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2018 Audi S4 Report

Known issues, recalls, running costs, and what to check before you buy.

Updated Jun 2, 2026·Ethan Miller·3 Critical Recalls
2018 Audi S4 Report

Overall Score

6.8/ 10
Our Verdict
Proceed with caution

Key Takeaways

  • The 2018 Audi S4 has a 'Below Average' reliability verdict, primarily due to concerns with the passenger airbag system.
  • Four recalls were issued, with a focus on the Passenger Occupant Detection System (PODS) and its wiring. Confirm recall 21V874000 (74E3) has been properly addressed.
  • While there are zero owner complaints logged, a high volume of Technical Service Bulletins (TSBs) suggests underlying complexities or potential issues.
  • The 3.0-liter V6 engine requires premium fuel, contributing to higher running costs.
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OverviewWho This Car Is ForReliability & ProblemsVehicle SpecsUnlock Full ReportFAQ
Overview

2018 Audi S4

The 2018 Audi S4 is a performance-oriented sedan that blends potent acceleration with all-weather capability thanks to its standard Quattro all-wheel drive. Powered by a 3.0-liter V6 engine paired with an 8-speed automatic transmission, it delivers brisk performance. However, used car shoppers should be aware of potential reliability issues, including a significant number of recalls related to the passenger airbag system. With a combined EPA rating of 24 MPG, it offers reasonable efficiency for its class, though premium fuel is required.

Critical Failure Risk

Recalls indicate potential oxidation and contact faults in the PODS connecting cable, which can disable the passenger airbag. This issue is not strictly mileage-dependent and relates to component design and aging.

Early detection can help you avoid a $500-$1,500 repair.

Open Maintenance Analysis →

Safety & Bulletins

Open Recalls4
Service Bulletins0
Full Recall History →

Owner Complaints

0

No primary complaint themes found.

Detailed Issue Breakdown →

Performance & Efficiency

Fuel Efficiency
Combined
24
MPG
City
21
MPG
Highway
30
MPG
Full Vehicle Specifications ↓

Reliability

8.2/ 10

Practicality

4.9/ 10

The score is mainly limited by high fuel consumption.

Buyer Fit

Who This Car Is For

Best for

Drivers seeking a blend of performance and all-weather capability.

+2 more buyer-fit notes in the full report

Avoid if

Budget-conscious buyers concerned about potential repair costs.

+2 more buyer-fit warnings in the full report

2018 Audi S4 Reliability Analysis

Explore comprehensive reliability data including official safety recalls, consumer complaints, and common mechanical failures for the 2018 Audi S4.

  • Recall TimelineOfficial safety notices
  • Owner ComplaintsReal driver reports
  • Failure AnalysisKnown part defects
Specs

Vehicle Specs

Fuel Type
Premium
Seating Capacity
5
Transmission
Automatic (AM-S8)
Drivetrain
All-Wheel Drive
Body Style
Sedan
EPA Combined MPG
24

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Unlock the complete checklist, maintenance outlook, and buyer verdict in one place.

Most Common Issues

1. Passenger Occupant Detection System (PODS) Electrical Issues

Most reported

Usage data observed

2. High Volume of Technical Service Bulletins (TSBs)

Usage data observed

See all common issues in the maintenance guide

First Service Interval

- Oil Change (5W-40 Synthetic) (Parts: 5W-40 Synthetic Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection

Est. shop cost: $150 - $250

10,000 mi

Unlock the full maintenance guide for every scheduled service interval and cost forecast.

Full pre-purchase inspection checklist
Complete maintenance schedule (6 service intervals)
Repair forecasts with mileage and cost context
Full buyer-fit guidance and who should avoid it
Full specs and trim-level context
4 recall campaign details & remedy notes
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FAQ

FAQ

Is the 2018 Audi S4 reliable?▾

The CarFocal Reliability Score for the 2018 Audi S4 is 8.2/10. Reliability score is 8.2/10. NHTSA recalls: 4. Owner complaints: 0.

How practical is the 2018 Audi S4 for daily use?▾

Practicality score is 4.9/10. The score is mainly limited by high fuel consumption. EPA combined economy is 24 MPG. Seating capacity is 5. 4 passenger doors are listed. Boot capacity is 368 litres.

What is the overall score for the 2018 Audi S4?▾

The CarFocal Overall Score for the 2018 Audi S4 is 6.8/10. Overall score is 6.8/10 (Good). Confidence 55%. Maintenance 7.5/10. Practicality 4.9/10.

What does it cost to own and maintain a 2018 Audi S4?▾

Based on Carfocal's data, First listed service: - Oil Change (5W-40 Synthetic) (Parts: 5W-40 Synthetic Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection at 10,000 miles. Estimated first-year maintenance: $1,000 - $1,500. Repair prediction highlight: Passenger Occupant Detection System (PODS) Electrical System (typical at 50,000 miles, estimated cost Min: $500 • Max: $1,500).

What is the MSRP range for the 2018 Audi S4?▾

Base MSRP is $55,800.

What engine is in the 2018 Audi S4?▾

Engine specs list 6 • 3.0.

What transmission does the 2018 Audi S4 use?▾

According to CarFocal's specs for the 2018 Audi S4, transmission is Automatic (AM-S8). The paired drivetrain is All-Wheel Drive.

Does the 2018 S4 require Premium gas?▾

Manufacturer fuel recommendation: Premium.

What is the combined EPA MPG for the 2018 Audi S4?▾

EPA combined estimate is 24 MPG.

What driver assistance and safety features are available on the 2018 Audi S4?▾

11 standard and 3 optional driver assistance features. Key features include Anti-lock Braking System, Electronic Stability Control, Traction Control.

How many people fit in a 2018 Audi S4?▾

According to CarFocal's specs for the 2018 Audi S4, seating capacity is 5.

What body style is the 2018 Audi S4?▾

According to CarFocal's specs for the 2018 Audi S4, body style is sedan.

What drivetrain does the 2018 Audi S4 use?▾

According to CarFocal's specs for the 2018 Audi S4, drivetrain is All-Wheel Drive. Transmission is Automatic (AM-S8).

What are the NHTSA safety ratings for the 2018 Audi S4?▾

NHTSA ratings: Rollover 5/5.

Are there open safety recalls on the 2018 Audi S4?▾

This model year has 4 official safety campaigns listed.

Start Here

Maintenance guide

Costs + intervals

Recall report

Campaigns + remedy notes

Owner complaints

Issue volume + categories

In this guide

  1. 01Overview
  2. 02Who This Car Is For
  3. 03Reliability & Problems
  4. 04Vehicle Specs
  5. 05Unlock Full Report
  6. 06FAQ

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