The 2018 Outlander PHEV is a complex plug-in hybrid with a 2.0L Atkinson-cycle engine, dual electric motors, and a unique single-speed transmission. When the hybrid system works, it's efficient and capable, but catastrophic engine failures and cooling system issues plague this generation far more than typical crossovers.
Symptoms: sudden loss of power under load, metallic knocking or ticking from engine bay, check engine light with misfire codes, excessive oil consumption (1 qt per 1,000 mi or worse), white or blue smoke from exhaust
Fix: Engine requires complete rebuild or replacement due to piston ring failure, bearing wear, or crankshaft damage. This is NOT a simple fix—expect 18-24 hours labor for short block replacement or full rebuild. Parts often backordered. Root cause appears to be lubrication issues combined with direct-injection carbon buildup and thermal stress from hybrid cycling.
Estimated cost: $8,000-14,000
Transmission Oil Cooler Failure and Contamination
Common · high severity
Typical onset: 50,000-90,000 mi
Symptoms: transmission slipping or shuddering during EV-to-engine transition, milky or discolored transmission fluid, overheating warnings on dashboard, loss of drive power in hybrid mode, coolant mixing with ATF if cooler ruptures internally
Fix: The transmission oil cooler is integrated into the cooling system and prone to internal leaks that cross-contaminate coolant and ATF. Requires cooler replacement, complete fluid flush of both systems, and often transmission filter/pan service. Critical to catch early—contaminated fluid destroys clutches and pumps. 6-8 hours labor.
Estimated cost: $1,800-3,200
Liftgate Strut Failure and Hatch Alignment Issues
Common · low severity
Symptoms: liftgate falls closed unexpectedly, struts hiss or leak oil, hatch sits crooked when closed, difficulty opening or closing power liftgate, water leaks into cargo area after car wash
Fix: Factory struts are undersized for the heavy PHEV hatchback (battery adds weight). Struts fail early, and mounting brackets crack over time. NHTSA recalls covered some VINs but not all. Replace both struts as a pair with heavy-duty aftermarket units, realign hatch if needed. 1.5-2 hours labor.
Estimated cost: $350-650
12V Battery Drain and Hybrid System Lock-Out
Common · medium severity
Symptoms: vehicle won't enter READY mode even with high-voltage battery charged, constant dead 12V battery despite replacement, clicking from under hood, no start, warning lights: 'EV System Service Required', parasitic draw kills battery in 3-5 days of sitting
Fix: The PHEV relies on a small 12V AGM battery to boot the hybrid control system—it's not just for starting. DC-DC converter failures, faulty body control modules, and always-on telematics drain it. Diagnosis requires measuring parasitic draw (should be under 50mA). Often needs DC-DC converter replacement or BCM software reflash. 2-4 hours diagnostic + repair labor.
Estimated cost: $800-1,800
Adaptive Cruise Control / Forward Collision Sensor Failures
Occasional · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: FCM unavailable warning on dash, adaptive cruise won't engage, false automatic emergency braking events, radar sensor fault codes, cruise control cuts out randomly on highway
Fix: Front radar module behind the Mitsubishi badge is sensitive to moisture intrusion and road salt. One NHTSA recall addressed software, but hardware failures still occur. Requires radar unit replacement and recalibration using dealer-level scan tool (independent shops often can't do this). 2 hours labor + dealer calibration fee.
Estimated cost: $1,200-2,000
Transmission Mounts Deteriorating Prematurely
Common · low severity
Typical onset: 50,000-90,000 mi
Symptoms: clunking when shifting from Park to Drive, vibration at idle with AC on, harsh engagement when engine kicks in to assist electric motors, visible sagging or torn rubber on mount inspection
Fix: The single-speed transmission and twin-motor setup create unique torque pulses that beat up the mounts faster than conventional drivetrains. Front and rear transmission mounts fail first. Straightforward replacement but requires supporting the drivetrain. 2-3 hours labor for both mounts.
Estimated cost: $450-750
Owner tips
Change transmission fluid every 30,000 mi regardless of 'lifetime fluid' claims—contamination from the cooler is a ticking time bomb.
Inspect coolant and ATF color at every oil change; any pink in the coolant or brown in the ATF means immediate cooler replacement.
Use only Mitsubishi-spec 0W-20 synthetic oil and change every 5,000 mi to combat direct-injection carbon and protect fragile bearings.
Keep the 12V battery on a trickle charger if the vehicle sits more than a week—parasitic draw is real.
Budget $500-1,000/year for unexpected hybrid system repairs beyond normal maintenance starting at 60k miles.
Buy only if you can afford a potential $10k+ engine replacement and have access to a Mitsubishi-certified shop for hybrid diagnostics—great efficiency when it works, but catastrophic failures are too common to ignore.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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Mitsubishi Motors North America, Inc. (MMNA) is recalling certain 2018-2022 Outlander PHEV and 2014-2020 Outlander vehicles. The liftgate gas spring cylinders may corrode and lose pressure, which can result in a gas spring cylinder rupture or the liftgate falling unexpectedly.
Consequence: A gas spring cylinder rupture or a liftgate falling unexpectedly can increase the risk of injury.
Remedy: MMNA will replace the left and right liftgate gas springs, free of charge. Owner notification letters are expected to be mailed June 17, 2026. Owners may contact MMNA customer service at 1-888-648-7820. MMNA's number for this recall is SR-26-001. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov June 3, 2026. This recall expands previous NHTSA recall number 25V507.
Mitsubishi Motors North America, Inc. (MMNA) is recalling certain 2018-2022 Outlander PHEV and 2014-2020 Outlander vehicles sold and/or currently registered in Alaska, Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, West Virginia, and Wisconsin.
The liftgate gas spring cylinders may corrode and lose pressure, which can result in a gas spring cylinder rupture or the liftgate falling unexpectedly.
Consequence: A gas spring cylinder rupture or a liftgate falling unexpectedly can increase the risk of injury.
Remedy: MMNA will replace the left and right liftgate gas springs, free of charge. Owner notification letters were mailed October 6, 2025. Owners may contact MMNA customer service at 1-888-648-7820. MMNA's number for this recall is SR-25-002
Mitsubishi Motors North America, Inc. (MMNA) is recalling certain 2014-2019 Outlander and 2018-2019 Outlander PHEV vehicles. The second-row center seat belt buckle may interfere with the right-side seat belt buckle when the seat backs are folded down. The interference may cause the right-side seat belt buckle cover to come off, making the buckle latch inoperable and unable to restrain an occupant.
Consequence: An unrestrained occupant has an increased risk of injury in the event of a crash.
Remedy: MMNA will notify owners, and dealers will modify the second-row center seat belt buckle cover, install a new warning label to the second-row seat support base, and provide a new warning label insert for the owner's manual, free of charge. The recall began September 1, 2020. Owners may contact MMNA customer service at 1-888-648-7820. Mitsubishi's number for this recall is SR-20-004.
ELECTRICAL SYSTEM:SOFTWARE · 18V620000
2018-09-14
Mitsubishi Motors North America (MMNA) is recalling certain 2018 Mitsubishi Outlander PHEV, Outlander Sport, 2018-2019 Eclipse Cross, and 2017-2018 Outlander vehicles equipped with a Forward Collision Mitigation (FCM) system that detects pedestrians. Due to incorrect software, the FCM-ECU (Electronic Control Unit) may apply braking for longer than needed, even after a pedestrian is no longer detected.
Consequence: If the FCM-ECU software activates the brake for longer than necessary, the driver may react by applying additional braking. The resulting rapid deceleration of the vehicle can increase the risk of a rear-end collision.
Remedy: MMNA will notify owners, and dealers will reprogram the FCM-ECU software with updated software, free of charge. The recall is began October 16, 2018. Owners may contact MMNA customer service at 1-888-648-7820. MMNA's number for this recall is SR-18-007.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL · 18V621000
2018-09-14
Mitsubishi Motors North America, Inc. (MMNA) is recalling certain 2018 Mitsubishi Outlander Sport vehicles equipped with a Forward Collision Mitigation (FCM) system and 2018 Mitsubishi Outlander PHEV and Eclipse Cross vehicles and 2017-2018 Outlander vehicles equipped with an Adaptive Cruise Control (ACC) system and/or an Electric Parking Brake (EPB) system. The software for the Hydraulic Unit Electronic Control Unit (ECU) may be incorrect, possibly preventing the intervention of a safety system such as automatic emergency braking, Anti-lock Braking (ABS), Electronic Stability Control (ESC), or the Brake Auto Hold (BAH) function when any of these systems are in use.
Consequence: If the safety systems do not function as intended, it can increase the risk of a crash.
Remedy: MMNA will notify owners, and dealers will update the Hydraulic Unit-ECU software, free of charge. The recall began October 16, 2018. Owners may contact MMNA customer service at 1-888-648-7820. MMNA's number for this recall is SR-18-008.
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