LexusLS4302003Overview/lexus/ls430/2003/base/

2003 Lexus LS430

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 LS430.

Body PASSENGER CARTransmission Automatic 5-spd

The 2003 Lexus LS430 is a full-size passenger car powered by a 4.9-quart engine requiring 5W-30 oil, paired with a five-speed automatic transmission and achieving EPA ratings of 17 city, 23 highway, and 19 combined. Among the 20012006 model years, this year recorded 25 total owner complaints—far fewer than the 2001’s peak of 52 but slightly more than the 2006’s low of 17—and carried just one recall, placing it in the middle of the generation’s reliability history and suggesting a period of steady refinement before the model’s final year.

Model year200620052004200320022001

Quick specs

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

Engine oil capacity4.9 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque76 ft-lbsOEM · verified
EPA fuel economy17/23/19 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 24F · 585 CCA battery, OE oil filter 90915YZZD3. 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 24F · 585 CCAOEM · verified
Tail / brake / turnLIGHTSOEM · verified
Tire sizeP225-55WR17OEM · verified
Wheel / rim7.5-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter90915YZZD3
Engine air filter1780150030
Fuel filter233000A020 alt 2321746090
Spark plug9008091180
Front wiper blades8522212750 alt 8521213031
Serpentine belt9091602586
Thermostat9091603100 alt 1634650010
Cabin air filter8850830110 alt 8713950030

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 5-spd

Ratings & economy EPA / vPIC

EPA city / highway / combined17 / 23 / 19 mpg
DrivetrainRear-Wheel Drive
Passenger volume107 cu ft
Cargo volume16 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 4.9 qt of 5W-30 API engine oil, 80W-90 · 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 1-8-4-3-6-5-7-2.

Lubricants & capacities

Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity3 Pints
Engine Oil5W-30 · API
Engine Oil Capacity4.9 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts181 ft-lbs
Engine Oil Pan Drain Plug30.0 ft-lbs

Chassis torques

Lug Nuts76 ft-lbs
Rear Wheel Hub214 ft-lbs

Ignition

Cylinder Firing Order1-8-4-3-6-5-7-2
Curb Idle Speed (No Load)750 rpm
Curb Idle Speed Variance (No Load)50 rpm
Spark Plug Gap0.039-0.0.043 in
Spark Plug Torque13.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant CapacitySingle Unit, 1.32-1.54; dual unit, 1.87-2.09. lbs
Oil GroupPAG
Oil Type46
Oil Capacity4.90 oz
Standard BCI Group Number24F
Standard BCI Cranking Performance585 cca

Service checks

Residual Pressure21.0 psi
Injector Primary Resistance13.4-14.2 @ 68 degreesF ohms
Engine Compression142-178 PSI. 14 maximum variation PSI.
Engine Oil Pressure43 psi @ Idle, 43-85 psi @ 3000 rpm psi

Brakes

Torque Caliper to Bracket81 ft-lbs
Torque to Knuckle76 ft-lbs / 58 ft-lbs
Minimum Pad ThicknessFront: 0.039; Rear: 0.040 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.181 in / 0.63 in
Rotor Nominal Thickness To1.181 in / 0.63 in
Rotor Discard at or Under1.102 in / 0.571 in

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs at 120,000 mi; coolant every 30,000 mi. The big-interval services (every 30,000 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 7,500 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 15,000 miAccessory Drive Belt (inspect) · Axle Shaft Oil Seal (inspect) · Body Latches, Locks & Hinges (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace)
Every 30,000 miBrake Hydraulic System (drain, refill & bleed) · Drive Axle Assembly (drain & refill) · Engine Air Filter Element (replace) · Engine Coolant System (drain, flush & refill) · Fuel Line (inspect) · Fuel Tank (inspect)
At 60,000 miAccessory Drive Belt (inspect)
Every 60,000 miEngine Valves (inspect valve lash) · Fuel Evaporative Canister (inspect)
Every 90,000 miTiming Belt (replace)
At 120,000 miSpark Plugs (replace)

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 2003 model year sits at a distinct low point in the federal record, posting 25 complaints, 1 recall, and 78 TSBs—a sharp drop from 2002’s 42 complaints and 2 recalls, and a calm before 2004’s jump to 36 complaints and 4 recalls. Across the generation, the overall trajectory trends downward from 2001’s highs of 52 complaints and 104 TSBs, but that decline is interrupted by a mid-generation spike in 2004 that sees the highest recall count and a rebound in complaints and technical service bulletins. Within this arc, 2003 represents the pre-anomaly trough, carrying the fewest TSBs of the six-year span and the second-lowest complaint count after 2006, with zero investigations. For 2003 specifically, federal filings cluster in Structure (7), Air Bags (3), and Vehicle Speed Control (3), alongside 3 crash-related complaints and 0 fire-related complaints; the data does not specify root causes. Given its comparatively clean record and its position just before the 2004 spike, the 2003 LS430 stands out as one of the more stable years of this generation and is a favorable choice for a used-car buyer.

1
Open recalls
NHTSA campaigns
78
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
25
Owner complaints
3 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 25 complaints on record, top 8 components.

Structure7
Air Bags3
Vehicle Speed Control3
Tires2
Structure,Latches/Locks/Linkages1
Structure,Unknown Or Other1
Engine & Engine Cooling1
Service Brakes, Hydraulic1

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 78 bulletins on record with NHTSA.

BulletinDateComponentSummary
L-SB-0020-242024-04-19StructureVehicles may occasionally be subjected to contamination by airborne iron particles shed…
L-SB-0021-242024-04-19StructureLexus vehicles are currently protected with RapgardTM protective film designed to protect…
L-SB-0022-242024-04-19StructureAcid rain results from rainwater or other airborne moisture that become acidic due to…
L-SB-0024-242024-04-19StructureThe condition known as acid rain is caused by airborne chemicals or particles in the…
L-SB-0020-242024-04-19StructureVehicles may occasionally be subjected to contamination by airborne iron particles shed…

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 LS430. 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 2003 LS430 take?

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

Does the 2003 LS430 have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the LS430 get?

EPA figures are 17 city / 23 highway / 19 combined mpg.