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Mazda · Known Issues

2017 Mazda Mazda3 Problems: 2 Known Issues

2017 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2017 Mazda Mazda3 has 2 documented known issues. None of the listed issues is rated critical; this is not a complete reliability assessment. Across all issues with published estimates, repair costs range from $300 to $1,800. DIY maintenance guides at au7o.io.

In This Article

  • Mazda3 Suspension1
  • Mazda3 Electrical1
  • Recalls9
  • FAQ
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In This Article

  • Suspension1
  • Electrical1
  • Recalls9
  • FAQ

All 2 Known Issues

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On the 2014-2018 Mazda Mazda3, third-generation Mazda3 models with the torsion beam rear suspension develop worn rear axle bushings that cause a vague, wandering rear end and clunking over bumps. The rubber bushings deteriorate from road salt, UV exposure, and age, allowing excess play in the rear axle. This affects handling precision and rear tire alignment, leading to inner-edge tire wear.

This issue also affects: Mazda Mazda6

Common Symptoms

  • Clunking from rear over bumps
  • Rear-end wandering feel at highway speed
  • Inner-edge rear tire wear
  • Loose feeling in rear end during lane changes
  • Popping noise when backing up and turning

How to Fix

Replace the rear torsion beam bushings. The bushings must be pressed out and new ones pressed in, requiring a hydraulic press. Some owners replace the entire torsion beam assembly with a used unit if the bushings are severely deteriorated. Perform a rear alignment after bushing replacement. Polyurethane bushing upgrades are available for improved longevity.

Typical repair cost:$300 - $700

Research This Issue

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Community Reported
Medium Confidence

On the 2014-2018 Mazda Mazda3, on i-ELOOP equipped BM/BN Mazda3s, regenerative braking energy is stored in an electric double-layer capacitor mounted in the engine bay and fed back to the 12V system through a DC-DC converter. The capacitor develops an internal open circuit, or the DC-DC converter fails, and the PCM sets P1794 with an 'i-ELOOP Malfunction' message in the instrument cluster plus the master warning and battery/charging lights. Because the DC-DC converter also supplies the 12V system when i-ELOOP is active, a failure can leave the alternator carrying everything, run the battery down and disable i-stop. Mazda also issued a service bulletin for false i-ELOOP faults triggered when the accessory belt gets wet in heavy rain or deep water, so a wet-weather-only warning is not necessarily a dead capacitor.

Common Symptoms

  • 'i-ELOOP Malfunction' message in the instrument cluster
  • Charging system / battery warning light on
  • Master warning light illuminated
  • i-stop stops working
  • Repeated dead or weak 12V battery

How to Fix

Pull the exact DTC and sub-code first. If the fault only appears in heavy rain or after driving through water, check for the applicable PCM reprogramming bulletin and inspect the accessory belt and pulleys for slip before condemning hardware. For a hard, repeatable fault, test the capacitor unit and the DC-DC converter separately - the capacitor assembly and the converter are separate parts and shops frequently replace the wrong one. Also verify the 12V battery and grounds, since a weak battery can mimic i-ELOOP faults and disable i-stop.

Typical repair cost:$600 - $1,800

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls9 recalls

VISIBILITY:WINDSHIELD WIPER/WASHER

Mazda North American Operations (Mazda) is recalling certain 2016-2018 Mazda3 vehicles. A defective windshield wiper relay may cause the windshield wipers to become inoperative, reducing the driver's visibility.

Campaign #19V27200004/04/2019

BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

Mazda North American Operations (Mazda) is recalling certain 2014-2018 Mazda3 and 2016-2021 CX-3 vehicles. The rearview camera image may not display properly by showing a flickering or distorted image.

Campaign #23V48700014/07/2023

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3 vehicles, equipped with an incorrect exhaust valve spring. The incorrect exhaust valve spring may fail while driving, potentially causing an engine stall.

Campaign #17V74500021/11/2017
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Other Mazda Models

Mazda CX-530Mazda CX-6027Mazda CX-5026Mazda MX-5 Miata22Mazda MX-621Mazda CX-7019

Frequently Asked Questions

What are the most common Mazda Mazda3 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2017 Mazda Mazda3 has 2 documented issues. The most frequently reported are: Rear Torsion Beam Bushing Deterioration, 2014-2018 Mazda3 i-ELOOP Capacitor / DC-DC Converter Failure - Charging System Warning and P1794. None are rated critical, but regular maintenance is recommended.

Is the Mazda Mazda3 reliable?

The 2017 Mazda Mazda3 has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mazda Mazda3 problems?

Repair costs for known Mazda Mazda3 issues range from $300 to $1,800, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2018 Mazda Mazda3 Rear Torsion Beam Bushing Deterioration?

Third-generation Mazda3 models with the torsion beam rear suspension develop worn rear axle bushings that cause a vague, wandering rear end and clunking over bumps. The rubber bushings deteriorate from road salt, UV exposure, and age, allowing excess play in the rear axle. This a… Repairs typically run $300-$700. Severity: medium.

What is the 2014-2018 Mazda Mazda3 2014-2018 Mazda3 i-ELOOP Capacitor / DC-DC Converter Failure - Charging System Warning and P1794?

On i-ELOOP equipped BM/BN Mazda3s, regenerative braking energy is stored in an electric double-layer capacitor mounted in the engine bay and fed back to the 12V system through a DC-DC converter. The capacitor develops an internal open circuit, or the DC-DC converter fails, and th… Repairs typically run $600-$1,800. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3, Mazda6, 2019 CX-3, 2018-2019 MX-5, CX-5, CX-9, and 2019-2020 Mazda2 vehicles. The impeller inside the low-pressure fuel pump may crack and deform, potentially causing the fuel pump to fail.

Campaign #21V87500012/11/2021

FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

Mazda Motors North American Operations (Mazda) is recalling certain model year 2014-2016 Mazda3 vehicles manufactured January 4, 2014, to September 18, 2015. The fuel tank of the affected vehicles may have been improperly handled during manufacturing and, as a result, the welded attachment of the Inlet Check Valve (ICV) may fail and allow fuel to leak.

Campaign #16V68400022/09/2016

+ 4 more recalls. Check all on NHTSA.gov

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