2021 Mitsubishi Outlander Problems: 7 Known Issues

On the 2014-2022 Mitsubishi Outlander, the steel cylinder of each tailgate gas spring is protected only by a heat-shrink resin sleeve. Salt water works its way under the spring's dust cap, sits against the bare cylinder wall and corrodes it. Because the cylinder holds high-pressure gas, a corroded wall can either lose pressure — so the liftgate no longer holds itself up and falls on whoever is loading the cargo area — or rupture outright. Mitsubishi first recalled 91,697 vehicles in 28 salt-belt states plus DC in 2025 (25V507 / SR-25-002), then expanded the campaign nationwide in April 2026 to 108,046 vehicles after finding corrosion outside the salt belt.

On the 2014-2021 Mitsubishi Outlander, the panoramic/power sunroof tray is not sealed — it is designed to catch water and route it out through four drain hoses, two down the A-pillars and two down the rear quarter panels. The front hoses exit behind the front inner fender liners, where road spray packs them with grit, and the tray corners collect pollen and tree debris. Once a hose blocks, the tray overflows at the corner and the water goes where it wants: down the A-pillar trim onto the front carpet, out through the headliner leaving brown stains, or into the B-pillar. Owners frequently discover it after a touch-free car wash or the first heavy rain. Because the water lands on floor-mounted electrical connectors and modules, a neglected drain turns into a much larger electrical bill.

On the 2014-2022 Mitsubishi Outlander, the PHEV blends friction braking with motor regeneration through the RBS control unit, which cross-checks wheel speed sensors, the brake stroke sensor and the motor controllers. If any of those inputs disagrees — most commonly a failing rear wheel speed sensor, but also a dragging caliper that makes actual deceleration exceed what the system commanded — the RBS unit faults out. Owners on the PHEV forum describe the RBS warning appearing on a long descent, followed immediately by 'safe mode' with no acceleration available, sometimes accompanied by an 'EV system service required' message after running on the engine. The car still stops (friction brakes remain), but the sudden loss of drive on a grade or in traffic is the safety concern.

On the 2014-2021 Mitsubishi Outlander, the PHEV isolates its CHAdeMO fast-charge port from the traction pack with quick-charge contactors. An abnormal-current event during a DC fast charge session — a station that drops or spikes current, or a handshake that aborts mid-session — can weld the negative quick-charge contactor closed. Once welded, the EV-ECU can no longer prove the fast-charge circuit is isolated, so it sets P101C and throws 'EV system service required'; owners on the PHEV forum report the fault appearing immediately after a fast charge, sometimes with the charging station itself reporting 'failure to communicate with vehicle'. AC (Type 1/Type 2) charging often still works, which is what makes people mis-blame the charge point rather than the car.

On the 2018-2026 Mitsubishi Outlander 2.4L PHEV, the Outlander PHEV can experience accelerated battery capacity degradation and intermittent charging failures. The battery management system occasionally refuses to initiate charging or terminates sessions prematurely, particularly in extreme temperatures.

On the 2018-2022 Mitsubishi Outlander, mMNA Tech Talk 266 (February 2022) reports some US-market PHEVs with reduced or absent cabin heat and material blocking an inline filter. The bulletin lists no model years, and it does not identify the material as crystallized coolant, prescribe a failure mileage, or establish valve/pump failure from the symptom.

On the 2014-2026 Mitsubishi Outlander, the Outlander develops front suspension clunking and knocking noises over bumps and rough roads. Worn front stabilizer bar end links and strut mount bearings are the primary culprits, with noise appearing as early as 30,000 miles.