The 2019 MDX with the 3.5L V6 is generally reliable, but suffers from a known catastrophic piston ring defect that can destroy engines between 60k-100k miles. Beyond that, transmission cooler lines and mounts are the next most frequent issues.
Symptoms: Excessive oil consumption (1+ quart per 1,000 miles), Blue smoke from exhaust on cold start or acceleration, Rough idle, misfires on deactivating cylinders, Check engine light with P0300-series misfire codes
Fix: Honda's Variable Cylinder Management (VCM) system causes premature piston ring wear on cylinders 1, 4, and 6. Requires complete engine teardown: new pistons, rings, honing cylinders, and often crank/bearing work if oil starvation damaged bearings. Factory extended warranty covered some cases through 2021, but out-of-pocket repairs are brutal. 25-35 labor hours for short block replacement or rebuild. Some owners disable VCM with aftermarket tuning to prevent recurrence.
Estimated cost: $6,000-10,000
Transmission Oil Cooler Line Leaks
Common · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Transmission fluid pooling under vehicle, passenger side front, Low transmission fluid warning light, Harsh shifting or slipping if fluid gets too low, Pink/red fluid visible on driveway
Fix: The quick-connect fittings where cooler lines attach to the radiator or remote cooler crack or corrode. Honda redesigned these twice but early 2019s got the weak version. Replace both cooler lines and fittings as a set, flush transmission, refill with DW-1 fluid. 2.5-3.5 hours labor. Do NOT drive if leaking actively—transmission damage occurs fast.
Estimated cost: $450-750
Front Engine/Transmission Mount Failure
Common · low severity
Typical onset: 80,000-130,000 mi
Symptoms: Clunk or thud on takeoff or when shifting into drive/reverse, Vibration at idle, worse with A/C on, Excessive engine movement visible when revving in park
Fix: Hydraulic front mount (upper torque damper) separates internally, losing its dampening fluid. This is a wear item on all transverse V6 Hondas/Acuras but the MDX's weight accelerates it. Replace front and transmission mounts together for best results. 3-4 hours labor for both. OEM mounts recommended—aftermarket versions fail quicker.
Estimated cost: $600-900
Fuel Pump Failure (Recall 20V-750)
Occasional · high severity
Symptoms: No-start condition, engine cranks but won't fire, Intermittent stalling at any speed, Hesitation or stumbling under load, Fuel pump whine audible from rear seat area before complete failure
Fix: Denso-supplied low-pressure fuel pump impellers crack due to manufacturing defect. Recall covers replacement, but pumps can fail before owner gets notice. If out of recall eligibility, pump replacement requires dropping fuel tank. 2-3 hours labor. Always check if recall was performed when buying used—VIN lookup on NHTSA site.
Symptoms: Shudder or vibration during light acceleration, 20-50 mph, Hesitation on 2-3 or 3-4 upshifts, Feels like driving over rumble strips when maintaining steady throttle
Fix: Torque converter lockup clutch develops glazing or the transmission control software hunts between gears. Honda/Acura issued multiple software updates (check for TSB 18-057). If software doesn't fix it, torque converter replacement needed. 8-10 hours labor to drop transmission and R&R converter. Fluid flush with Honda DW-1 sometimes helps temporarily.
Symptoms: Brake dragging, wheel hot to touch after driving, Pulling to one side during braking, Reduced fuel economy, Burning smell from rear wheels
Fix: Rear caliper slide pins corrode in salt-belt states or if dealer skipped caliper service during brake jobs. One caliper recall (20V-134) covered left-rear piston seal on some VINs. Beyond recall, replace seized caliper, flush brake fluid, resurface or replace rotor. 1.5-2 hours per side. Preventive: clean and lube slide pins every brake pad change.
Estimated cost: $0 (recall) / $350-550 per caliper
Owner tips
Check oil level every 500 miles—if consuming more than 1 quart per 3,000 miles before 100k, document it and contact Acura dealer for potential goodwill coverage on piston rings.
Always use Honda DW-1 ATF for transmission—generic fluids cause premature 9-speed failure. Drain-and-fill every 30k miles, not 'lifetime fluid' marketing.
Inspect transmission cooler lines yearly after 60k miles, especially where they clip to frame rails—road salt eats the brackets.
Consider a VCM disable device (VCMuzzler or similar) if you plan long-term ownership past warranty—prevents the cylinder deactivation that kills rings.
Solid SUV if the engine hasn't grenaded yet—verify oil consumption history and recall completion before buying used, or budget $8k for worst-case engine replacement.
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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Honda (American Honda Motor Co.) is recalling certain 2014-2020 Acura MDX vehicles. Moisture may enter the tailgate lid light assembly and wiring harness, which can cause the interior and exterior lights to fail, including the lid lights, position lights, license plate lights and taillights.
Consequence: Vehicle lights that fail to illuminate can decrease visibility and increase the risk of a crash.
Remedy: Dealers will inspect the wiring and install a fuse harness, replace the lid light, and repair the body dust sealer, as necessary, free of charge. Owner notification letters were mailed May 30, 2025. Owners may contact Acura's customer service at 1-800-382-2238. Acura's number for this recall is FLI. Vehicles included in this recall that were previously repaired under NHTSA recall number 19V-256 will need to have the new remedy completed.
Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda Accord Hybrid, Pilot, Acura NSX vehicles. The fuel pump inside the fuel tank may fail.
Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are KGC and KGD. This recall is an expansion of NHTSA recall numbers 21V-215 and 20V-314.
ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL · 23V751000
2023-11-13
Honda (American Honda Motor Co.) is recalling certain 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2016 and 2018-2019 Pilot, 2017 and 2019 Ridgeline, and 2018-2019 Odyssey vehicles. Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine.
Consequence: A damaged engine may run improperly or stall while driving, increasing the risk of a fire, crash, or injury.
Remedy: Dealers will inspect and repair, or replace the engine as necessary, free of charge. Owner letters were mailed March 28, 2024. 2016-2017 Acura MDX owner letters were mailed November 1, 2024. 2016-2020 Acura MDX owner letters are expected to be mailed in mid-December 2024. Honda began mailing owner notification letters as of March 18, 2024. 2015-2016 Acura owner letters are expected to be mailed mid-December 2024, 2018 Acura TLX owner letters are expected to be mailed the end of March/early April 2024, 2019 Acura TLX owner letters are expected to be mailed mid-May 2024, 2020 Acura TLX owner letters are expected to be mailed mid-June 2024, and 2016-2020 Acura MDX owner letters are expected to be mailed January 27, 2025. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls are XG1 and GG0.
Honda (American Honda Motor Co.) is recalling certain 2019-2020 Acura MDX, MDX Sport Hybrid, RDX, TLX, Honda Accord, Civic Hatchback, Insight, 2019 Acura ILX, Honda Accord Hybrid, Civic Coupe, Civic Coupe Si, Civic Sedan, Civic Sedan Si, Civic Type R, Fit, HR-V, Odyssey, Passport, Pilot and Ridgeline, and 2018-2019 CR-V vehicles. The low-pressure fuel pump inside the fuel tank may fail.
Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
Remedy: Honda will notify owners, and dealers will replace the fuel pump assembly, free of charge. Owner letters were mailed May 18, 2021. Owners may contact Honda customer service at 1-888-234-2138. Note: This recall is an expansion of recall 20V-314.
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS · 19V298000
2019-04-12
Honda (American Honda Motor Co.) is recalling certain 2018-2019 Acura MDX and Honda Pilot vehicles and 2019 Acura RLX, RLX Sport Hybrid, TLX and Honda Odyssey and Ridgeline vehicles. The timing belt teeth may separate from the belt.
Consequence: Teeth separation from the timing belt may result in an engine stall, increasing the risk of crash.
Remedy: Honda will notify owners, and dealers will inspect the vehicle and replace any affected timing belt free of charge. Vehicles receiving a replacement timing belt will also have the engine inspected and any damaged components will be replaced for free. The recall began June 7, 2019. Honda owners may contact customer service at 1-888-234-2138. Honda's number for this recall is L4M. Acura owners may contact customer service at 1-888-234-2138. Acura's number for this recall is Z4L.
EXTERIOR LIGHTING:TAIL LIGHTS · 19V256000
2019-03-28
Honda (American Honda Motor Co.) is recalling certain 2014-2019 Acura MDX and 2017-2019 Acura MDX Sport Hybrid vehicles. Moisture may enter the tailgate lid lights, possibly causing a loss of the tailgate lid lights and the taillights.
Consequence: Loss of the taillights reduces the vehicle's visibility, increasing the risk of crash.
Remedy: Acura will notify owners, and dealers will modify the tailgate lid lights and install updated gaskets and a wiring sub-harness or will replace both tailgate lid lights. The repairs will be performed free of charge. The recall began May 7, 2019. Owners may contact Acura customer service at 1-888-234-2138. Acura's number for this recall is M49.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER · 18V777000
2018-11-01
Honda (American Honda Motor Co.) is recalling certain 2017-2019 Acura MDX, 2017-2018 Acura MDX Sport Hybrid, 2018-2019 Honda HR-V and Honda Odyssey, and 2016 Honda HR-V vehicles. The rear brake caliper pistons may have an insufficient coating, causing gas pockets to form, reducing brake performance. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 135, "Light Vehicle Brake Systems."
Consequence: A reduction of braking performance increases the risk of a crash.
Remedy: Owners will be notified, and Honda or Acura dealers will bleed the brakes, free of charge. The recall began December 11, 2018. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are C31 and L30.
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