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2004 Mazda B4000 Repair and Maintenance

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

2004 Mazda B4000 Problems

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.

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.

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.

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2004 Mazda B4000 Questions

runs well when traveling

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.

I drove in wet weather. overnight it froze. the truck wants to move and seems to go in gear. it will not roll in nutral or or in any gear for that matter. I think it may be ice build up or is it the clutch?

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2004 Mazda B4000 Recalls

This limited regional recall is for vehicles currently registered or first sold in southern Florida, along the Gulf Coast, Puerto Rico, Hawaii, the 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.

This limited regional recall is for vehicles currently registered or first sold in Florida, Puerto Rico, Hawaii and the U.S. Virgin Islands, and equipped with Takata-brand air bag inflators. Upon deployment the driver and/or passenger airbag inflator could rupture, increasing the risk of personal injury. Mazda dealers will replace the affected airbag inflator modules to correct this concern.

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2004 Mazda B4000 Reviews

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!

Rear brake do not last,I was told this is a constant problem with this truck B4000.

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