The 2018 TLX is a solid mid-size sedan with a few notable weak points, especially the 2.4L I4 engine oil dilution issue and the ZF 9-speed transmission in V6 models. The platform itself is robust, but early J35Y6 V6 engines and specific transmission components require attention.
2.4L I4 Oil Dilution / Fuel in Crankcase
Common · high severity
Typical onset: 30,000-80,000 mi
Symptoms: rising oil level on dipstick, strong fuel smell in oil, check engine light with misfire codes, excessive engine noise or knock in cold weather
Fix: Short-trip driving in cold climates causes unburned fuel to dilute the oil. Honda/Acura extended warranty coverage to 6yr/125k mi for this issue. Severe cases require short block replacement (piston rings, bearings damaged by fuel wash). Labor: 18-24 hours for short block. TSB issued with software update and revised pistons/rings.
Estimated cost: $4,500-7,500
ZF 9-Speed Transmission Shudder and Harsh Shifts (V6 models)
Common · medium severity
Typical onset: 40,000-90,000 mi
Symptoms: shudder during light acceleration 20-40 mph, harsh 2-3 or 3-4 upshifts, hesitation from stop, clunking on downshifts
Fix: ZF 9HP transmissions suffer from torque converter shudder and valve body issues. Multiple TSBs for software updates and fluid changes (requires specific ZF fluid, NOT Honda DW-1). Severe cases need torque converter or valve body replacement. Labor: 8-12 hours for torque converter R&R.
Estimated cost: $2,800-4,200
Fuel Pump Failure (Recall 20V-486)
Occasional · high severity
Symptoms: no-start condition, engine dies while driving, sputtering under load, fuel pump whine from rear
Fix: Denso fuel pump impeller can crack and fail, causing stalling or no-start. Covered under NHTSA recall 20V-486. Dealer replacement takes 1.5-2 hours. If out-of-warranty and not recalled, aftermarket pump runs $300-500 plus 2 hours labor.
Estimated cost: $0 (recall) or $500-800
V6 (J35Y6) VCM Cylinder Deactivation Issues
Occasional · medium severity
Typical onset: 60,000-120,000 mi
Symptoms: vibration at idle or cruise, misfires on cylinders 1, 4, or 6, fouled spark plugs, carbon buildup on intake valves
Fix: Variable Cylinder Management (VCM) causes uneven wear and carbon buildup on affected cylinders. Some owners install VCM disablers. Proper fix involves walnut blasting intake valves (3 hours), new plugs, and possibly piston ring service if compression is lost. Direct injection exacerbates carbon issues.
Estimated cost: $800-2,500
Transmission Oil Cooler Line Leaks
Occasional · medium severity
Typical onset: 50,000-100,000 mi
Symptoms: transmission fluid puddle under vehicle, burnt smell, low fluid warning light, transmission slipping or overheating
Fix: Metal lines to external cooler corrode or rubber hoses crack at crimp points. Requires line replacement and possibly cooler if internal contamination occurred. Labor: 2-3 hours for lines, more if cooler replacement needed. Flush system after repair.
Estimated cost: $600-1,200
Engine Mount (Rear/Transmission Mount) Wear
Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: clunk on acceleration or deceleration, vibration at idle in Drive, excessive engine movement visible when revving
Fix: Rear/transmission mount hydraulic fluid leaks out, rubber tears. Common on all Honda/Acura platforms. Replacement takes 1.5-2 hours. OEM mounts preferred over aftermarket for longevity.
Estimated cost: $350-600
Owner tips
2.4L owners: avoid short trips in cold weather or idle to full operating temp before driving; change oil every 5k miles to flush fuel contamination
V6 9-speed: use only ZF-approved fluid (not Honda DW-1); service transmission every 30k miles to prevent shudder
All engines: use Top Tier fuel and occasional Italian tune-up to reduce carbon buildup on direct-injection valves
Check fuel pump recall status by VIN at NHTSA.gov before purchase
Solid daily driver if you avoid 2.4L oil dilution cars or get post-TSB fix; V6 is stronger engine but watch for transmission shudder—buy one with service records showing fluid changes.
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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AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER · 26V332000
2026-05-21
Honda (American Honda Motor Co.) is recalling certain 2018-2021, 2023 Acura TLX, 2019-2024 RDX, 2017-2020, 2022-2026 MDX, 2017-2021, 2023, 2025 Honda Ridgeline, 2017-2022 Pilot, 2019-2021 Passport, 2018-2026 Odyssey, 2019-2022 Insight, 2019-2021 HR-V, 2018-2020 Fit, 2020-2022 CR-V Hybrid, 2017-2022 CR-V, 2017-2018, 2021 Civic Type R, 2017-2021 Civic hatchback, 2016-2020 Civic coupe, 2016-2022 Civic, 2017-2022 Accord Hybrid, and 2016-2022 Accord vehicles. The front passenger seat weight sensor may crack and short circuit, which can cause the air bags to deploy unintentionally during a crash.
Consequence: Air bags that deploy unintentionally during a crash increase the risk of injury.
Remedy: Dealers will replace the seat weight sensors, free of charge. Owner notification letters are expected to be mailed July 6, 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's numbers for this recall are BOL, WO9, OOA, WOM, XOH, NOC, POD, BOE, UOF, POB, EOG, AOI, QO8, TOJ, DO7, and SOK. This recall expands previous NHTSA recall number 24V064. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning May 29, 2026.
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.
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.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.