and paired with a five-speed Steptronic automatic, it sits just below the M5 in the range and delivers genuine grand-touring performance at a fraction of its original cost. That price gap comes with a caveat: the 540i is an ageing enthusiast's car demanding diligent, proactive maintenance. Owners who stay on top of it are rewarded with a supremely refined drive; those who don't can face bills that dwarf the car's current market value.
Timing chain guides — the critical issue
This is the single most important thing to understand before buying an E39 540i. The M62 V8 uses plastic timing chain guides that are widely documented to deteriorate with age and kilometres. As the guides crack, they shed plastic debris into the oil, the chain develops excessive slack and can eventually jump a tooth or more — in a worst case, causing the chain to contact pistons or valves and turning a service item into a full engine rebuild.
- Affected engines: Both the M62 (1997–1999) and the revised M62TU (2000–2003). Some European BMW specialists treat guide replacement as mandatory scheduled maintenance at 100,000 miles (approx. 160,000 km).
- Warning signs: Chain rattle or slapping on cold start, plastic debris visible during an oil drain, rough idle from chain slack upsetting cam timing.
- Fix: Full replacement of all guides, tensioners and chains — a significant job requiring partial engine disassembly. Expect roughly $2,500–$5,000+ at a reputable BMW specialist in Australia, depending on wear found.
- Buying tip: Treat documented guide replacement as a mandatory question. If a car over 150,000 km has no paperwork, budget for the job immediately or negotiate the price down accordingly.
VANOS variable valve timing (M62TU, 2000–2003)
The updated M62TU introduced dual VANOS (variable timing on both cams), which improves power delivery but adds a known failure mode: the VANOS seals — an O-ring at the outer housing perimeter and a dynamic rod seal at the inner perimeter — harden and fail with age.
- Symptoms: Rough idle that improves at higher revs, a diesel-like clatter on cold start, flat mid-range power, and poor fuel economy.
- Fix: VANOS seal rebuild. Kits are widely available and many experienced owners tackle this DIY. Workshop cost: roughly $400–$900, ideally combined with timing chain system work to share labour.
Cooling system
BMW made extensive use of plastic across the E39 cooling system — radiator end tanks, expansion tank, thermostat housing and the water pump impeller — and all of it becomes brittle with age. Catastrophic, sudden failure is well documented.
- Radiator: Plastic end tanks can crack or separate from the aluminium core, causing rapid coolant loss with little warning.
- Water pump: The plastic impeller can shed blades without leaking — the shaft still spins but coolant circulation stops. The car overheats before any external sign appears.
- Expansion tank and thermostat housing: Both are plastic and prone to cracking at seams or around fittings.
The widely recommended approach is to replace the entire system — radiator, water pump, expansion tank, thermostat and hoses — in one go. Fitting a new radiator raises system pressure and commonly triggers the next-weakest component to fail shortly after. A comprehensive overhaul typically costs $1,200–$2,500 at a BMW specialist.
Oil leaks
High-mileage M62 engines almost universally develop oil seepage from several predictable spots.
- Valve cover gaskets: The rubber gasket on each cam cover hardens and shrinks with heat cycles, allowing oil to seep onto hot exhaust surfaces. You'll often smell it before seeing it. Cost: roughly $300–$700 per side.
- Oil filter housing gasket: Another common seepage point where the housing mounts to the block. The gasket is cheap; accessing it isn't. Budget around $200–$500.
- VANOS front cover seals: Further leak points around the VANOS solenoids, typically addressed during seal rebuild work.
Secondary air injection pump
The secondary air injection system is a common source of check engine lights on the E39 540i. The fault typically logs as insufficient air flow, but the pump motor is often not the culprit — the switching valve, relay, or blocked head ports are more frequent causes. Diagnose before replacing the pump; a new pump with labour runs roughly $600–$1,200.
Electrical issues
Window regulators
Plastic clip-and-cable window regulator mechanisms wear out across all four doors and are one of the most frequently reported annoyances in E39 owner forums. Windows may stick mid-travel or refuse to move. Regulator replacement costs roughly $200–$500 per window including labour.
OBC and MID pixel failure
The on-board computer display in the instrument cluster and the multi-information display in the centre console use LCD ribbon cables that degrade over time, producing missing pixel rows or columns. Specialist resoldering services (available around Australia) typically cost $80–$200 and are far cheaper than sourcing replacement display units.
Final stage resistor
The heater blower's final stage resistor unit (FSU) fails over time, leaving the blower operating only on certain speeds or cycling erratically. It's an easy replacement in the engine bay — parts and labour around $150–$350.
Suspension — thrust arm bushes
The front suspension thrust arms use rubber bushes that wear out across the E39 range. The classic symptom is a steering shimmy at 80–110 km/h, especially under braking — often mistaken for warped brake rotors. Replacement arms or bushes (with a wheel alignment) cost roughly $400–$900. On high-mileage cars, control arm and rear trailing arm bushes are also worth inspecting.
Recalls & safety
The E39 540i is subject to recalls listed on Carify across multiple years. The most significant is the Takata airbag inflator recall affecting BMW 5 Series E39 model years 2000–2003 in Australia. In hot and humid conditions, the inflator propellant can degrade and cause the metal housing to rupture, propelling fragments toward occupants — a serious injury risk. Owners can call the BMW Takata Hotline on 1800 243 675 or visit recall.bmw.com.au to arrange a free replacement.
Check recall details for each model year with recorded data on Carify:
- BMW 540i 1998 — recalls & problems
- BMW 540i 1999 — recalls & problems
- BMW 540i 2000 — recalls & problems
- BMW 540i 2001 — recalls & problems
- BMW 540i 2003 — recalls & problems
Buying a used BMW 540i? What to check
- Timing chain service record. Ask for documentation. If it's not there on a car over 150,000 km, assume the job hasn't been done.
- Cold-start listen. Start from cold and listen for chain rattle or VANOS clatter in the first 30 seconds. Persistent noise is a serious red flag.
- Cooling system receipts. Look for evidence that the radiator, water pump, expansion tank and thermostat have been replaced. Check the overflow tank for cracks around the neck.
- Oil leak inspection. Look along the front of the engine and across the cam covers. Some seepage is common on older cars; heavy leaking indicates deferred work.
- Electrical checks. Test all four windows and check OBC and MID displays for missing pixels.
- Airbag recall status. Confirm the Takata recall has been completed with paperwork from BMW.
- History check. Run a Carify VIN check or PPSR check to confirm the car is free of finance, write-off history, or odometer discrepancies before you commit.
The verdict
The E39 540i is one of the most rewarding used BMWs an enthusiast can buy — a genuine V8 grand tourer with timeless proportions. But it is not a low-maintenance car. The timing chain guide issue is a genuine concern on any unserviced example, and the cooling system's plastic components are living on borrowed time if they haven't been overhauled. Find a well-documented car with the major work done, budget realistically for what's outstanding, and engage a BMW specialist who knows the E39. For a broader look at recalls across all makes and models, visit the Carify car problems & recalls hub.