LexusSC4001998Overview/lexus/sc400/1998/base/

1998 Lexus SC400

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 SC400.

Defined by its requirement for 5 qt of 5W-30 API engine oil, the 1998 Lexus SC400 sits within the 1990-2001 years covered by the model complaint history. With zero recalls and only two total owner complaints centered on Vehicle Speed Control, this model year presents a stark contrast to the history's highest complaint count of 30 in 1992. While the 1990 model year recorded the lowest single complaint count of one, the 1998 iteration remains a statistically stable point in the vehicle's history for researchers evaluating long-term reliability.

Model year200019991998199719961995199419931992

Quick specs

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

Engine oil capacity5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque76 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 27F · 625 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 27F · 625 CCAOEM · verified
Tail / brake / turnHEADOEM · verified
Tire size225-55VR16OEM · verified
Wheel / rim6-, 6.5-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter90915YZZD3
Engine air filter1780107020
Fuel filter2330020050
Spark plug9008091180
Front wiper blades8522220340 alt 8521224071
Serpentine belt9091602586 alt 9091602361
Thermostat9091603100 alt 1634650010
Cabin air filter8888030040

Service quick specs OEM factory data

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

This engine holds 5 qt of 5W-30 API engine oil, 80W-90 · GL-5 in the differential. Torque lug nuts to 76 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 Capacity5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts181 ft-lbs
Engine Flywheel Bolts72 ft-lbs

Chassis torques

Lug Nuts76 ft-lbs
Front Wheel Hub147 ft-lbs
Rear Wheel Hub213 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 Capacity2.05-2.10 lbs
Oil GroupPAG
Oil Capacity4.00-4.10 oz
Standard BCI Group Number27F
Standard BCI Cranking Performance625 cca

Service checks

Pressure Test17 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature176-183 °F
Residual Pressure21.0 psi
Injector Primary Resistance13.4-14.2 @ 68 degreesF ohms
Engine Compression142-178 PSI. 14 maximum variation PSI.
Engine Oil Pressure4.3 psi @ Idle, 43-85 psi @ 3000 rpm psi
Intake Valve Lash0.006-0.010 in

Brakes

Torque Caliper to Bracket25 ft-lbs / 79 ft-lbs
Torque to Knuckle77 ft-lbs / 76 ft-lbs
Minimum Pad ThicknessFront: 0.039; Rear: 0.040 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.26 in / 0.63 in
Rotor Nominal Thickness To1.26 in / 0.63 in
Rotor Discard at or Under1.181 in / 0.591 in

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
13 ft. lbs., Step 2: 9 ft. lbs., Step 3: 12 ft. lbs.3 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118 ft. lbs., Step 2: 9018 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 7,500 mi; spark plugs every 60,000 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) · Differential (inspect fluid level)
Every 30,000 miBrake Hydraulic System (drain, refill & bleed) · 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 Filter (inspect) · Spark Plugs (replace)
Every 90,000 miTiming Belt (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 1998 Lexus SC400 occupies a notably stable point in its generation’s federal record, with just two complaints—far below the 1992 peak of 30 and on par with the near-zero levels seen in 1997 and 1999–2001. Unlike 1992 and 1996, which each saw a recall, the 1998 model year had none, continuing a trend of minimal safety-related interventions that began in 1997. Technical Service Bulletins (TSBs) rose sharply to 42 in 1998, matching 1999 and 2000, suggesting Lexus was addressing refinement issues rather than safety defects. The single crash-related complaint and absence of fire reports further indicate the 1998 model avoided the more severe problems noted in earlier years. With no investigations or recalls and only minor speed-control and engine-cooling complaints, the data implies 1998 is among the most trouble-free years of the generation. This makes it a strong candidate for purchase, assuming maintenance records confirm the car’s condition.

0
Open recalls
NHTSA campaigns
42
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
2
Owner complaints
1 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 2 complaints on record, top 2 components.

Vehicle Speed Control1
Engine & Engine Cooling1

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 42 bulletins on record with NHTSA.

BulletinDateComponentSummary
Safety Recall 222022-04-13EquipmentLexus Safety Recall and Service Campaign - Technician Certification Requirements 4.13.2022
Lexus PRO19-02 -2022-01-12TiresPOL: This consolidated Tire Warranty Guide contains the complete warranty terms for all…
Lexus Safety Re2020-05-01EquipmentSafety Recall and Service Campaign - Technician Certification Requirements
L-SB-0179-17 Obs2020-04-06EquipmentTSB: OBSOLETE NOTICE April 06, 2020: This bulletin is now obsolete. Please see…
L-SB-0008-202020-04-06EquipmentTSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service…

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

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VIN
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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 1998 SC400 take?

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

Does the 1998 SC400 have open recalls?

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