Electrical System Related Problems of the 2018 Audi A4

Table 1 shows two common electrical system related problems of the 2018 Audi A4. The number one most common problem is related to the electrical system (19 problems). The second most common problem is related to the starter (one problem).

Table 1. Electrical System related problems of Audi A4

Problem Category Number of Problems
Electrical System problems
19
Starter problems
1

Recently reported Electrical System problems of the 2018 Audi A4

The Electrical System problem

A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: p084100, described as “transmission fluid pressure sensor/switch a range/performance,” with status listed as passive/sporadic.   Read details...

The Starter problem

See attached document for complaint   Read details...


Electrical System related problems in other Audi A4 model year vehicles:



A4 Service Bulletins
A4 Safety Recalls
A4 Defect Investigations