Airbag control unit with part number SH23LAZAE

What is the function of the SH23LAZAE airbag control unit?

The SH23LAZAE airbag control unit is the central control module for the occupant restraint system (SRS) in the second-generation Chrysler Neon (1999–2005). It processes signals from acceleration and seat‑occupancy sensors to precisely deploy airbags and pretensioners in the event of a crash, while also storing relevant crash data.

As the brain of the passive safety system, this control unit continuously monitors all connected components. It analyzes data from collision sensors in real time to assess the severity of an impact. Based on this analysis, the unit determines within milliseconds which restraint systems—such as front airbags or seatbelt pretensioners—should be activated to provide optimal protection for occupants.

In addition, the SRS module performs a self‑test every time the vehicle is started. If any system faults are detected, the airbag warning light on the instrument panel illuminates to alert the driver.

Why does the SH23LAZAE control unit fail? Common malfunctions.

The most frequent cause of failure for the SH23LAZAE control unit is the storage of crash data after a collision, which locks the device. Other causes include internal electronic faults that trigger a lit airbag warning light, as well as, more rarely, water damage or complete communication failure.

After an airbag deployment, the control unit permanently stores the crash data and becomes internally disabled—a manufacturer‑imposed safety measure. The unit must be professionally reset to restore full functionality of the airbag system.

A lit or flashing airbag warning light without a prior crash often indicates an internal hardware fault. Possible causes include defective electronic components such as capacitors or other parts on the circuit board. Less commonly, water ingress or general electrical malfunctions can lead to failure.

It’s important to have a preliminary check performed at a specialized workshop. The control unit isn’t always the root cause; faulty sensors, seat‑occupancy mats, or cable breaks can produce similar symptoms. A thorough diagnosis helps avoid unnecessarily removing and shipping a fully functional unit.

How do you recognize a defect in the SH23LAZAE control unit?

A defect in the SH23LAZAE control unit primarily manifests as a constantly illuminated or flashing airbag warning light in the cockpit. Another clear indication is when the control unit cannot be read by a diagnostic tool, resulting in a loss of communication.

The most noticeable symptom is the active SRS warning light, which fails to extinguish after starting the vehicle, signaling a serious malfunction in the restraint system that requires immediate inspection.

Another common sign is a complete loss of communication. When a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit, strongly suggesting an internal fault within the control module.

In which vehicles is the SH23LAZAE installed?

The airbag control unit with part number SH23LAZAE was specifically developed for the second-generation Chrysler Neon, covering both the original version and the facelift model produced in the late 1990s and early 2000s.

At Airbag24, we specialize in repairing the SH23LAZAE control unit exclusively for these models:

Chrysler Neon 2nd Generation (model years 1999–2002)

Chrysler Neon 2nd Generation Facelift (model years 2002–2005)

How is the SH23LAZAE professionally repaired?

Professional repair of the SH23LAZAE control unit at Airbag24 involves a systematic process to identify faults, erase stored crash data, and replace defective electronic components. Following a final functional test, the unit is returned in factory‑original condition.

After removal and shipment of the control unit to Airbag24, the fault memory is first read out, and the stored crash data analyzed to pinpoint the exact cause of the malfunction.

The subsequent repair includes safely erasing the crash data to unlock the control unit. For hardware defects, specific faulty electronic components on the circuit board are identified and replaced with high‑quality new parts. Finally, each unit undergoes a comprehensive functional test to ensure flawless operation.

We offer a 12‑month warranty on all repairs.

Is it worth repairing the SH23LAZAE control unit?

Yes, repair is the most economical and sensible solution. You save 70–90% compared to purchasing a new unit, which can cost up to €750. Additionally, there’s no need for reprogramming, as the original control unit—tuned specifically to your vehicle—remains intact.

A key advantage is that the repaired original control unit is ready for immediate use (“plug-and-play”). It does not require time-consuming reprogramming to your vehicle, saving both workshop costs and time. You receive your own fully functional unit, configured specifically for your vehicle.

Should a repair prove impossible in rare cases, a remanufactured replacement unit can often be offered. This ensures that a cost-effective solution is available for almost every situation.

What shipping options are available at Airbag24?

Airbag24 offers flexible, customer-friendly shipping options. You can send your defective control unit free of charge or arrange a convenient UPS pickup. Return shipping via UPS Standard is also free, with optional express and cash-on-delivery services for maximum flexibility.

For outbound shipping, you can either send the unit to us yourself at no cost or request a UPS pickup at your preferred location. For returning your repaired control unit, several options are available: free UPS Standard shipping, fast UPS Express shipping, and both options with cash-on-delivery service. Alternatively, on-site self-collection is also possible.