InfinitiQ50 HEV2018Overview/infiniti/q50-hev/2018/base/

2018 Infiniti Q50 HEV

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 Q50 HEV.

Body PASSENGER CAR

Classified as a passenger car, the 2018 Infiniti Q50 HEV utilizes a 2WD configuration and requires 0W-30 / 0W-40 oil viscosity for operation. Ownership records for this model year indicate 3 recalls and 42 total owner complaints, with the engine cited as the top complaint area. These figures contextualize where this model year sits within the broader reliability history, signaling specific areas of concern for researchers evaluating the vehicle.

Model year2020201920182017201620152014

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity2WDOEM · verified
Engine oil type0W-30 / 0W-40OEM · verified
Lug nut torque80 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses OE oil filter 1520865F1E. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Tail / brake / turnSIGNALOEM · verified
Tire sizeP225/55RF17OEM · verified
Wheel / rim7.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter1520865F1E alt 21334HG01B
Engine air filter16546ED000 alt 16546HG00B
Spark plug22401EW61C alt 224015CA1D
Front wiper blades288904GF0B alt 288904GF1A
Serpentine belt117204GD0B alt 117205CA0B
Thermostat1305031U00 alt 110625CA1A
Cabin air filterB72774HH0A alt B72771CA1B

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length189 in
Overall width71.7 in
Overall height57.5 in
Wheelbase112.2 in
Curb weight3845 lb
Track (front / rear)60.6 / 62.6 in
Weight distribution (front / rear)55/45

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 2WD of 0W-30 / 0W-40 engine oil, Front: 80W- in the differential, DOT 3 brake fluid. Torque lug nuts to 80 ft-lbs. The firing order is 1-2-3-4-5-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity10.6-10.7
Brake FluidDOT 3
Differential Gear OilFront: 80W-
Engine CoolantUse BASF G48
Engine Coolant Capacity9.5
Engine CoolantUse Nissan long life coolant
Engine Coolant Capacity9.0-11.0

Engine torques

Crankshaft Position (CKP) Sensor Bolt(s)5.1 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)5.1 ft-lbs
Crankshaft Position (CKP) Sensor Bolt(s)7.4 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)7.4 ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs21.0 ft-lbs
Camshaft Sprocket and/or Gear Bolt(s)76.0 ft-lbs
Camshaft Sprocket and/or Gear Bolt(s)76.0 ft-lbs
Engine Coolant Temperature (ECT) Sensor Bolt(s)18.0 ft-lbs

Chassis torques

Lug Nuts80 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-2-3-4-5-6
Curb Idle Speed (No Load)750 rpm
Curb Idle Speed (No Load)750 rpm
Curb Idle Speed (No Load)650 rpm
Curb Idle Speed Variance (No Load)50 rpm
Spark Plug ManufacturerInfiniti
Spark Plug Gap.043 in

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.10 lbs
RefrigerantR134a
Refrigerant Capacity1.10 lbs
Oil GroupPAG
Oil Type46
Oil Capacity3.04 oz

Service checks

Fuel Pump Pressure Minimum58.0 psi
Fuel Pump Pressure Maximum97.0 psi
Regulated Fuel System Pressure (Without Vacuum)58.0-97.0 psi
RPM58.0-97.0 @ Idle rpm
Fuel Pump Pressure Minimum65.0 psi
Regulated Fuel System Pressure (Without Vacuum)65.0 psi
RPM65.0 @ Idle rpm
Engine Compression167

Brakes

Brake Caliper Bolt to Carrier TorqueFront: 25; Front: 25; Rear: 32
Brake Caliper Carrier to Hub Bolt TorqueFront: 91; Rear: 62; Front: 91; Rear: 62
Variation from Parallelism Thickness Variation.0006
Maximum Rotor RunoutFront: .0014; Rear: .0022

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 3 stages
112.0 inch lbs.12 in
248.0 inch lbs.48 in
396.0 inch lbs.96 in
Connecting Rod (Large End) Bearings — tightening sequence 4 stages
121.0 ft. lbs.21 ft. lbs
2Back off 360.0 degrees360 degrees
318.0 ft. lbs.18 ft. lbs
490.0
Connecting Rod (Large End) Bearings — tightening sequence 4 stages
121.0 ft. lbs.21 ft. lbs
2Back off 360.0 degrees360 degrees
318.0 ft. lbs.18 ft. lbs
490.0
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
1148.0 ft. lbs., Step 2: 90148 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
133.0 ft. lbs., Step 2: 9033 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
133.0 ft. lbs., Step 2: 9033 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Measure the diameter of each cylinder head bolt at point A and point B. Point A = 11.00 mm from thread end and point B = 50.50 mm from thread end. If either diameter is less than 0.16 mm use new bolts coated with clean engine oil. Tighten all bolts to finger tight then continue on with the following procedure. Step 1: Bolts 1-8: 30.0 ft. lbs.

2Bolts 1-8115 degrees
3Bolts 1-8115 degrees
4Bolts 9-1021 ft. lbs
Engine Flywheel Bolts — tightening sequence 2 stages
133.0 ft. lbs.33 ft. lbs
290.0
Intake Manifold to Engine Bolts — tightening sequence 3 stages
15 ft. lbs.5 ft. lbs
221 ft. lbs.21 ft. lbs
38
Main Bearings — tightening sequence 3 stages
1Bolts 17-2618 ft. lbs
2Bolts 1-1626 ft. lbs
390.0
Main Bearings — tightening sequence 3 stages
1Bolts 17-2618 ft. lbs
2Bolts 1-1626 ft. lbs
390.0
Engine Valve Cover Bolts — tightening sequence 1 stages
11.5 ft. lbs., Step 2: 6.01.5 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 5,000 mi; spark plugs at 105,000 mi; coolant at 105,000 mi. The big-interval services (at 105,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 5,000 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 10,000 miAccessory Drive Belt (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Brake Pedal Assembly (inspect) · Brake Rotor (inspect) · CV Joint Boot (inspect)
Every 15,000 miCabin Air Filter (replace) · Keyless Entry Remote Battery (replace)
Every 20,000 miAccessory Drive Belt (inspect) · Brake Hydraulic System (drain, refill & bleed) · Drive Axle Assembly (inspect) · Engine Assembly (leak inspection) · Exhaust System (Complete) (inspect) · Fuel Evaporative Emission Control System Lines (inspect)
Every 30,000 miEngine Air Filter Element (replace)
At 40,000 miAccessory Drive Belt (inspect)
At 105,000 miEngine Coolant System (drain, flush & refill) · Spark Plugs (replace)
At 120,000 miEngine Coolant System (drain, flush & refill)
At 125,000 miHybrid Inverter (drain, flush & refill coolant)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2018 Infiniti Q50 HEV lead in one area — the engine, 10 of 42 reports (24%), well ahead of the next concern. None of this vehicle's 3 recall campaigns target the engine, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 1 of the reports describe a crash and 1 a fire — a small share of the total, but worth weighing against the engine pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

3
Open recalls
NHTSA campaigns
158
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
42
Owner complaints
1 involved a crash · 1 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 42 complaints on record, top 8 components.

Engine10
Air Bags4
Unknown Or Other4
Electrical System,Back Over Prevention2
Fuel/Propulsion System2
Wheels2
Air Bags,Seat Belts1
Electrical System1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

19V654000Back Over Prevention: Sensing System: CameraReported 12/09/2019

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… 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…

17V476000Fuel System, Gasoline:Delivery:Fuel PumpReported 27/07/2017

Nissan North America, Inc. (Nissan) is recalling certain 2016-2018 Infiniti Q50 and 2017 Infiniti Q60 vehicles equipped with a 2.0L engine. Incorrect Fuel Pump Control Module (FPCM) software may allow the fuel level in… Remedy: Nissan will notify owners, and Infiniti dealers will reprogram the Fuel Pump Control Module (FPCM) with corrected software, free of charge. The recall began August 29, 2017…

Technical service bulletins NHTSA · verified

Showing 5 of 158 bulletins on record with NHTSA.

BulletinDateComponentSummary
ITB09-063C2026-04-13StructureCERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision…
ITB12-011R2026-03-30Electrical SystemTELEMATICS SERVICE INFORMATION See ITB19-029 for models built after those listed above…
ITB23-023A2025-02-20Electrical SystemAEB WARNING LIGHT IS ON WITH WARNING MESSAGES DISPLAYED ON COMBINATION METER APPLIED…
P4A05, P4A062025-02-04Engine***** Retailer Announcement ***** INFINITI is committed to providing the highest levels…
ITB17-050C2025-02-04EngineMIL ON WITH DTC(S) STORED IN THE ECM This bulletin is no longer active. Please discard…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Q50 HEV. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2018 Q50 HEV take?

2WD of 0W-30 Preferred, 0W-40, per the factory manual.

Does the 2018 Q50 HEV have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.