IsItAGoodCar
Reliability Guide

Common Problems with the
1998 BMW 7 Series (E38)

The 1998 facelift, sold from September, brought revised headlights and tail lights, double-VANOS M52 engines, single-VANOS M62s, the 740d V8 diesel and the Sport package. It is the E38 most UK buyers should target.

What changed for 1998

  • •M52TU gains double VANOS; M62TU gains single VANOS
  • •740d introduced with the 3.9-litre M67 twin-turbo V8 diesel
  • •Sport package with M Sport suspension, Contour seats and Style 37 wheels
  • •DSC III stability control and head airbags become standard

Common MOT watch-outs

  • !Pixel loss on the instrument cluster and MID display
  • !EDC shock absorber leaks and accumulator failures
  • !Corroded brake lines along the rear axle
4
Known Issues
3
Serious
0
Moderate
1
Minor

All Known Issues

Fuel Tank Leak

SeriousFuel System

The pressed-steel saddle fuel tank develops rust along the crimped centre seam and around the upper breather pipes due to trapped road grime. Remedying requires dropping the exhaust, propshaft, and rear subframe.

Est. Repair Cost: £800–£1,500
Warning Signs:

Strong smell of petrol near rear offside wheel arch after filling past half tank, Visible damp stain or fuel dripping in front of rear right tyre, Hissing sound from filler cap

What to Inspect:
  • Fill fuel tank to brim and inspect underneath rear axle for leaks
  • Inspect fuel tank seams with a torch for rust blistering
Verified by IsItAGoodCar Research TeamUpdated

EDC Suspension Leaks

SeriousSuspension & Chassis

The optional Electronic Damper Control (EDC) active shock absorbers leak hydraulic damping oil past internal shaft seals. Replacement OEM dampers cost upwards of £800 each, prompting many UK owners to fit standard Sachs dampers.

Est. Repair Cost: £1,000–£2,500
Warning Signs:

Floaty or overly harsh ride over bumps, Damp hydraulic oil coating the shock bodies, Knocking from rear strut tops

What to Inspect:
  • Switch EDC button between Comfort and Sport and check for damping changes
  • Inspect all four shock absorber bodies for oily mist or leaks
Verified by IsItAGoodCar Research TeamUpdated

Cooling System Overhaul

SeriousCooling System

Like the E39, the M52, M60, and M62 cooling systems suffer from brittle plastic radiator necks that snap under pressure, weeping water pump bearings, and cracked expansion tanks.

Est. Repair Cost: £300–£600
Warning Signs:

Sudden overheating in stop-start traffic, Antifreeze pooling on front undertray, Viscous fan clutch free-spinning when engine is hot

What to Inspect:
  • Check radiator upper hose neck for brown discoloration or cracks
  • Confirm viscous fan engages with a roar when hot
  • Check coolant expansion tank for hairline cracks
Verified by IsItAGoodCar Research TeamUpdated

Dashboard Pixel Loss

MinorInterior & Trim

The flexible ribbon cables connecting the LCD display to the instrument cluster circuit board degrade with heat and humidity, causing text lines in the odometer and Multi-Information Display (MID) to disappear.

Est. Repair Cost: £100–£200
Warning Signs:

Missing rows or columns of pixels on the cluster check-control display, Illegible trip computer and radio station readout, Temperature display fragmented

What to Inspect:
  • Run cluster self-test by holding the right reset button to light all pixels
  • Check clarity of check-control messages
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 1998 BMW 7 Series (E38)

  • Illuminate the cluster and MID and check every pixel row for dropouts
  • Bounce each corner and look for weeping fluid on the EDC dampers
  • Verify the 740d's twin turbos and injectors have had attention, as parts are specialist-only
19971999–2001
Check a 1998 BMW 7 Series (E38) by Registration