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2021 Acura ILX Owner Complaints

Updated May 30, 2026
Daniel Wilson
2021 Acura ILX Owner Complaints

Complaint Summary

The 2021 Acura ILX has 13 reported complaints.

  • Top issues involve unknown or other and air bags.

Reliability Score

Reliability Score

8.4/ 10

Based on 13 complaints

Most Frequent Issues

UNKNOWN OR OTHER

3 23.1%

AIR BAGS

2 15.4%

ELECTRICAL SYSTEM

1 7.7%

FORWARD COLLISION AVOIDANCE: WARNINGS

1 7.7%

SEAT BELTS

1 7.7%

Quick Insights

  • The top category is UNKNOWN OR OTHER, accounting for 23.1% of all complaints.

  • Owners have reported issues across 10 distinct vehicle systems.

  • Note: Complaint data reflects owner reports and may not always indicate a verified defect. Compare with Recalls and TSBs for a complete picture.

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Complaint Summary

What owners keep reporting on the 2021 Acura ILX

The 2021 Acura ILX has 13 owner complaints in this dataset. UNKNOWN OR OTHER is the most common complaint category, representing about 23% of the reports shown here.

Most common complaint categories

The top complaint groups for the 2021 Acura ILX are UNKNOWN OR OTHER (3), AIR BAGS (2), ELECTRICAL SYSTEM (1).

Are these complaints a serious red flag?

Potentially. 4 complaint reports involve higher-attention systems like brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection.

What should buyers inspect on a used 2021 Acura ILX?

Start with the top complaint systems, compare them against the recall report, then inspect service records for evidence that those same areas were already repaired or monitored.

Read the full buyer guideRecall report and remedy notesMaintenance costs and intervals2020 ILX complaints2022 ILX complaints2019 ILX complaints

Detailed Complaint Log

Showing 10 of 10 systems

UNKNOWN OR OTHER

3 Reports23% of total

Previewing the first 2 complaint summaries.

Vehicle suddenly decelerated without warning. Transmission would not shift to a higher gear causing the vehicle rev. Warning lights on the dashboard started going off at the same time. Lanes departure and adaptive cruise control warning went off. Had to have vehicle towed to dealership. Lucilky this happened on a rural backroad and not on the freeway or busy road as someone could have rear-ended the vehicle. Dealership was given video of incident and couldn't replicate the issue and we were told that the car did not store any of the error codes for the warning lights that came on the dash. The evening before the brake lights would not turn off when when the vehicle was turned off. Dealership said it was an adjustment that needed to be made to the switch on the brake pedal. Car is unsafe to drive as if this were to happen again on a busy highway or road without notice the persons behind would not be expecting the vehicle to suddenly drastically drop speed and not be able to accelerate.

9/2/2021

It is Acura ILX 2021. The current mileage is 17,480. What component or system failed or malfunctioned, and is it available for inspection upon request? *Driveshaft/suspension is broken after inspection. How was your safety or the safety of others put at risk? *Intense shaking coming from underneath the vehicle. Worn out u-joints, couplers or carrier bearings can cause the driveshaft to vibrate and make noise when passing over bumps and potholes. If not fixed, it can lead to further damage to other drivetrain components. Has the problem been reproduced or confirmed by a dealer or independent service center? * Not sure for 2021 model. However, there is a recall history for model 2016-2019 Acura ILX. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? * The vehicle was inspected and waiting for remedy. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? * No there is no sign of warning. Due to extreme noise, the vehicle was inspected.

10/20/2023

1 more complaint is available in this category.

AIR BAGS

2 Reports15% of total

Previewing the first 2 complaint summaries.

The contact owns a 2021 Acura ILX. The contact stated while attempting to park the vehicle, the airbag deployed without impact which resulted in the contact crashing into a pole. The contact sustained a hurt knee and headaches that required medical treatment. The vehicle was towed to a local dealer where it was awaiting repairs. The contact stated no warning lights were illuminated. The manufacturer was informed of failure and was awaiting a response. The failure mileage was approximately 2,000.

1/13/2022

I am submitting this complaint regarding a 2021 Acura ILX (VIN: [XXX] ) that has been unreleasable for an extended period due to manufacturer inability to supply a required safety component. The vehicle was involved in an accident on July 6, 2025 and delivered to Caliber Collision in Corpus Christi, Texas. All accident-related repairs have been completed. However, the vehicle cannot be released because a required airbag and/or airbag module is unavailable. American Honda Motor Company, Inc. has advised that the safety component is unavailable to be sold and that no estimated time of availability exists. Due to the safety nature of the missing component, the repair facility has confirmed the vehicle cannot be legally or safely released. The delay is no longer accident-related and is solely due to manufacturer unavailability of a safety-critical, non-cosmetic part. I have requested interim solutions including buyback, rental assistance, or a dealership loaner, and no temporary or permanent solution has been provided. This complaint is submitted to document manufacturer inability to supply a required safety component resulting in extended loss of vehicle use. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

12/19/2025

ELECTRICAL SYSTEM

1 Report8% of total

Previewing the first 1 complaint summaries.

Electrical Failure. Safety was an issue with vehicle needing constant jumps. Problem was checked at dealer. My concern was continuously overlooked. Warning lamps didn't warn.

12/23/2022

FORWARD COLLISION AVOIDANCE: WARNINGS

1 Report8% of total

Previewing the first 1 complaint summaries.

Electrical Failure. Safety was an issue with vehicle needing constant jumps. Problem was checked at dealer. My concern was continuously overlooked. Warning lamps didn't warn.

12/23/2022

SEAT BELTS

1 Report8% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Acura ILX. The contact stated that after entering the vehicle, he became aware that the driver's seat belt was stuck and would not uncoil. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the seat belt assembly. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was unknown.

10/2/2023

SUSPENSION

1 Report8% of total

Previewing the first 1 complaint summaries.

It is Acura ILX 2021. The current mileage is 17,480. What component or system failed or malfunctioned, and is it available for inspection upon request? *Driveshaft/suspension is broken after inspection. How was your safety or the safety of others put at risk? *Intense shaking coming from underneath the vehicle. Worn out u-joints, couplers or carrier bearings can cause the driveshaft to vibrate and make noise when passing over bumps and potholes. If not fixed, it can lead to further damage to other drivetrain components. Has the problem been reproduced or confirmed by a dealer or independent service center? * Not sure for 2021 model. However, there is a recall history for model 2016-2019 Acura ILX. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? * The vehicle was inspected and waiting for remedy. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? * No there is no sign of warning. Due to extreme noise, the vehicle was inspected.

10/20/2023

EXTERIOR LIGHTING:HEADLIGHTS

1 Report8% of total

Previewing the first 1 complaint summaries.

Upon and after raining the headlights leak and water enters the inside of the headlights. It my cause a short. Unsafe driving conditions at night.

1/22/2024

VISIBILITY:WINDSHIELD

1 Report8% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Acura ILX. The contact stated that while driving at an undisclosed speed, he became aware that the white lines on the road appeared curved through the windshield. The contact then noticed that the windshield was distorted. The vehicle was taken to the dealer, where the contact was informed that the windshield was delaminating and needed to be replaced. The windshield was replaced under warranty; however, the replacement windshield was also defective. The vehicle was not repaired. The dealer referred the contact to the manufacturer. The manufacturer was notified of the failure. The contact was awaiting a call back from the manufacturer. The failure mileage was approximately 9,600.

2/29/2024

LANE DEPARTURE: BLIND SPOT DETECTION

1 Report8% of total

Previewing the first 1 complaint summaries.

My vehicle continues to accelerate when I press the gas pedal, and it sometimes makes clicking noises from underneath during acceleration. Occasionally, it veers to one side even when I keep the steering wheel straight. At times, it gives a warning and vibrates as if I'm merging into another lane. When I press the gas, the engine revs, but the car doesn't accelerate. Issues have been ongoing but dealership where I got the car from wants to charge me inspection fees per symptom.

7/30/2024

LANE DEPARTURE: WARNING

1 Report8% of total

Previewing the first 1 complaint summaries.

My vehicle continues to accelerate when I press the gas pedal, and it sometimes makes clicking noises from underneath during acceleration. Occasionally, it veers to one side even when I keep the steering wheel straight. At times, it gives a warning and vibrates as if I'm merging into another lane. When I press the gas, the engine revs, but the car doesn't accelerate. Issues have been ongoing but dealership where I got the car from wants to charge me inspection fees per symptom.

7/30/2024

About This Data

Data and Methodology

MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

FAQ

What are the most common owner complaints for the 2021 Acura ILX?

The most reported complaint category for the 2021 Acura ILX is UNKNOWN OR OTHER, with 3 owner reports. That is about 23% of all complaints logged here. Other recurring themes include UNKNOWN OR OTHER, AIR BAGS, ELECTRICAL SYSTEM.

Are complaints about the 2021 Acura ILX a serious warning sign?

Potentially. 4 complaint reports fall into higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components. That does not prove every vehicle has a defect, but repeated complaints in those systems justify a more careful pre-purchase inspection.

How should buyers use complaint data for the 2021 Acura ILX?

Use complaints as an early pattern to investigate, not a standalone verdict. Start with the top complaint categories, compare those themes against the recall report and maintenance guide, then inspect service records for evidence that the same problem areas were already addressed. If the same issue appears repeatedly across complaints and recalls, treat it as a real ownership-risk flag.

Are complaints about the 2021 Acura ILX severe?

4 complaint reports involve higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection before purchase.

Complaint list entries are sourced from owner-submitted NHTSA ODI records.

Read complaint summaries

Acura ILX: How should complaint data influence buying decisions?

Use complaint patterns together with recalls and maintenance guidance to estimate ownership risk and inspection priorities.

Carfocal links complaint data directly to recall and maintenance routes for the same model year.

Return to full vehicle report
Complaint entries
13
Top-topic view
5 grouped topics shown
Primary source
NHTSA ODI owner complaint records

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In this guide

  1. 01Overview
  2. 02Common Problems
  3. 03Owner Complaints
  4. 04Data and Methodology

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