1997–1998 Audi A6 Mk2 (C5)
Browse our directory of 1997–1998 Audi A6 Mk2 (C5) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 1997–1998 Audi A6 Mk2 (C5) has 4 known issues. 1 of these are classified as serious faults that could be expensive to repair. 3 are moderate concerns worth inspecting before purchase.
Blocked Plenum Drains
SeriousLeaves and debris block the drains, leading to water entering the cabin and damaging the CCM.
Symptoms: Wet front carpets, Electrical behaving strangely
Est. repair cost: £100–£800
Front Multi-Link Suspension Wear
ModerateThe C5 uses a sophisticated aluminium multi-link front suspension with eight control arms per side. Bushings harden and ball joints develop play, causing clunks and vague steering.
Symptoms: Clunking over bumps, Imprecise steering...
Est. repair cost: £350–£900
ABS Module Failure
ModerateThe Bosch 5.3/5.7 ABS control unit develops internal solder faults, triggering ABS and brake warning lights and sometimes causing speedometer dropouts.
Symptoms: ABS and brake warning lights, Speedometer dropping to zero...
Est. repair cost: £200–£500
Driver Door Wiring Loom Breakage
ModerateWires in the rubber boot between the body and driver door fatigue and snap over time, causing central locking, window and mirror failures.
Symptoms: Door window stops working, Central locking intermittent...
Est. repair cost: £100–£300
Buying Tips for the 1997–1998 Audi A6 Mk2 (C5)
- ✓Check the front carpets for dampness (blocked plenum drains)
- ✓The multi-link front suspension is complex and expensive to refresh
- ✓1.8T models need proof of regular oil changes
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