LexusGS450H2008Overview/lexus/gs450h/2008/base/

2008 Lexus GS450H

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 GS450H.

Body PASSENGER CARTransmission Automatic (S6)

The 2008 Lexus GS450H is a passenger car equipped with an automatic S6 transmission, requiring 6.7 quarts of 5W-30 API oil and delivering EPA fuel economy ratings of 22 mpg city, 25 highway, and 23 combined. With 22 owner complaints and three recalls, this model year represents a clear improvement over the 48 complaints of the 2007 debut, yet it still predates the later years of the generation that saw as few as a single complaint.

Model year201820172016201520142013201120102008

Quick specs

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

Engine oil capacity6.7 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque76 ft-lbsOEM · verified
EPA fuel economy22/25/23 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 Hybrid · 360 CCA battery, OE oil filter 9672335028. 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 Hybrid · 360 CCAOEM · verified
Tail / brake / turnFUSEOEM · verified
Tire sizeP245-40R18OEM · verified
Wheel / rim8-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter9672335028 alt 9030179006
Engine air filter1780150060
Fuel filter2330031140
Spark plug9091901249
Battery2880031282 alt 2880031341
Front wiper blades8522233241 alt 8521233231
Serpentine belt99367K0810
Thermostat1632631050 alt 1603131020
Cabin air filter8713907010

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S6)

Ratings & economy EPA / vPIC

EPA city / highway / combined22 / 25 / 23 mpg
DrivetrainRear-Wheel Drive
Passenger volume98 cu ft
Cargo volume8 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 5W-30 API engine oil, 75W-85 · GL-5 in the differential. Torque lug nuts to 76 ft-lbs, the oil drain plug to 30.0 ft-lbs. The firing order is 1-2-3-4-5-6.

Lubricants & capacities

Differential Gear Oil75W-85 · GL-5
Differential Gear Oil Capacity3 Pints
Engine Oil5W-30 · API
Engine Oil Capacity6.7 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts184 ft-lbs
Engine Flywheel Bolts61 ft-lbs
Main Bearings16
Engine Oil Pan Drain Plug30.0 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
Ignition Timing8-12, Not adjustable degrees
Ignition Timing Reference RPMIdle rpm

Battery & A/C

RefrigerantR134a
Refrigerant Capacity0.88-1.10 lbs
Oil GroupPAG
Oil TypeND 11 Oil
Oil Capacity4.61 oz
Standard BCI Group NumberS65D26L Hybrid
Standard BCI Cranking Performance360 cca

Service checks

Pressure Test17 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature176-183 °F
Residual Pressure21.0 psi
Injector Primary Resistance3-100 Motor ohms
Engine Compression101-143 PSI. 15 maximum variation PSI.

Brakes

Torque to Knuckle57 ft-lbs / 40 ft-lbs
Torque Caliper to Bracket18 ft-lbs
Minimum Pad ThicknessFront: 0.039; Rear: 0.040 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.181 in / 0.709 in
Rotor Nominal Thickness To1.181 in / 0.709 in
Rotor Discard at or Under1.063 in / 0.65 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
130 ft. lbs., Step 2: 9030 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 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.

Every 5,000 miBrake Linings (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 10,000 miBrake Rotor (inspect)
At 15,000 miCabin Air Filter (inspect)
Every 15,000 miBrake Line (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Driveshaft (inspect) · Engine Coolant System (inspect fluid level) · Exhaust System (Complete) (inspect)
Every 30,000 miAccessory Drive Belt (inspect) · Brake Hydraulic System (drain, refill & bleed) · Cabin Air Filter (replace) · Cabin Air Filter (inspect) · Engine Air Filter Element (replace) · Fuel Line (inspect)
Every 50,000 miEngine Coolant System (drain, flush & refill)
Every 60,000 miSpark Plugs (replace)
At 100,000 miEngine Coolant System (drain, flush & refill)
Every 100,000 miTransmission Assembly (inspect fluid level)

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 2008 Lexus GS450H sits at a transitional point in its generation's reliability arc. Compared to the preceding year, 2007, the 2008 model shows a marked improvement with complaints dropping from 48 to 22 and recalls falling from 5 to 3, suggesting the manufacturer addressed some early-generation issues. However, the 2008 model still recorded the second-highest complaint count in the dataset and maintained a substantial TSB volume of 135 entries, indicating ongoing service bulletins were necessary. The trend across subsequent years shows a steady decline in complaints—falling to just 5 by 2011 and reaching single digits thereafter—while recalls dropped to zero by 2012, suggesting the platform matured considerably after 2008. The top complaint areas for 2008 (unknown/other, engine, and fuel/propulsion system) lack a clear singular root cause in the data, and the three crash complaints and one fire complaint are noted but without specification of causal relationship. The 2008 model represents a better prospect than the 2007 generation but remains more issue-prone than the post-2011 years, making it a reasonable purchase if priced accordingly below later-model GS450H units.

3
Open recalls
NHTSA campaigns
135
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
22
Owner complaints
3 involved a crash · 1 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 22 complaints on record, top 8 components.

Unknown Or Other5
Engine4
Fuel/Propulsion System3
Service Brakes2
Exterior Lighting2
Visibility1
Power Train,Hybrid Propulsion System1
Power Train,Service Brakes1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

10V309000Engine And Engine Cooling:EngineReported 06/07/2010

TOYOTA IS RECALLING CERTAIN MODEL YEAR 2006 THROUGH 2008 LEXUS PASSENGER CARS MANUFACTURED FROM AUGUST 26, 2005 THROUGH AUGUST 4, 2008. MICRO-FOREIGN OBJECTS IN THE MATERIAL OF THE VALVE SPRING MAY DEGRADE THE STRENGTH… Remedy: TOYOTA WILL NOTIFY OWNERS AND DEALERS WILL REPAIR THE VEHICLES FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 2, 2010. OWNERS MAY CONTACT LEXUS AT 1-800-255-3987.

Technical service bulletins NHTSA · verified

Showing 5 of 135 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-0030-24 Rev12024-07-29StructureSome 2005 – 2024 Lexus vehicles that have undergone water intrusion may exhibit a…
L-SB-0030-24 Rev12024-07-29StructureSome 2005 – 2024 Lexus vehicles that have undergone water intrusion may exhibit a…
L-SB-0030-242024-06-21StructureSome 2005 – 2024 Lexus vehicles that have undergone water intrusion may exhibit a…
L-SB-0030-242024-06-21StructureSome 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 2008 GS450H take?

6.7 qt of 5W-30 API, per the factory manual.

Does the 2008 GS450H have open recalls?

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

What gas mileage does the GS450H get?

EPA figures are 22 city / 25 highway / 23 combined mpg.