Owners of 2014 Q50s report recurring steering failures that Infiniti has not fixed despite multiple recalls and software updates. The most common issue: steering pulls hard to one side (usually left) on straight, level roads, sometimes almost causing head-on collisions. It stops as abruptly as it starts, then happens again days later. Drivers describe the wheel actively turning or fighting their input—not an alignment problem.
Cold weather triggers power steering failures where the steering becomes rock-hard and unresponsive after startup, especially below zero. Warning lights (power steering, chassis control, vehicle dynamic control) illuminate. Turning the car off and back on, or waiting for engine warmth, sometimes clears it—then it recurs. A few owners report steering wheel completely locks at startup, wheels unresponsive.
The newer Direct Adaptive Steering (DAS) steer-by-wire system has its own defects. When it fails, the backup mode engages but requires abnormally high steering effort—harder to turn than a car with power steering completely off, making the vehicle unsafe for weaker drivers. Some owners say the system steers on its own or drifts without input; others report the car pushes toward freeway exits.
Dealers often claim they cannot reproduce the problem and send owners home. When fixes are attempted—software updates, steering module replacement, servo-actuator replacement, recalibration—the issues recur within days or weeks. Multiple owners report visiting dealerships 3–4+ times for the same fault. Some vehicles are excluded from recalls despite exhibiting identical symptoms to recalled models. One owner was told to stop touching the steering wheel before startup, as if driver behavior caused an electronic malfunction.
Failure modes owners describe
Unintended steering pull or drift (autonomous steering)
Steering pulls strongly to one side (usually left, sometimes right) on level roads at any speed, requiring constant correction. Occurs intermittently and without warning, lasting minutes to hours then stopping, then recurring. Differs from alignment issues; car feels like it's fighting the driver. Also described as car 'turning by itself' or veering into lanes.
When: Occurs at random times, on straight roads and highways; some reports note early morning or after parking
Symptoms owners cite: Car pulls left or right with significant force, nearly causing head-on collisions; Steering wheel actively moves or resists driver input; Intermittent onset and cessation without pattern; Requires firm wheel correction to maintain straight line; Passengers notice the erratic behavior
Codes mentioned: Steering error lights, Traction control error lights, Chassis control system error messages
Repairs/costs cited: Dealers often cannot reproduce issue; attempts include software updates, steering control system replacement, recalibration, and DAS full replacement. Repairs frequently unsuccessful.
Recalls/TSBs owners mention: Software updates issued; recalls including 13V588000 (steering); calibration updates. Infiniti initially downplayed scope (claimed only 3 cars affected while dealers received multiple calls same day). Multiple service campaigns.
Power steering failure (loss of assist)
Power steering abruptly stops working, making steering extremely stiff and difficult to turn. Steering wheel becomes very heavy. Often accompanied by warning lights. Stops after restart or after car runs for 5-7 minutes. Happens repeatedly.
When: Often in cold weather (below 0–20°F) after startup or after parking; also occurs in above-freezing conditions. Reported at low mileage (200–3600 miles) and at higher mileage (89,000+ miles).
Symptoms owners cite: Complete loss of power steering assist; Steering wheel extremely stiff and difficult to turn; Warnings: power steering light, chassis control error, vehicle dynamic control light, master warning; Condition clears after restart or engine warmth; Intermittent recurrence
Codes mentioned: Power steering warning light, Chassis control system error, Vehicle dynamic control error, Master warning lights
Repairs/costs cited: Dealers applied software updates; replaced steering control modules; replaced power steering modules; replaced servo-actuators. Repair costs cited up to $1600. Often marked as 'not covered' under standard warranty.
Recalls/TSBs owners mention: Recalls 13V588000 and related steering recalls; software updates released (e.g., after customer complaints in 2013–2014); some dealers claimed vehicle not covered by recall despite identical symptoms. Extended warranty repairs sometimes denied.
Steering wheel lock-up or stiffness (non-responsive steering)
Steering wheel becomes locked or extremely stiff, preventing the driver from turning it. Wheels do not respond to steering wheel input. Occurs at startup or while backing. Accompanied by warning lights. Clearing requires restart and engine warm-up.
When: In cold weather (below 0°F, around 20°F); after parking, especially in outdoor lots; at very low mileage (200–704 miles); one instance at 46°F
Symptoms owners cite: Steering wheel will not turn or turns only a few degrees despite firm pressure; Car wheels do not respond to steering wheel movement; Steering wheel locked in position (e.g., left turn position); Warning lights: steering wheel with exclamation mark, car with wheel skid marks, suspension malfunction, power steering warning; Issue resolves after restart and engine warmup (20–30 minutes)
Codes mentioned: Steering wheel warning light, Suspension malfunction warning, Power steering warning, Vehicle dynamic control error
Repairs/costs cited: Dealers diagnosed chassis control module failure, servo-actuator failure; replaced steering modules, servo motors, and control units (some dealers claim replacement not required by warranty). Repair costs ~$1600. Some owners' vehicles towed; issue persists post-repair.
Recalls/TSBs owners mention: Software updates provided; recalls 13V588000 and related steering/electronic power assist recalls (described as addressing freezing climate power steering loss). Some vehicles excluded from recalls despite matching symptoms.
DAS (Direct Adaptive Steering) system malfunction with stiff/unresponsive steering
DAS steer-by-wire system fails in both active and fail-safe modes. In failure mode, steering effort is abnormally high—substantially exceeding normal manual (non-powered) steering effort, making vehicle unsafe or undriveable. System does not engage redundancy/backup as designed. Calibration drifts continuously.
When: Since cold weather onset (early December); at startup; in warm weather during straight driving; intermittent recurrence
Symptoms owners cite: Steering error and traction control error lights at startup; Steering extremely stiff and difficult to operate; Fail-safe mode engages but steering effort exceeds engineered baseline; Substantial design defect: steering effort higher in DAS fail-safe than with electrical power completely off; System does not engage backup redundancy when faults occur; Drivers of low strength unable to control vehicle; Issue persists despite recalibration
Codes mentioned: Steering error light, Traction control error light, DAS system fault codes
Repairs/costs cited: Dealers recalibrated system repeatedly; issue persists. Owners report vehicle returned to shop multiple times. No effective repair documented.
Recalls/TSBs owners mention: DAS acknowledged as new technology; system recalibration offered; software fixes suggested to correct 'lack of triple redundancy.' Infiniti acknowledged servo-actuators require sealing/replacement, not just grease application. No comprehensive field fix implemented.
Active lane control/DAS veering behavior (lane departure assist malfunction)
Vehicle drifts to left and/or right on freeways without driver input. DAS does not feel tight or safe. Constantly requires correction. Lane departure system appears to push vehicle toward exits or off its intended lane. One Motor Trend long-term test vehicle reported active lane control causing unintended veering toward freeway exits.
When: On freeways and highways during straight driving; intermittent
Symptoms owners cite: Vehicle drifts left and right on highway; DAS feels loose and unsafe; Requires constant driver correction; Active lane control pushes car toward exits; Lane departure warning system malfunction (one case)
Codes mentioned: Lane departure system warning, DAS drift/calibration codes (not explicitly listed in narratives)
Repairs/costs cited: Toe alignment corrected at one dealership (toe found 3 degrees out at 3149 miles) but problem persisted post-alignment. Dealers unable to remedy.
Recalls/TSBs owners mention: No specific response documented beyond acknowledgment that lane departure malfunction and DAS are related to prior recalls for electric power assist and adaptive steering parts. Not explicitly included in earlier recalls per owner assertion.
Steering calibration loss (DAS calibration drift)
DAS system loses calibration, causing steering to turn without steering wheel input or become uncontrollable. Faults do not register; backup steering system does not engage because fault is not triggered. Recalibration does not hold. Car becomes undriveable and unsafe.
When: From startup and in motion; both city and highway; most during warm weather; recurring despite multiple recalibrations
Symptoms owners cite: Car steers (turns) without steering wheel being turned; Calibration loss continuous and recurring; Faults and errors do not register in system; Backup steering system does not engage as designed; Vehicle becomes undriveable
Codes mentioned: No specific codes; system faults do not register
Repairs/costs cited: Dealers recalibrate system; calibration loss continues. No permanent fix achieved.
Recalls/TSBs owners mention: Recalibration offered; no long-term solution provided.
Steering response delay and soft/vague feedback
Steering feels loose, has abnormal knocking sounds, or column can be manually moved beneath wheel. Steering wheel feels disconnected from wheels. May be accompanied by stepped feedback when turning.
When: At any speed; intermittent; one case at 73,850 miles
Symptoms owners cite: Steering wheel loose or abnormal knocking when turning; Steering column manually movable from underneath steering wheel; Stepped feedback in steering feel for 20–30 seconds after certain maneuvers; Abrupt stop/thud when turning wheel quickly, followed by more effort required
Codes mentioned: C1130, C1138
Repairs/costs cited: Independent mechanic suggested failure related to steering column but detailed inspection needed. Dealer did not diagnose or repair.
Recalls/TSBs owners mention: Dealer contacted but vehicle not diagnosed or repaired.
Synthesized from 78 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.