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2004 Isuzu Ascender 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 Ascender 4WD.

Body SUV

The 2004 Isuzu Ascender 4WD is an SUV that offers four-wheel-drive capability, though its underlying platform, engine details, and standout specifications are not documented in the available data. Without these specific metrics, the vehicle is characterized fundamentally by its SUV body type rather than granular performance distinctions. As a result, this model year's placement within the Ascender's reliability history remains unspecified, meaning its historical durability cannot be concretely determined from these facts alone.

Model year200820072004

Quick specs

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

Lug nut torque100 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 78 · 600 CCA battery, OE oil filter 8889842150. 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 78 · 600 CCAOEM · verified
Tire sizeP245-65R17OEM · verified
Wheel / rimN/A inOEM · verified

OE service part numbers OEM · verified

Engine oil filter8889842150 alt 8890173420
Engine air filter8192397130
Fuel filter8889830680
Spark plug8126816630 alt 2901230720
Front wiper blades8152143460
Serpentine belt8125764460 alt 8125764500
Thermostat8126001710 alt 8125703070

Service quick specs OEM factory data

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

Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-5-3-6-2-4. 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 Capacity5
Power Steering FluidGM PART NO. 89021184 OR EQUIVALENT
Transfer Case FluidGM PART NO. 12378508
Transfer Case Fluid Capacity3.8 Pints

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs9 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Engine Oil Pan Drain Plug19.0 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs7 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs

Ignition

Cylinder Firing Order1-5-3-6-2-4
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.060 in
Spark Plug Torque11 ft-lbs
Spark Plug Gap0.040 in
Spark Plug Torque13.0 ft-lbs

Battery & A/C

RefrigerantR134a
Oil GroupPAG
Oil Type46
Oil Capacity5.00 oz
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Fuel Pump Pressure Minimum50.0 psi
Fuel Pump Pressure Maximum57.0 psi

Brakes

Torque Caliper to Bracket85 ft-lbs / 23 ft-lbs
Torque to Knuckle133 ft-lbs / 89 ft-lbs
Minimum Pad Thickness0.039 in
Minimum Shoe Thickness0.039 in
Rotor Max Parallel Variation0.0001 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.142 in / 0.787 in
Rotor Nominal Thickness To1.142 in / 0.787 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118 ft. lbs., Step 2: 11018 ft. lbs
Cylinder Head — tightening sequence 5 stages
1M11 bolts22 ft. lbs
2M11 bolts90 degrees
3M11 bolts 1-890 degrees
4M11 bolts 9 and 1050 degrees
522
Engine Flywheel Bolts — tightening sequence 1 stages
118 ft. lbs., Step 2: 5018 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
115 ft. lbs, Step 2: 15 ft. lbs., Step 3: 1515 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1811 ft. lbs
Intake Manifold to Engine Bolts — tightening sequence 1 stages
13.7 ft. lbs., step 2: 7.43.7 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
111 ft. lbs., step 2: 1811 ft. lbs
Main Bearings — tightening sequence 1 stages
118 ft. lbs., Step 2: 18018 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 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 25,000 miEngine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel Filter (replace) · Suspension System (inspect)
Every 50,000 miTransfer Case Assembly (drain & refill)
Every 100,000 miSpark Plugs (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine 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.

1
Open recalls
NHTSA campaigns
175
Service bulletins
Manufacturer communications
2
ODI investigations
Office of Defects Investigation
64
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

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

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 Ascender 4WD. 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.

Group 78 batteryEngine oil filter 8889842150Engine air filter 8192397130Fuel filter 8889830680Spark plug 8126816630

Reference guides

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

Vehicle recalls & TSBsOBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

Does the 2004 Ascender 4WD have open recalls?

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