2004 Mazda B4000 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 Mazda B4000

2004 Mazda B4000 Problems

Crank but No Start Condition and No Spark

The engine may fail to start due to an electrically shorted sensor. Some of the sensors may internally short and not blow any fuses. A technician may find no spark and no operation of the fuel injectors in the diagnosis. One way a technician may isolate the defective sensor is by disconnecting sensors one by one to see if the engine starts.

Rough Running Idle, ABS Light Illuminated, and Check Engine Light

Water intrusion into a connector (X309) located under the cab, beneath the driver's seat, can cause a rough idle, erratic speedometer operation, ABS Light and Check Engine Light illumination, and automatic transmission shifting problems. If needed, connector repair parts are available from Mazda dealers, and possibly some Ford dealers.

Crank but No Start Condition

If the engine cranks but does not start, it may be caused by a tripped inertia switch. Switch the key to "ON" and the fuel pump should be heard running for a second or two. Listen at the gas filler if necessary. The inertia switch is located on the firewall and can be tripped when the parking brake is set too hard and then released. The inertia switch should be reset, and will click when it is reset.

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2004 Mazda B4000 Questions

I am going to purchase this vehicle what problem areas should I look for inspect (1 answer)

When truck sits in idle it runs pretty rough. (1 answer)

runs well when traveling

Steam at exhaust, engine overheating, running rough, continually adding water. (1 answer)

Going down the highway truck runs steady, when i come to a stop sign, engine starts to overheat and engine runs rough and wants to die. codes are P0304,P0455 and sometimes P0316. Changed 4 of six spark plugs, can smell antifreeze.

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2004 Mazda B4000 Recalls

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may rupture and spray metal fragments upon deployment. This is due to excessive internal pressure in the inflator. Dealers will replace the driver's frontal air bag inflator free of charge to resolve the concern.

Front Passenger Air Bag Defect

In a crash that deploys the passenger front air bag, the inflator of the air bag can rupture, causing metal debris to strike vehicle occupants. Dealers will replace the front passenger air bag inflator free of charge to correct the concern.

Front Airbag Inflator Module

This limited regional recall is for vehicles currently registered or first sold in southern Florida, along the Gulf Coast, Puerto Rico, Hawaii, Puerto Rico, Guam, and Saipan. Upon deployment the passenger airbag inflator could rupture, increasing the risk of personal injury. Dealers will replace the passenger side air bag inflator to correct this concern. Note: this supersedes recall #14V-344.

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2004 Mazda B4000 Reviews

Rear brake do not last,I was told this is a constant problem with this truck B4000.
Seats can be uncomfortable for drives longer than 30-40 minutes. I have the 4x4 and suspension is loose, nauseating for passengers - though I have no problems with it. The display under the rear view mirror went out, but all in all, a very good and reliable truck. A good beater that doesn't quit!

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