The 2018 Sentra with the CVT (both 1.8L and 1.6T) is known for premature transmission failures and catastrophic engine issues, particularly in the 1.8L MR18DE. The frequency of internal engine damage—pistons, rings, bearings—at relatively low mileage is unusually high for this platform.
Symptoms: Shuddering or jerking during acceleration, especially 15-40 mph, Delayed engagement when shifting to Drive or Reverse, Whining or grinding noise from transmission, Transmission overheating warning, Complete loss of forward motion
Fix: CVT replacement or rebuild required in most cases. Fluid changes every 30k miles help but don't prevent failure. Nissan extended warranty to 84 months/84k miles on some units, but many fail outside that window. 8-12 labor hours for R&R.
Symptoms: Excessive oil consumption—quart every 500-1000 miles, Blue smoke from exhaust on cold start or acceleration, Knocking or ticking noise from lower engine block, Metal shavings in oil, Loss of compression, misfires
Fix: Piston ring wear leads to oil burning; bearing failures result from debris or oil starvation. Requires engine rebuild (20-25 hours) or short block replacement (18-22 hours). Used engines are common fix due to cost. This is most common on the 1.8L MR18DE.
Estimated cost: $4,000-7,000
Transmission Oil Cooler Line Leaks
Common · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Red transmission fluid puddles under car, Low CVT fluid warning or overheating, Fluid dripping from front of engine bay, Burning smell after driving
Fix: Cooler lines rust through or crack at crimp points where they connect to radiator. Replace both lines and top off CVT fluid. If driven low on fluid, CVT damage follows. 2-3 labor hours.
Estimated cost: $300-600
Brake Light Switch Failure (Recall 18V-355)
Occasional · medium severity
Symptoms: Brake lights stay on constantly, draining battery, Brake lights don't illuminate when pedal pressed, Push-button start won't engage, Cruise control won't activate
Fix: Faulty brake light switch—NHTSA recall covers replacement at no cost. Even post-recall, switches can fail again. Simple replacement, 0.5 labor hours if paying out-of-pocket.
Estimated cost: $80-150
Engine/Transmission Mount Failure
Common · low severity
Typical onset: 70,000-110,000 mi
Symptoms: Excessive engine movement visible when shifting to Drive/Reverse, Clunking from engine bay during acceleration or braking, Vibration at idle, especially with AC on, Transmission feels 'loose' when engaging gears
Fix: Rubber mounts deteriorate, especially the front/rear engine mounts and transmission mount. Replace all three while you're in there to avoid repeat labor. 2-3 hours total.
Estimated cost: $400-700
Backup Camera Malfunction (Recall 20V-074)
Occasional · low severity
Symptoms: Backup camera display goes blank or shows 'no signal', Intermittent camera operation—works only sometimes, Camera image freezes or distorts
Fix: Software glitch in rearview display. Recall requires dealer software update. If hardware failure (camera itself), replacement camera and reprogramming needed. 1 hour labor if not recall-covered.
Estimated cost: $200-400
Owner tips
Change CVT fluid every 30,000 miles with Nissan NS-3 fluid—not lifetime as claimed. Monitor transmission cooler lines for seepage starting at 50k.
Check oil level every 500 miles on the 1.8L engine. Consumption above 1 quart per 1,000 miles indicates ring wear—address before bearing damage occurs.
Inspect engine mounts annually after 60k miles. Replacing them before they tear completely prevents transmission damage from excessive movement.
Verify recall work (brake switch, camera) was completed—check Nissan's VIN lookup even if buying used.
Avoid unless you're getting it cheap and can budget for a CVT replacement—the 1.8L engine and transmission reliability issues make this a risky used buy above 70k miles.
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.
Fitment notes: Standard engine compartment location
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Every control module on the 2018-2019 Nissan Sentra — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Odometer programming required to transfer mileage; VIN must match vehicle
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Nissan North America, Inc. (Nissan) is recalling certain 2016-2019 Nissan Sentra vehicles. The brake light switch may become contaminated, preventing the circuit from closing and the brake lights from illuminating.
Consequence: The brake lights may not illuminate, increasing the risk of a crash.
Remedy: Dealers will replace the brake light switch and install a protective grommet, free of charge. Owner notification letters were mailed July 1, 2022. Owners may contact Nissan customer service at 1-800867-7769. Nissan's number for this recall is PM971.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA · 19V654000
2019-09-12
Nissan North America, Inc. (Nissan) is recalling certain 2018-2019 Nissan Altima, Armada, Frontier, Kicks, Leaf, Maxima, Murano, NV, NV200, Pathfinder, Rogue, Rogue Sport, Sentra, Titan, Titan Diesel, Versa Note and Versa Sedan vehicles, as well as Infiniti Q50, Q60, QX30 and QX80 vehicles. Additionally included are 2019 Nissan GT-R and Taxi and Infiniti QX50, QX60, Q70, Q70L vehicles. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
Consequence: The lack of an image in the back-up camera display increases the risk of a crash.
Remedy: Nissan will notify owners in phases, having dealers update the back-up camera settings software, free of charge. The recall began November 11, 2019 and all affected VINs should be activated. Owners may contact Nissan customer service at 1-800-867-7669 or INFINITI customer service at 1-800-662-6200.
Fuel economy (EPA)
City
29mpg
Highway
37mpg
Combined
32mpg
Fuel
Regular Gasoline
Capability & size
EPA class
Midsize Cars
Wiper blades
B17 generation (2013-2019). Sedan body style has no rear wiper.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2018 Nissan Sentra 1.8L I4 MR18DE and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.