Mazda›B-Series›2004›Overview/mazda/b-series/2004/base/

2004 Mazda B-Series

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2004 B-Series.

Body TRUCK

Operating within a production run from 1996 to 2009, the 2004 Mazda B-Series truck is documented with 3 recalls and 49 total owner complaints, primarily involving air bags. This complaint volume places the model year between the generation's peak of 80 issues in 1999 and its minimum of 4 in 2009. Such positioning indicates a moderate standing in the vehicle's overall reliability history, avoiding both the highest and lowest extremes recorded for the nameplate.

Model year2010 2009 2008 2007 2006 2005 2004 2003 2002

Quick specs

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

Lug nut torque87-108 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 59 · 540 CCA battery, OE oil filter LF8J14302. 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 59 · 540 CCAOEM · verified

Tire sizeP225-70R15OEM · verified

Wheel / rim7-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	LF8J14302
Engine air filter	1F7023603
Fuel filter	1F7013470A
Spark plug	1F2018110D
Battery	0000800059WB
Front wiper blades	1F2067330
Serpentine belt	1F2318381 alt 1F2018381
Thermostat	LF0315165A alt L35715170B

Service quick specs OEM factory data

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

This engine 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 87-108 ft-lbs. The firing order is 1-4-2-5-3-6. 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 Fluid	ATF
Automatic Transmission Fluid Capacity	10
Brake Fluid	DOT 3
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	5 Pints
Manual Transmission Fluid	ATF
Manual Transmission Fluid Capacity	5.5
Power Steering Fluid	ATF

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	11-13 ft-lbs
Connecting Rod (Large End) Bearings	23-28 ft-lbs
Crankshaft Pulley and/or Damper Bolts	71 ft-lbs
Engine Flywheel Bolts	54-64 ft-lbs
Intake Manifold to Engine Bolts	13 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	40 ft-lbs
Intake Manifold to Engine Bolts	Lower: 21 ft-lbs; Upper: 7.4 ft-lbs
Intake Manifold to Engine Bolts	7.4 ft-lbs

Chassis torques

Leaf Spring to Chassis Bracket	148.0 ft-lbs
Leaf Spring to Rear Shackle	85.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket	76.0 ft-lbs
Lug Nuts	87-108 ft-lbs
Transfer Case Fill Plug	18.0 ft-lbs
Transfer Case Drain Plug	18.0 ft-lbs
Front Wheel Hub	162 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-4-2-5-3-6
Curb Idle Speed (No Load)	650 rpm
Curb Idle Speed Variance (No Load)	50 rpm
Curb Idle Speed (No Load)	MT: 815, AT: 900 rpm
Curb Idle Speed Variance (No Load)	MT: 15, AT: 20 rpm
Curb Idle Speed (No Load)	900 rpm
Curb Idle Speed Variance (No Load)	100 rpm

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	2.06 lbs
Oil Group	PAG
Oil Type	SP-20
Oil Capacity	9.00 oz
Standard BCI Group Number	59
Standard BCI Cranking Performance	540 cca
Standard BCI Group Number	59

Service checks

Key ON Engine OFF (KOEO)	60-65 (140)
Key ON Engine OFF (KOEO)	40-65
Injector Primary Resistance	11.4-12.6 @ 68 degreesF ohms
Engine Oil Pressure	40-60 psi
Engine Oil Pressure RPM	2000-3000 rpm
Intake Valve Lash	Hydraulic in
Exhaust Valve Lash	Hydraulic in

Brakes

Torque Caliper to Bracket	21-26 ft-lbs
Torque to Knuckle	85 ft-lbs
Torque Caliper to Bracket	21-26 ft-lbs
Torque to Knuckle	85 ft-lbs
Rotor Max Parallel Variation	0.0004 in
Rotor Runout Limit	0.003 in
Rotor Nominal Thickness From	1.04 in
Rotor Nominal Thickness To	1.04 in

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages

62 inch lbs., Step 2: 12

62 in

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

15 ft. lbs., Step 2: 90

15 ft. lbs

Cylinder Head — tightening sequence 5 stages

Prep B Series, Use new bolts.

1	44 ft. lbs.	44 ft. lbs
2	11 ft. lbs.	11 ft. lbs
3	33 ft. lbs.	33 ft. lbs
4	90 degrees.	90 degrees
5	90 degrees.	90 degrees

Cylinder Head — tightening sequence 4 stages

1	59 ft. lbs	59 ft. lbs
2	back off a minimum of 1 turn.
3	33-41 ft. lbs.	33–41 ft. lbs
4	63-73 ft. lbs.	63–73 ft. lbs

Cylinder Head — tightening sequence 3 stages

1	24 ft. lbs.	24 ft. lbs
2	80 degrees.	80 degrees
3	80 degrees.	80 degrees

Engine Flywheel Bolts — tightening sequence 1 stages

37 ft. lbs., Step 2: 50 ft. lbs., Step 3: 83

37 ft. lbs

Engine Flywheel Bolts — tightening sequence 1 stages

10 ft. lbs., Step 2: 52

10 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

8 ft. lbs., step 2: 17

8 ft. lbs

Oil Pump to Cylinder BLock Bolts/Studs — tightening sequence 1 stages

7 ft. lbs., Step 2: 17

7 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 100,000 mi; coolant at 45,000 mi. The big-interval services (at 45,000 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 mi	CV Joint Boot (inspect) · Clutch Master Cylinder (inspect fluid level) · Driveshaft U-Joint (lubricate)
Every 5,000 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 10,000 mi	Tire & Wheel Assembly (rotate)
Every 15,000 mi	Brake Drum Assembly (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Clutch Master Cylinder (inspect fluid level) · Disc Brake Caliper Guide Pin (lubricate) · Driveshaft U-Joint (lubricate)
Every 30,000 mi	Engine Air Filter Element (replace) · Fuel Filter (replace) · Transmission Assembly (inspect fluid level)
At 45,000 mi	Engine Coolant System (drain, flush & refill)
Every 50,000 mi	Engine Coolant System (drain, flush & refill)
Every 60,000 mi	Wheel Bearing (inspect)
Every 100,000 mi	Accessory Drive Belt (inspect) · PCV Valve (replace) · Spark 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 2004 Mazda B-Series marks a notable uptick in federal scrutiny within its generation, with complaints rising sharply to 49 from the previous year’s low of 22—a trend that reverses the steady decline observed from 1999 to 2003. This year also sees the highest number of investigations (3) for the model line, alongside three recalls, suggesting emerging or unresolved issues not present in earlier years. While airbag-related complaints dominate (20 of 49), the data does not specify root causes, though the spike in investigations implies systemic concerns rather than isolated incidents. Compared to 2005, which saw complaints halve to 22 and investigations remain elevated, the 2004 model appears to be a transitional year where problems were identified but not yet fully addressed. The absence of fire-related complaints is a positive outlier, but the overall pattern suggests heightened risk. **Takeaway: The 2004 B-Series is a weaker choice within the generation, as its complaint and investigation volumes signal potential reliability gaps best avoided in a used purchase.**

Open recalls

NHTSA campaigns

102

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

9 involved a crash · 0 a fire

Owner complaints by model year NHTSA · this generation & adjacent

’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03’04’05 ’06 ’07 ’08 ’09

Owner complaints filed with NHTSA, by component

All 49 complaints on record, top 8 components.

Air Bags20

Engine & Engine Cooling11

Fuel System, Gasoline3

Tires2

Air Bags,Equipment2

Electrical System2

Suspension,Structure1

Air Bags,Structure1

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 102 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
SA-029-26	2026-04-21	Power Train	This Service Alert supersedes the previously issued SA listed below: The changes are…
09-038-24	2024-08-08	Electrical System	In accordance with Federal regulations, follow the procedure listed below when replacing…
SA-011-24b	2024-07-29	Unknown Or Other	Mazda has developed factory recommended scheduled maintenance services that support all…
SA-011-24a	2024-06-07	Unknown Or Other	Mazda has developed factory recommended scheduled maintenance services that support all…
SA-011-24	2024-02-12	Steering	Mazda has developed factory recommended scheduled maintenance services that support all…

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 B-Series. 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 59 battery Engine oil filter LF8J14302 Engine air filter 1F7023603 Fuel filter 1F7013470A Spark plug 1F2018110D

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

Does the 2004 B-Series have open recalls?

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