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Mitsubishi · Known Issues

2020 Mitsubishi Mirage Problems: 5 Known Issues

2020 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020 Mitsubishi Mirage has 5 documented known issues, with 1 rated critical. The most serious is CVT Reliability and Longevity Concerns ($2,500-$5,000 repair). Across all issues with published estimates, repair costs range from $80 to $5,000. DIY maintenance guides at au7o.io.

In This Article

  • Mirage Transmission1
  • Mirage HVAC2
  • Mirage Body/Panels1
  • Mirage Suspension1
  • FAQ
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In This Article

  • Transmission1
  • HVAC2
  • Body/Panels1
  • Suspension1
  • FAQ

All 5 Known Issues

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On the 2014-2026 Mitsubishi Mirage 1.2L 3-Cylinder, the Jatco CVT in the Mirage exhibits premature wear and reduced longevity, with some units failing as early as 60,000 miles. The small displacement engine works hard to move the vehicle, putting additional stress on the CVT belt and pulleys.

This issue also affects: Mitsubishi Outlander

Common Symptoms

  • CVT slipping under acceleration
  • Whining noise increasing with speed
  • Hesitation from stop
  • Shudder at highway speeds

How to Fix

Change CVT fluid every 25,000-30,000 miles using Mitsubishi-specified fluid. Avoid full-throttle launches and sustained high-RPM driving. If the CVT begins slipping, replacement is more economical than rebuilding.

Typical repair cost:$2,500 - $5,000

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Community Reported
Medium Confidence

On the 2014-2020 Mitsubishi Mirage 3A92, the Mirage's heater core has very fine, narrow tubes, and it clogs with mineral scale and coolant deposits when the cooling system has been topped off with tap water or with a coolant chemistry that is incompatible with the factory fill. Owners report the heat going progressively weak - characteristically colder on the passenger side than the driver side - even though engine temperature and coolant level are normal. Replacement is labor-intensive because the dashboard, steering column and the steering ECU have to come out to reach the HVAC box.

Common Symptoms

  • Weak or lukewarm heat from the vents in cold weather
  • Passenger side vents noticeably cooler than driver side
  • Heat improves briefly after a coolant flush then fades
  • No overheating and normal coolant level

How to Fix

First try a reverse flush of the heater core with the two heater hoses disconnected at the firewall; a clog will show as almost no flow through one side. Confirm the thermostat is opening and the system has no air pocket before condemning the core. If flushing fails, replace the heater core - budget 4-6 hours of labor since the dash and steering ECU must be removed. Refill only with the correct coolant specification and demineralized water, and never mix coolant types, which is what causes the deposits in the first place.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • A-Premium heater core APHCR116
    OEMA-Premium APHCR116

    Confirmed restricted or leaking heater-core branch for 2014-2015 and 2017-2020 Mirage 1.2L Fitment/availability: The inspected direct page explicitly fits 2014-2015 and 2017-2021 Mirage 1.2L and cross-references the 7801A953 core.

    PartsGeek

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$80 - $900

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Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

On the 2014-2026 Mitsubishi Mirage, the Mirage AC evaporator core develops pinhole leaks from internal corrosion, causing gradual refrigerant loss and reduced cooling performance. The evaporator is located behind the dashboard, making replacement labor-intensive and expensive relative to the vehicle value.

Common Symptoms

  • AC cooling gradually weakening
  • Refrigerant needing annual recharging
  • Musty smell from vents
  • Condensation pooling inside vehicle

How to Fix

Have the AC system leak-tested with UV dye to confirm evaporator failure. Replace the evaporator core, which requires dashboard removal. Add a corrosion inhibitor to the new system to extend evaporator life.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Mitsubishi A/C evaporator core 7801B113
    OEMMitsubishi 7801B113 (replaces 7801A843)

    Confirmed 2014-2019 Mirage evaporator-leak branch Fitment/availability: The inspected official direct product page identifies new genuine Mitsubishi evaporator core 7801B113 for 2014-2019 and supersession of 7801A843. Confirm VIN/product…

    Official Mitsubishi Motors Parts Store

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$600 - $1,500

Research This Issue

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Community Reported
Medium Confidence

On the 2014-2020 Mitsubishi Mirage 3A92, the Mirage is built to an extreme cost target with thin-gauge sheet metal, minimal cavity wax and thin paint, and owners in road-salt regions document a consistent corrosion pattern. The most structurally serious area is the front suspension subframe, whose drain holes let salt-laden slush inside the boxed section where it sits and rusts the structure from the inside out. Also affected: the upper and lower radiator support/crossmember hidden behind the bumper cover, the bumper reinforcement bar and frame rails, door bottom seams, rear wheel arches rusting outward from inside the cavity, fuel tank straps, exhaust hangers, and paint blistering on the floor pan under the carpet. Stone chips spread quickly because the paint film is thin.

Common Symptoms

  • Flaking or perforated metal on the front suspension subframe
  • Rust behind the front bumper cover on the radiator support
  • Bubbling paint along door bottom seams and rear wheel arches
  • Paint blistering on the floor pan under the carpet
  • Rusted fuel tank straps and exhaust hangers
  • Rust spreading rapidly from small stone chips

How to Fix

Have the front subframe, radiator support and fuel tank straps inspected on any salt-belt Mirage before purchase - a rusted-through subframe is a structural condemnation, not a repair. On a sound car, apply a cavity-wax/fluid-film rustproofing treatment inside the subframe, rockers, door bottoms and rear arches, keep the drain holes clear, wash the underbody through winter, and touch up stone chips immediately. Localized surface rust on the radiator support can be wire-wheeled and encapsulated; perforated subframes or arches require welded sections.

Typical repair cost:$150 - $1,500

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2014-2020 Mitsubishi Mirage 3A92, the Mirage/Mirage G4 uses a solid torsion-beam rear axle with no camber or toe adjustment built in. On a significant number of cars the stub axles are welded/positioned slightly off during assembly, so one or both rear wheels sit outside factory toe and/or camber spec straight from the factory. Because nothing on the beam is adjustable, an alignment shop can measure the error but cannot correct it. Owners report chewing through rear tires every 5,000-10,000 miles, with dealers repeatedly declaring the car 'within specs' and Mitsubishi declining goodwill because tires are a wear item. There is no TSB covering it.

Common Symptoms

  • Rear tires worn out in as little as 5,000 miles
  • Uneven or feathered wear on inner or outer rear tire shoulders
  • Steering wheel off-center while driving straight
  • Car feels unstable or wanders at highway speed
  • Alignment shop reports rear toe/camber out of spec with no adjustment available

How to Fix

Get a four-wheel alignment printout documenting the out-of-spec rear toe/camber while still inside the 5-year/60,000-mile basic warranty (this is NOT covered by the 10-year/100,000-mile powertrain warranty). The only correct permanent fix is replacement of the complete rear axle beam assembly (Mitsubishi part 4120A150) - the beam cannot be adjusted and bending the stub axles risks metal fatigue. Re-torquing the beam mounting bolts to spec is worth trying first but rarely fixes a large error. Out of warranty, some owners live with it and simply rotate tires aggressively or fit aftermarket shim plates behind the stub axle flange.

Typical repair cost:$900 - $1,300

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026
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Frequently Asked Questions

What are the most common Mitsubishi Mirage problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020 Mitsubishi Mirage has 5 documented issues. The most frequently reported are: CVT Reliability and Longevity Concerns, Heater Core Clogging Causing Weak or One-Sided Cabin Heat, Front Subframe and Radiator Support Corrosion in Salt-Belt Cars. Of these, 1 is rated critical and should be addressed promptly.

Is the Mitsubishi Mirage reliable?

The 2020 Mitsubishi Mirage has 5 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: CVT Reliability and Longevity Concerns. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mitsubishi Mirage problems?

Repair costs for known Mitsubishi Mirage issues range from $80 to $5,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, CVT Reliability and Longevity Concerns, typically costs $2,500-$5,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2026 Mitsubishi Mirage CVT Reliability and Longevity Concerns?

The Jatco CVT in the Mirage exhibits premature wear and reduced longevity, with some units failing as early as 60,000 miles. The small displacement engine works hard to move the vehicle, putting additional stress on the CVT belt and pulleys. Repairs typically run $2,500-$5,000. Severity: high.

What is the 2014-2020 Mitsubishi Mirage Heater Core Clogging Causing Weak or One-Sided Cabin Heat?

The Mirage's heater core has very fine, narrow tubes, and it clogs with mineral scale and coolant deposits when the cooling system has been topped off with tap water or with a coolant chemistry that is incompatible with the factory fill. Owners report the heat going progressively… Repairs typically run $80-$900. 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.

What is the 2014-2020 Mitsubishi Mirage Front Subframe and Radiator Support Corrosion in Salt-Belt Cars?

The Mirage is built to an extreme cost target with thin-gauge sheet metal, minimal cavity wax and thin paint, and owners in road-salt regions document a consistent corrosion pattern. The most structurally serious area is the front suspension subframe, whose drain holes let salt-l… Repairs typically run $150-$1,500. Severity: medium.

What is the 2014-2020 Mitsubishi Mirage Rear Torsion-Beam Axle Out of Factory Alignment Spec Causing Rapid Rear Tire Wear?

The Mirage/Mirage G4 uses a solid torsion-beam rear axle with no camber or toe adjustment built in. On a significant number of cars the stub axles are welded/positioned slightly off during assembly, so one or both rear wheels sit outside factory toe and/or camber spec straight fr… Repairs typically run $900-$1,300. Severity: medium.

What is the 2014-2026 Mitsubishi Mirage AC Evaporator Core Leak?

The Mirage AC evaporator core develops pinhole leaks from internal corrosion, causing gradual refrigerant loss and reduced cooling performance. The evaporator is located behind the dashboard, making replacement labor-intensive and expensive relative to the vehicle value. Repairs typically run $600-$1,500. Severity: medium.