EXPERT IN AUTO PARTS
26 November 2025 (updated) Table of Contents
The windscreen washer system in the BMW E39 frequently malfunctions, which manifests itself in a lack of cleaning fluid on the windscreen. The 520i and 525i models are particularly affected, with the windscreen washer system showing its first weak points after just 60,000-80,000 kilometres. The most common symptoms are a lack of spray pattern or weak water pressure, which can significantly impair visibility. Blocked spray nozzles, defective hoses or a failed pump are the typical complaints that lead to this fault. The reliability of the system decreases significantly with age, with frost and limescale deposits further shortening the service life.
Regular maintenance is crucial for the functionality of the windscreen washer system. The sensitive BMW E39 spray nozzles require regular cleaning with a thin needle or compressed air to prevent blockages. If the pump is defective, the fuse should be checked first before replacing it. The preventive use of antifreeze and regular inspection of the hoses for cracks will considerably extend the service life of the system.
The electric tailgate of the BMW E39 develops typical faults that manifest themselves in incomplete opening or complete failure. The 530d and 535i models in particular show these weak points from a mileage of 100,000 km. The tailgate no longer opens automatically or stops during the opening process, which indicates defective servomotors, worn microswitches or problems with the gas strut. Corrosion on the electrical contacts further exacerbates these problems. The symptoms progressively worsen and can lead to a complete system failure, which means that the tailgate can only be operated manually.
A systematic check is essential for diagnosing tailgate problems. The complex BMW E39 tailgate mechanisms require a thorough inspection of the electrical connections and mechanical components every 50,000 km. Replacement of defective actuators or repair of the gas struts should only be carried out by specialised personnel. Regular lubrication of the moving parts and cleaning of the contacts can prevent premature failures.
Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC
-42%
RIDEX Tyre pressure sensor (TPMS)
with groove, with valves
Article number: 2232W0084
compared to
RRP
£43.80
£24.99£99.96 / Price per 4 items
price incl. 20% VAT, excl. delivery costs
-23%
Article number: 5011987001831
compared to
RRP
£22.73
£17.49
£17.49
for 1 litre
price incl. 20% VAT, excl. delivery costs
-51%
Article number: 502 184
compared to
RRP
£293.77
£141.49price incl. 20% VAT, free delivery
LIQUI MOLY Engine oil
5W-30, 5l
Article number: 3707
£79.49
Price per item
£15.90
for 1 litre
price incl. 20% VAT, excl. delivery costs
-5%
FEBI BILSTEIN Fuel cap
not lockable, Plastic, black, with support strap
Article number: 45550
compared to
RRP
£17.99
£16.99price incl. 20% VAT, excl. delivery costs
The handbrake of the BMW E39 shows characteristic signs of wear, which manifest themselves in a lack of braking effect or incomplete release. These faults typically occur between 80,000-120,000 km and affect all engine variants equally. The handbrake does not engage or disengage correctly, which can lead to dangerous situations. Common complaints are excessive handbrake lever travel, dragging brake pads even when the handbrake is released or insufficient holding power on hills. The causes usually lie in worn brake pads, stretched cables or defective actuating mechanisms. Corrosion on the brake callipers exacerbates these problems.
Professional maintenance is necessary for the handbrake to function properly. The BMW E39 handbrake systems require adjustment every 40,000-60,000 km and regular replacement of the brake pads. The cables should be checked for corrosion and proper tension. Correct adjustment of the handbrake ensures both safety and the longevity of the entire brake system.
The lighting system of the BMW E39 has specific weak points, which are particularly evident in the indicators and main beam. These malfunctions often occur after 120,000-150,000 km and are characterised by intermittent operation or complete failure. The indicator does not work constantly or switches off automatically, while the main beam does not come on or flickers irregularly. Defective relays, worn switches on the steering column or problems with the light control are the most common causes. Additional problems with the ballasts occur particularly in models with xenon light. The reliability of the lighting decreases with age, which harbours safety risks.
A professional inspection is necessary to diagnose lighting problems. The BMW E39 lighting systems require regular checks of all electrical connections and the timely replacement of defective components. The fuses and relays should be checked at the first sign of malfunction. Preventive maintenance of the lighting system every 50,000 kilometres can prevent costly repairs and ensure road safety.
Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC
Article number: VE18320
More
£31.49
£31.49
for 1 litre
price incl. 20% VAT, excl. delivery costs
-14%
Article number: 15F7E5
compared to
RRP
£50.65
£43.49
£10.87
for 1 litre
price incl. 20% VAT, excl. delivery costs
-63%
Article number: 36800-SET-MS
compared to
RRP
£304.78
£111.49price incl. 20% VAT, excl. delivery costs
Article number: EK720
£125.99price incl. 20% VAT, free delivery
VALEO Clutch kit
with dual-mass flywheel, with flywheel screws, with lock screw set, with clutch release bearing, 229mm
Article number: 837049
£413.50price incl. 20% VAT, free delivery
The mirror heater in the BMW E39 develops typical faults which manifest themselves in the form of uneven heating or complete failure. These problems occur particularly in the cold season and affect vehicles with a mileage of 100,000 kilometres or more. The mirror heater no longer works properly, causing the exterior mirrors to mist up and impair visibility. Frequent symptoms are partially or completely defrosted mirror surfaces, which leads to safety problems, especially in frosty conditions. The causes usually lie in defective heating elements within the mirror glass, interrupted electrical circuits or problems with the control system. Corrosion on the electrical connections further exacerbates these faults.
Regular maintenance is important for the mirror heating system to function properly. The BMW E39 mirror heating systems require a check of the electrical connections and, if necessary, replacement of the heating elements. Diagnosis is carried out by measuring the power consumption and visually inspecting the connections. A professional repair ensures road safety and prevents fogged mirrors in unfavourable weather conditions.
Based on the experience of BMW E39 drivers, the following additional problems occur:
| Strengths | Weak points |
|---|---|
| High-quality workmanship | Windscreen washer system problems |
| Balanced driving behaviour | Tailgate defects |
| Comfortable suspension | Handbrake wear |
| Spacious interior | Lighting defects |
| Solid engine technology | Mirror heater failures |
| Timeless design | Cooling system leaks |
| Good long distance capability | Electronic faults |
The BMW E39 is considered one of the most reliable vehicles in its class, but requires consistent maintenance and care. Most common faults can be avoided or rectified at an early stage through preventive measures and regular inspections. The electrical components and wearing parts in particular require attention in order to maintain the characteristic longevity and reliability of the model.
Useful videos on this topic:
FEBI BILSTEIN Valve, engine block breather
with fastening/mounting material
Sold by AUTODOC
FEBI BILSTEIN Antifreeze
G11, blue, 5l, Concentrate
Sold by AUTODOC
SACHS Torque Converter
Ø: 260 mm
Sold by AUTODOC
BMW Engine oil
5W-30, 1l
Sold by AUTODOC
LEMFÖRDER Top strut mount
Front Axle Left, Front Axle Right, with integrated ball bearing
Sold by AUTODOC
ZF GETRIEBE Automatic transmission fluid
1l
Sold by AUTODOC
MEYLE Gearbox service kit
with accessories, without oil
Sold by AUTODOC
MOBIL Engine oil
5W-40, 5l
Sold by AUTODOC
FEBI BILSTEIN Gearbox service kit
with gasket/seal, with oil drain plug, with bolts/screws
Sold by AUTODOC
FEBI BILSTEIN Automatic transmission fluid
ATF II, 5l, red
Sold by AUTODOC