The 2016 MDX with the 3.5L V6 is generally reliable, but faces a catastrophic engine failure issue tied to defective pistons and rings that can grenade engines prematurely. Transmission cooler leaks and minor fuel system hiccups round out the problem areas.
Symptoms: Excessive oil consumption (1+ quart per 1,000 miles), White or blue smoke from exhaust on cold starts, Metallic knocking from lower end, especially under load, Check engine light with misfire codes, Sudden loss of compression leading to complete failure
Fix: Honda's Variable Cylinder Management (VCM) system causes accelerated wear on rings and pistons in cylinders 1, 4, and 6. Requires complete engine rebuild or short-block replacement. Labor runs 20-30 hours depending on teardown extent. Some owners have had partial success with ECU VCM disable modules as preventive measure before failure.
Estimated cost: $6,000-12,000
Transmission Oil Cooler Line Leaks
Common · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Transmission fluid spots under vehicle near radiator area, Low transmission fluid warning or limp mode, Pink/red fluid mixing with coolant in overflow tank, Rough shifting or delayed engagement when low on fluid
Fix: Factory cooler lines and connections at radiator develop leaks due to corrosion and vibration fatigue. Replace both cooler lines, fittings, and inspect radiator-side connections. Some techs also replace transmission mount at same time since access is easier. 3-5 hours labor.
Estimated cost: $800-1,400
Transmission Mount Failure
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunking on acceleration or deceleration, especially reverse-to-drive, Vibration at idle with transmission in gear, Visible sagging or torn rubber on mount inspection, Excessive driveline movement when rocking vehicle
Fix: Upper transmission mount deteriorates from heat and engine torque. Honda revised the part design around 2017. Replacement is straightforward but requires supporting transmission. 2-3 hours labor.
Estimated cost: $400-700
Fuel Pump Module Failure
Occasional · high severity
Symptoms: Intermittent no-start or extended cranking before start, Stalling at operating temperature or after fuel fill-up, Fuel gauge erratic or stuck at full/empty, Check engine light with fuel system pressure codes
Fix: In-tank fuel pump and sender assembly fails, typically the pump motor itself or internal wiring harness. Honda issued recalls for some build dates (check VIN). Requires fuel tank drop and module replacement. 3-4 hours labor.
Estimated cost: $800-1,300
Taillight LED Circuit Board Corrosion
Occasional · low severity
Symptoms: One or more taillight functions not working (brake, turn, reverse), Intermittent function, works after tapping housing, Moisture visible inside taillight assembly, Bulb-out warning on dash but bulbs test fine
Fix: Water intrusion corrodes LED circuit boards inside taillight assemblies. Honda had a recall on some units. Requires complete taillight housing replacement—boards aren't sold separately. 1 hour per side.
Estimated cost: $400-800
Owner tips
Monitor oil consumption religiously—check every fuel fill. If burning more than 1 quart per 3,000 miles, consider preemptive VCM disable or budget for engine work.
Change transmission fluid every 30,000 miles with genuine Honda ATF DW-1. Inspect cooler lines annually for seepage.
Use Top Tier fuel and replace fuel filter every 60,000 miles to reduce pump stress.
Park in garage or use car cover if possible—taillight corrosion accelerates in humid climates.
Buy only if you can verify oil consumption is normal and budget $2-3k reserve for potential engine or transmission repairs; the VCM engine issue is a ticking time bomb on higher-mileage units.
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.
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.
FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP · 19V060000
2019-01-29
Honda (American Honda Motor Co.) is recalling certain 2016-2018 Acura MDX, 2015-2019 Acura TLX and 2015-2017 Honda Accord vehicles, equipped with a 3.5L V6 engine. Particulates in fuel may adhere to the internal components of the fuel pump, reducing its performance.
Consequence: Reduced fuel pump performance can result in an engine stall, increasing the risk of crash.
Remedy: Honda will notify owners, and dealers will update the fuel injection engine control unit (FI-ECU) software and, if necessary, replace the fuel pump, free of charge. The recall began March 25, 2019. Owners may contact customer service at 1-888-234-2138. Acura's recall number for this recall is P3W. Honda's recall number for this recall is N3X.
Honda (American Honda Motor Co.) is recalling certain model year 2015 Acura MDX 2WD and MDX 4WD vehicles, 2016 Acura MDX 4WD vehicles, 2015-2016 Honda Odyssey vehicles, and 2016 Honda Pilot 2WD and 4WD vehicles. The affected vehicles have fuel tanks that were manufactured with insufficient welds which may separate and allow fuel to leak out.
Consequence: A fuel leak in the presence of an ignition source may result in a fire.
Remedy: Honda will notify owners, and dealers will replace the fuel tanks, free of charge. Owners may contact Honda/Acura customer service at 1-888-234-2138. The recall began on July 29, 2016. Honda's numbers for this recall are KA9 (Honda vehicles) and KB0 (Acura vehicles).
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