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2021 Audi A4 Report

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

Updated Jun 2, 2026·Ethan Miller
2021 Audi A4 Report

Overall Score

7.4/ 10
Our Verdict
Proceed with caution

Key Takeaways

  • The 2021 Audi A4 has a 'Below Average' reliability verdict, primarily due to a high volume of safety-related recalls.
  • Key recall areas include seat belt retractors and rear axle components, indicating potential systemic issues.
  • Despite numerous recalls, consumer complaint counts are zero, suggesting proactive manufacturer intervention or data limitations.
  • The vehicle achieves a strong 5-star overall NHTSA safety rating, with perfect scores in side and rollover impacts.
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OverviewWho This Car Is ForReliability & ProblemsVehicle SpecsUnlock Full ReportFAQ
Overview

2021 Audi A4

The 2021 Audi A4 offers a premium compact sedan experience, blending sophisticated design with competent performance. For the used car shopper, this model presents a compelling option, but one that requires a discerning eye. Its safety scores are top-notch, and the all-wheel-drive system provides confidence in various conditions. However, a significant number of recalls, especially those impacting critical safety systems like seat belts and the rear axle, cannot be overlooked. These issues, despite a lack of reported consumer complaints, suggest potential for residual risk and underscore the importance of thorough pre-purchase inspections. Potential repair costs associated with these documented issues should factor into the buying decision.

Critical Failure Risk

Recalls indicate potential issues with rear axle lock nuts and alignment. This can lead to compromised structural integrity and uneven tire wear over time.

Early detection can help you avoid a $200-$600 repair.

Open Maintenance Analysis →

Safety & Bulletins

Open Recalls46
Service Bulletins0
Full Recall History →

Owner Complaints

0

No primary complaint themes found.

Detailed Issue Breakdown →

Performance & Efficiency

Fuel Efficiency
Combined
26
MPG
City
24
MPG
Highway
30
MPG
Full Vehicle Specifications ↓

Reliability

7.6/ 10

Practicality

4.7/ 10

The score is dragged down by its weaker day-to-day practicality signals.

Buyer Fit

Who This Car Is For

Best for

Drivers seeking a premium compact sedan with strong safety credentials.

+2 more buyer-fit notes in the full report

Avoid if

Buyers prioritizing absolute long-term reliability and minimal repair concerns.

+2 more buyer-fit warnings in the full report

2021 Audi A4 Reliability Analysis

Explore comprehensive reliability data including official safety recalls, consumer complaints, and common mechanical failures for the 2021 Audi A4.

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

Vehicle Specs

Fuel Type
Premium
Seating Capacity
5
Transmission
Automatic
Drivetrain
AWD/All-Wheel Drive
Body Style
Chassis Cab
EPA Combined MPG
26

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Most Common Issues

1. Rear Axle Integrity

Most reported

Usage data observed

2. Seat Belt Retractor Malfunction

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
46 recall campaign details & remedy notes
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FAQ

FAQ

Is the 2021 Audi A4 reliable?▾

The CarFocal Reliability Score for the 2021 Audi A4 is 7.6/10. Reliability score is 7.6/10. NHTSA recalls: 46. Owner complaints: 0.

How practical is the 2021 Audi A4 for daily use?▾

Practicality score is 4.7/10. The score is dragged down by its weaker day-to-day practicality signals. EPA combined economy is 26 MPG. Seating capacity is 5.

What is the overall score for the 2021 Audi A4?▾

The CarFocal Overall Score for the 2021 Audi A4 is 7.4/10. Overall score is 7.4/10 (Good). Confidence 85%. Maintenance 7.5/10. Practicality 4.7/10.

What does it cost to own and maintain a 2021 Audi A4?▾

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: $800 - $1,500. Repair prediction highlight: Rear Axle Components (typical at 75,000 miles, estimated cost Min: $500 • Max: $1,500).

What is the MSRP range for the 2021 Audi A4?▾

Base MSRP is $39,100.

What engine is in the 2021 Audi A4?▾

Engine specs list 4 • 2.0.

What transmission does the 2021 Audi A4 use?▾

According to CarFocal's specs for the 2021 Audi A4, transmission is Automatic. The paired drivetrain is AWD/All-Wheel Drive.

Does the 2021 A4 require Premium gas?▾

Manufacturer fuel recommendation: Premium.

What is the combined EPA MPG for the 2021 Audi A4?▾

EPA combined estimate is 26 MPG.

What driver assistance and safety features are available on the 2021 Audi A4?▾

12 standard driver assistance features. Key features include Anti-lock Braking System, Electronic Stability Control, Traction Control.

How many people fit in a 2021 Audi A4?▾

According to CarFocal's specs for the 2021 Audi A4, seating capacity is 5.

What body style is the 2021 Audi A4?▾

According to CarFocal's specs for the 2021 Audi A4, body style is chassis_cab.

What drivetrain does the 2021 Audi A4 use?▾

According to CarFocal's specs for the 2021 Audi A4, drivetrain is AWD/All-Wheel Drive. Transmission is Automatic.

What are the NHTSA safety ratings for the 2021 Audi A4?▾

NHTSA ratings: Overall 5/5 • Frontal 4/5 • Side 5/5 • Rollover 5/5.

Are there open safety recalls on the 2021 Audi A4?▾

This model year has 46 official safety campaigns listed.

Should buyers consider alternatives to the 2021 Audi A4?▾

Alternatives listed in this guide: 2021 Mercedes-Benz C-Class and 2021 Lexus ES.

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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