LexusGS450H2018Overview/lexus/gs450h/2018/base/

2018 Lexus GS450H

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 GS450H.

Body SUVTransmission Automatic (AV-S8)

The 2018 Lexus GS450H is an SUV requiring 6.7 quarts of 0W-20 engine oil and equipped with an Automatic (AV-S8) transmission, carrying EPA fuel-economy ratings of 29/34/31 mpg. Those maintenance and efficiency metrics coexist with 27 total owner complaints—where service brakes represent the top concern—and a clean recall record of zero. Viewed against the 2007–2017 model-span complaint history that ranged from a peak of 48 in 2007 to a single complaint in 2012, the 2018 model year sits in the middle of that reliability spectrum, pointing to a measured, moderate ownership experience.

Model year201820172016201520142013201120102009

Quick specs

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

Engine oil capacity6.7 qtOEM · verified
Engine oil type0W-20OEM · verified
Lug nut torque76 ft-lbsOEM · verified
EPA fuel economy29/34/31 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI S65D26L · 360 CCA battery, OE oil filter 9030179006. 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.

Battery groupBCI S65D26L · 360 CCAOEM · verified
Tail / brake / turnBECUOEM · verified
Tire sizeP225/50R17, P235/45R18, P235/40R19, P265/35R19OEM · verified
Wheel / rim7.5, 8, 8, 9 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter9030179006 alt 04152YZZA3
Engine air filter1780131170
Spark plug9091901263
Battery2880031411
Front wiper blades8521230480 alt 8522230650
Serpentine belt9091602703
Thermostat1632631050 alt 1603131020
Cabin air filter8713930100

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (AV-S8)

Ratings & economy EPA / vPIC

EPA city / highway / combined29 / 34 / 31 mpg
DrivetrainRear-Wheel Drive
Passenger volume99 cu ft
Cargo volume13 cu ft
Recommended fuelPremium Gasoline

Service quick specs OEM factory data

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

This engine holds 6.7 qt of 0W-20 engine oil, 75W-85 · GL-5 in the differential. Torque lug nuts to 76 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity6.0
Differential Gear Oil75W-85 · GL-5
Engine CoolantHOAT
Engine Oil0W-20
Engine Oil Capacity6.7 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts192.0 ft-lbs
Engine Flywheel Bolts61.0 ft-lbs
Engine Flywheel Bolts61.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs81.0 inch lbs. ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs81.0 inch lbs. ft-lbs

Chassis torques

Lug Nuts76 ft-lbs
Rear Wheel Hub214 ft-lbs

Ignition

Cylinder Firing Order1-2-3-4-5-6
Curb Idle Speed (No Load)1000 rpm
Curb Idle Speed Variance (No Load)50 rpm
Curb Idle Speed (Secondary Under Load)Controlled by ECU rpm
Spark Plug ManufacturerLexus
Spark Plug Gap.028
Spark Plug Torque13 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity0.99-1.25 lbs
Oil TypeND 11 Oil
Oil Capacity4.00-4.60 oz
Standard BCI Group NumberS65D26L
Standard BCI Cranking Performance360 cca

Service checks

RPM28.0-121.0 @ Idle rpm
Residual Pressure21.0.
Engine Compression102

Brakes

Brake Caliper Bolt to Carrier TorqueRear: 20
Brake Caliper Carrier to Hub Bolt TorqueFront: 100; Rear: 92
Vented Rotor Minimum Thickness for ReplacementFront: 1.062; Rear: .650
Maximum Rotor Runout.002
Maximum Drum DiameterParking Brake: 7.520

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 2 stages
118.0 ft. lbs.18 ft. lbs
290.0
Connecting Rod (Large End) Bearings — tightening sequence 2 stages
130.0 ft. lbs.30 ft. lbs
290.0
Main Bearings — tightening sequence 3 stages
1Cap bolts45 ft. lbs
2Cap bolts90 degrees
338.0
Main Bearings — tightening sequence 3 stages
1Cap bolts45 ft. lbs
2Cap bolts90 degrees
319.0
Main Bearings — tightening sequence 3 stages
1Cap bolts45 ft. lbs
2Cap bolts90 degrees
319.0

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 10,000 mi; spark plugs every 60,000 mi; coolant every 50,000 mi. The big-interval services (every 50,000 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.

At 5,000 miFloor Mat (inspect)
Every 5,000 miBrake System (inspect) · Floor Mat (inspect) · Fuel Tank (add fluid conditioner) · Tire & Wheel Assembly (rotate) · Universal Vehicle Operation (inspect all fluid levels) · Windshield Wiper Blade (inspect)
Every 10,000 miCabin Air Filter (replace) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 15,000 miAccessory Drive Belt (inspect) · Brake Line (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Engine Coolant System (inspect fluid level) · Exhaust System (Complete) (inspect)
Every 30,000 miBrake Hydraulic System (drain, refill & bleed) · Brake Rotor (inspect) · Engine Air Filter Element (replace) · Fuel Evaporative Emission Control System Lines (inspect) · Fuel Line (inspect) · Fuel Tank Filler Cap O-Ring (inspect)
Every 50,000 miEngine Coolant System (drain, flush & refill)
At 60,000 miAccessory Drive Belt (inspect)
Every 60,000 miSpark Plugs (replace)
At 100,000 miEngine Coolant System (drain, flush & refill)

Reliability & federal safety record

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

The 2018 Lexus GS450H occupies a notably stable point in its generation’s federal record, particularly when compared to earlier model years. Complaints dropped sharply after 2013, with 2015, 2017, and 2018 each recording just one or two formal grievances—far below the 48 seen in 2007 or the 22 in 2008. Recalls followed a similar downward arc, with zero recalls from 2012 onward, including 2018, while Technical Service Bulletins (TSBs) remained elevated but consistent with the post-2013 norm. The 2018 model’s top complaint areas—service brakes (5), engine (2), and structure (2)—reflect isolated concerns rather than systemic issues, and the absence of fire-related complaints or investigations further underscores its reliability. This year falls squarely within the generation’s most dependable phase, where quality control appears to have stabilized. **For a used GS450H, 2018 is a strong choice, offering minimal risk of unresolved defects or recall exposure.**

0
Open recalls
NHTSA campaigns
132
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
27
Owner complaints
2 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★
Side★★★★★
Rollover★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 27 complaints on record, top 8 components.

Service Brakes5
Unknown Or Other4
Engine2
Structure2
Fuel/Propulsion System2
Steering,Suspension1
Engine,Back Over Prevention,Forward Collision Avoidance1
Visibility/Wiper1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 132 bulletins on record with NHTSA.

BulletinDateComponentSummary
L-SB-0030-24 Rev22025-12-15StructureSome 2005 – 2026 Lexus vehicles that have undergone water intrusion may exhibit a…
L-SB-0043-23 Rev12025-06-13Electrical SystemThe air conditioning dye injection tool kit has been developed to aid in identifying the…
L-SB-0017-19 Rev12025-02-07StructureSome 2010 – 2026 model year Lexus vehicles may exhibit paint stains after the removal of…
L-SB-0017-19 Rev12025-02-07StructureSome 2010 – 2026 model year Lexus vehicles may exhibit paint stains after the removal of…
L-SB-0030-24 Rev12024-07-29StructureSome 2005 – 2024 Lexus vehicles that have undergone water intrusion may exhibit a…

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 GS450H. 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 GS450H take?

6.7 qt of 0W-20 STARBURST, per the factory manual.

Does the 2018 GS450H have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the GS450H get?

EPA figures are 29 city / 34 highway / 31 combined mpg.