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2018 Audi A8 Mk4 (D5)

Browse our directory of 2018 Audi A8 Mk4 (D5) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.

Registration Directory

147 E17 OM1 JDV1 RTD23 MJ3 SGR49 ROC4 GCT500 TXM505 TPJ5 KSE61 BC6880 MT80 LSH82 KAD8 RUE94 BA9 YUBA12 XCYA15 LYKA180 MOBA19 LXBA24 LCSA28 CYPA28 KHYA51 FXXA8 EUVA8 FBVA8 GUWA8 HNXA8 JDGA8 LWVA8 OXVA8 PXWA8 TFVA8 TPYA8 UCGA8 VYTA8 XBDA8 XUB

Showing registrations 1–40 of 1,060 for the 2018 Audi A8 Mk4 (D5). Select any plate for an instant vehicle history check.

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Common Problems & Reliability

3
Serious
1
Moderate
0
Minor

The 2018 Audi A8 Mk4 (D5) has 4 known issues. 3 of these are classified as serious faults that could be expensive to repair. 1 are moderate concerns worth inspecting before purchase.

48V Belt-Starter Generator (BSG) Failure

Serious

The Continental BSG power transistors overheat and fail, causing the 48V system to shut down and eventually leaving the car stranded.

Symptoms: Multiple electrical system warnings, Start-stop inactive...

Est. repair cost: £0 (recall) – £2,500

Air Suspension Strut Leaks

Serious

The standard adaptive air suspension develops leaks over time, causing uneven ride height and expensive compressor replacement.

Symptoms: Car sitting low on one corner, Compressor running constantly...

Est. repair cost: £800–£3,000

TDI SCR / AdBlue System Faults

Serious

Diesel versions with SCR can develop dosing, heater or NOx sensor faults. A system fault may lead to a no-restart countdown even with sufficient AdBlue; diagnosis should distinguish fluid level from component failure.

Symptoms: AdBlue system warning, No-restart countdown

Dual-Touchscreen MMI Freezes

Moderate

Both the upper and lower MMI screens can freeze, go black, or reboot, affecting navigation, climate and seat controls.

Symptoms: Upper screen going black, Lower climate screen unresponsive...

Est. repair cost: £0–£2,500

View detailed Audi A8 Mk4 (D5) fault guide

Buying Tips for the 2018 Audi A8 Mk4 (D5)

  • Verify service campaign 27BQ has been completed via VIN before viewing
  • Check both upper and lower MMI screens for lag
  • Air suspension must sit level after standing overnight

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