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Mitsubishi · Known Issues

2018 Mitsubishi Outlander Sport Problems & Issues

2018 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 2018 Mitsubishi Outlander Sport has 6 documented known issues, with 4 rated critical. The most serious are CVT shudder, slipping, and premature failure ($3,000-$5,000 repair), FCM-ECU Software Defect Causes Extended Automatic Braking (Recall 18V620000), Forward Collision Mitigation Recall: Incorrect Brake Hydraulic Unit ECU Software (Recall 18V621) and Underbody and Subframe Rust/Corrosion ($200-$3,000 repair). Across all issues with published estimates, repair costs range from $200 to $5,000. DIY maintenance guides at au7o.io.

In This Article

  • Outlander Sport Safety/Recalls2
  • Outlander Sport Transmission2
  • Outlander Sport Body/Panels1
  • Outlander Sport HVAC1
  • Recalls1
  • FAQ
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In This Article

  • Safety/Recalls2
  • Transmission2
  • Body/Panels1
  • HVAC1
  • Recalls1
  • FAQ

All 6 Known Issues

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ALL YEARS2026202520242023202220212020201920182017201620152014201320122011

On the 2018 Mitsubishi Outlander Sport, if your 2018 Outlander Sport is equipped with the Forward Collision Mitigation system that detects pedestrians, it may be covered by NHTSA recall 18V620000. The FCM electronic control unit was programmed with incorrect software that can command braking for longer than needed -- the system may keep the brakes applied even once a detected pedestrian has left the vehicle's path. NHTSA's concern is the driver's reaction: startled by braking that will not release, the driver may press the pedal further, and the resulting rapid deceleration raises the risk of being struck from behind. The 9,166-unit figure NHTSA lists applies to the entire campaign across several Mitsubishi models, not to the Outlander Sport alone.

Common Symptoms

  • Automatic emergency braking stays engaged longer than expected
  • Braking continues after the pedestrian is no longer in front of the vehicle
  • Harsh, sustained deceleration during an FCM activation

How to Fix

Mitsubishi dealers will reprogram the FCM-ECU with corrected software at no charge under recall campaign SR-18-007 (NHTSA 18V620000); owner notification began October 16, 2018. This is a software flash, so it is typically a short shop visit with nothing to replace. Look up your Outlander Sport's VIN at nhtsa.gov/recalls to see if the recall is open on your specific vehicle, or call Mitsubishi customer service at 1-888-648-7820.

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2018 Mitsubishi Outlander Sport, this recall applies specifically to 2018 Outlander Sport vehicles equipped with the Forward Collision Mitigation (FCM) system. On those cars, the software in the Hydraulic Unit Electronic Control Unit — the module that commands the brake hydraulics — may be the wrong version. With incorrect software installed, a safety system may fail to intervene when it is called on, including automatic emergency braking, Anti-lock Braking (ABS), Electronic Stability Control (ESC), and the Brake Auto Hold function. Nothing about the hardware is defective; it is purely a programming error, so an Outlander Sport can drive normally for years and only reveal the problem at the moment a safety system was supposed to act. Mitsubishi reported 58,916 vehicles across the entire campaign, which also includes other 2017-2018 Mitsubishi models. NHTSA's stated consequence is an increased risk of a crash.

Common Symptoms

  • Forward collision mitigation / automatic emergency braking does not engage when a collision is imminent
  • ABS does not engage during emergency braking
  • Stability control does not intervene in a slide
  • Brake Auto Hold does not function

How to Fix

Dealers reprogram the Hydraulic Unit ECU with the correct software at no cost to the owner. The campaign is Mitsubishi SR-18-008; notifications went out starting October 16, 2018. Since this is a software update rather than a repair you can see, verify it: run your VIN through nhtsa.gov/recalls, and if it still shows open, book the reflash with a Mitsubishi dealer or call MMNA at 1-888-648-7820.

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High ConfidenceVerifiedReviewed Aug 2026

On the 2011-2022 Mitsubishi Outlander Sport, the Jatco-built CVT used across most Outlander Sport years is prone to shuddering, jerking, hesitation when shifting from park to drive/reverse, whining or whirring noise during acceleration, and slipping (engine revs without proportional acceleration). Degraded CVT fluid and belt/chain wear are the primary drivers, and neglected fluid accelerates failure. Powertrain is consistently the most-complained-about area in NHTSA data for this model.

Common Symptoms

  • shuddering or jerking during acceleration
  • hesitation shifting into drive or reverse
  • whining or whirring noise
  • RPM rises but car does not accelerate (slipping)

How to Fix

Replace CVT fluid on a shortened interval (roughly every 30,000-60,000 miles rather than 'lifetime'). Persistent shudder may require a valve body or full CVT replacement. Earlier model years had a separate recall (16V-563) for a CVT control module causing delayed gear engagement.

What you need to fix it

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

  • Genuine Mitsubishi CVTF-J4 transmission fluid, 1 quart (MZ321212)

    Do not use this link to override a 2011 CVTF-J1 label/specification, and do not substitute ATF; verify required quantity and service procedure before ordering.

    Mitsubishi Motors Parts & Accessories 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:$3,000 - $5,000

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2011-2026 Mitsubishi Outlander Sport, the Outlander Sport CVT develops a judder during low-speed acceleration and deceleration. The transmission hesitates when pulling away from stops, and the simulated shift points feel rough and inconsistent.

Common Symptoms

  • Judder during light acceleration
  • Hesitation from stop
  • Rough simulated shift points
  • CVT whining noise

How to Fix

Replace the CVT fluid with Mitsubishi DiaQueen CVTF-J4 every 30,000 miles. A TCM reprogram may smooth out the shift calibration. Avoid towing with the CVT-equipped models.

Typical repair cost:$200 - $4,000

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High Confidence

On the 2011-2020 Mitsubishi Outlander Sport, the Outlander Sport is susceptible to accelerated underbody rust and corrosion, particularly in salt-belt states. The rear subframe, fuel tank straps, and brake lines are the most affected areas, with rust perforation occurring in as little as 5-7 years.

Common Symptoms

  • Visible rust on underbody components
  • Brake line corrosion
  • Rear subframe structural weakness
  • Fuel tank strap deterioration

How to Fix

Apply rust-proofing undercoating annually in salt-belt areas. Inspect the rear subframe for structural integrity during routine maintenance. Replace corroded brake lines with stainless steel or coated replacements.

Typical repair cost:$200 - $3,000

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Community Reported
High Confidence

On the 2011-2020 Mitsubishi Outlander Sport, the AC compressor in the Outlander Sport frequently fails between 50,000 and 80,000 miles. The compressor clutch bearing seizes or the internal reed valves break, contaminating the AC system with metal debris.

This issue also affects: Mitsubishi Endeavor, Mitsubishi Outlander

Common Symptoms

  • AC not cooling
  • Loud clicking from compressor
  • Intermittent AC function
  • Refrigerant leak

How to Fix

Replace the AC compressor, receiver/drier, and expansion valve. Flush the entire system to remove metal particles. Install an inline filter on the liquid line to protect the new compressor from residual debris.

What you need to fix it

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

  • BuyAutoParts five-piece complete A/C kit 61-89343R6
    OEMBuyAutoParts 61-89343R6

    Confirmed compressor-replacement/contamination branch for 2011-2013 Outlander Sport Fitment/availability: The inspected direct U.S. page explicitly fits 2011-2013 Outlander Sport and supplies new compressor with clutch, condenser with dr…

    BuyAutoParts

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 - $1,400

Research This Issue

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Community Reported
High Confidence
NHTSA Recalls1 recall

POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE

Mitsubishi Motors North America, Inc. (MMNA) is recalling certain 2019-2022 Outlander Sport vehicles equipped with continuously variable transmissions and mechanical key ignition systems. A software error in the transmission control unit (CVT-ECU) may incorrectly reduce the transmission gear ratio at high speeds, which can result in an engine stall.

Campaign #22V56300002/08/2022

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Other Mitsubishi Models

Mitsubishi Outlander26Mitsubishi Eclipse17Mitsubishi Galant9Mitsubishi 3000GT9Mitsubishi Endeavor9Mitsubishi Mirage7

Frequently Asked Questions

What are the most common Mitsubishi Outlander Sport problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2018 Mitsubishi Outlander Sport has 6 documented issues. The most frequently reported are: CVT shudder, slipping, and premature failure, FCM-ECU Software Defect Causes Extended Automatic Braking (Recall 18V620000), Forward Collision Mitigation Recall: Incorrect Brake Hydraulic Unit ECU Software (Recall 18V621). Of these, 4 are rated critical and should be addressed promptly.

Is the Mitsubishi Outlander Sport reliable?

The 2018 Mitsubishi Outlander Sport has 6 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 4 issues are rated critical: CVT shudder, slipping, and premature failure and FCM-ECU Software Defect Causes Extended Automatic Braking (Recall 18V620000) and Forward Collision Mitigation Recall: Incorrect Brake Hydraulic Unit ECU Software (Recall 18V621) and Underbody and Subframe Rust/Corrosion. 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 Outlander Sport problems?

Repair costs for known Mitsubishi Outlander Sport issues range from $200 to $5,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, CVT shudder, slipping, and premature failure, typically costs $3,000-$5,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2011-2022 Mitsubishi Outlander Sport CVT shudder, slipping, and premature failure?

The Jatco-built CVT used across most Outlander Sport years is prone to shuddering, jerking, hesitation when shifting from park to drive/reverse, whining or whirring noise during acceleration, and slipping (engine revs without proportional acceleration). Degraded CVT fluid and bel… Repairs typically run $3,000-$5,000. Severity: high.

What is the 2018 Mitsubishi Outlander Sport FCM-ECU Software Defect Causes Extended Automatic Braking (Recall 18V620000)?

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.

If your 2018 Outlander Sport is equipped with the Forward Collision Mitigation system that detects pedestrians, it may be covered by NHTSA recall 18V620000. The FCM electronic control unit was programmed with incorrect software that can command braking for longer than needed -- t… Severity: high.

What is the 2018 Mitsubishi Outlander Sport Forward Collision Mitigation Recall: Incorrect Brake Hydraulic Unit ECU Software (Recall 18V621)?

This recall applies specifically to 2018 Outlander Sport vehicles equipped with the Forward Collision Mitigation (FCM) system. On those cars, the software in the Hydraulic Unit Electronic Control Unit — the module that commands the brake hydraulics — may be the wrong version. Wit… Severity: high.

What is the 2011-2020 Mitsubishi Outlander Sport Underbody and Subframe Rust/Corrosion?

The Outlander Sport is susceptible to accelerated underbody rust and corrosion, particularly in salt-belt states. The rear subframe, fuel tank straps, and brake lines are the most affected areas, with rust perforation occurring in as little as 5-7 years. Repairs typically run $200-$3,000. Severity: high.

What is the 2011-2020 Mitsubishi Outlander Sport AC Compressor Premature Failure?

The AC compressor in the Outlander Sport frequently fails between 50,000 and 80,000 miles. The compressor clutch bearing seizes or the internal reed valves break, contaminating the AC system with metal debris. Repairs typically run $600-$1,400. Severity: medium.

What is the 2011-2026 Mitsubishi Outlander Sport CVT Judder and Hesitation?

The Outlander Sport CVT develops a judder during low-speed acceleration and deceleration. The transmission hesitates when pulling away from stops, and the simulated shift points feel rough and inconsistent. Repairs typically run $200-$4,000. Severity: medium.