Nissan Sentra Antitheft System Control Module Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a Nissan Sentra antitheft system control module replacement is between $315 and $338. Labor costs are estimated between $88 and $111 while parts are priced at $227. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How does an Anti Theft System Control Module work?

Earlier systems used only a resistor in the ignition key. This resistor would intercept voltage from the anti theft control module, and return a modified voltage, signaling that it was the proper key. Now, transponders are used, and the Anti Theft module can actually read information from the key like an RFID tag. This information has to match the information in the anti theft control module exactly, and in some cases, the body control module will play a role in validating this information before sending the signal to the powertrain control module to start the engine. In all cases, the basic function of the anti theft control module is to disable the vehicle or sound the alarm when an improper key is used to access the vehicle or attempt to start the engine.

What are the symptoms of a bad Anti Theft System Control Module?

Everyone has heard a car honking wildly in a parking lot with all of the exterior lights flashing, and many people have tried to unlock their door or start their engine to find that their car has become that car. Besides the obnoxious honking and flashing lights, clicking relays will be heard inside the cabin of the vehicle, plus some sort of security light will illuminate of blink, and a message may appear on the instrument cluster to inform you of the security issue. Vehicles equipped with satellite connected alarms will be placed in contact with a representative from the service provider, and the engine may crank but not start, or do nothing. Luckily, the radio should function just fine, as well as other accessory systems.

Can I drive with a bad Anti Theft System Control Module?

If the anti theft control module has failed, the vehicle will need repair before it can be operated. If the vehicle returns to its normal state after several attempts to start or enter the vehicle, it is still recommended to bring the vehicle for diagnostics, as the problem will likely return. Note, no matter which part of the anti-theft system is defective, the result will immobilization unless the system recognizes the proper key.

How often do Anti Theft System Control Modules need replacement?

Anti Theft control module replacement is mostly due to physical damage, not internal failure. Many times these control modules are mounted under seats and consoles, so they are subject to being kicked, spilled on, and corrosion. The majority of failures from internal faults will be very new and very old vehicles, as a result of defects in workmanship or degradation over time.

How are Anti Theft System Control Modules replaced?

Replacing the anti theft control module will include removing interior body panels, trim, carpeting, or the instrument cluster in order to gain access. This may have already taken place during the diagnostic procedure for hands-on testing. If the anti theft control module is part of another unit, like the instrument cluster, for instance, the entire unit will need to be replaced. When the Anti Theft module is a stand-alone unit, it can be replaced by removing fasteners and electrical connections, installing the new unit, and reconnecting the electrical connections. Afterwards, the control module will require programming to match the data to the rest of the control modules in the vehicle.

RepairPal Recommendations for Anti Theft System Control Module issues

If you cannot get the alarm to shut off, we recommend disconnecting the battery until help arrives. This will prevent the battery from being drained by the many components activated by the anti theft control module, and allow the locksmith or roadside assistance personnel to better and more quickly assist you.

What to look out for when dealing with Anti Theft System Control Module issues

It is not recommended to attempt to bypass the factory alarm, as the anti theft control module is extremely difficult to "trick", and the repair may involve replacing one of many components of the anti theft system. This means that even if the bypass were to work properly, the failed component could still be part of the system, thus causing the security alert to continue.

Can I replace the Anti Theft System Control Module myself?

Anti Theft systems are extremely difficult to diagnose without factory software and years of experience. In nearly all situations, if an automotive locksmith cannot find the issue, it will need to be taken to a factory authorized repair facility for the make of the vehicle.