CEM Data Transferring Service – Volvo Models (1999–2004)
PART NUMBERS SUPPORTED:
9494594, 9494337, 9469636, 9452596, 9452553, 9452475, 8688513, 8688436, 8688434, 8645719, 8645716, 8645205, 8645200, 8645171, 30657629, 9186793

Service Description:
This service transfers your original immobilizer and vehicle data from a defective Central Electronic Module (CEM) to a good, used replacement unit. CEM data transfer can resolve a wide range of electrical issues caused by failed internal components.

Common Failures Fixed by This Service:
CAN-BUS communication issues, including:

Instrument cluster shutdown

Inoperative power windows, sunroof, ABS, or transmission modules

Relay operation faults, such as:

Non-functioning lights, wipers, horn, or starter

Intermittent failure of turn signals or fuel pump relay

Battery drain due to CEM not going into sleep mode

Symptoms of CEM Failure:
Dashboard cluster drops out while driving

Power accessories stop working intermittently

No response from diagnostic tools

Vehicle starts with unpredictable behavior (e.g., hard shifting, warning lights)

How the Process Works:
After checkout, print your order receipt (contact/shipping info included).

Send us:

Your original defective CEM

A replacement CEM you’ve sourced (must have one of the supported part numbers listed above)

We will:

Transfer your data

Test the module

Return-ship your replacement CEM within 1 business day

Data from your original CEM will be securely archived. If requested, we can email you the data file.

Important Note About Part #8688513
While part number 8688513 is officially compatible with some 2004 models, we do not recommend using it as a donor or replacement CEM.

This recommendation is based on consistent field experience and reports from independent Volvo service specialists. Units with this part number have shown a notably high failure rate, with issues such as:

Intermittent loss of CAN-BUS communication

Faulty relay operation

Internal processor overheating

Volvo has not issued a formal recall for this module; however, many experienced repair facilities choose not to reuse it due to long-term reliability concerns.

For the most dependable results, please use a replacement CEM from the list above excluding 8688513.

CEM Compatibility:
1999–2004 Volvo S80

2001–2004 Volvo V70

2003–2004 Volvo XC70

2003–2004 Volvo XC90

2002 Volvo S60

(Always confirm visual and electrical compatibility before purchase.)

📄 Terms & Conditions:
By purchasing this service, you confirm the following:

Your vehicle has been properly diagnosed, and the CEM is the root cause of the issue.

You are supplying a replacement CEM that matches visually and electrically and is presumed functional.

If the replacement unit is faulty and data transfer is not possible, we will contact you to discuss options.

Core return shipping (if requested) is subject to a flat $15 fee.

❗ Disclaimer:
We are an independent business not affiliated with Volvo Cars, Volvo Group, or any of their subsidiaries or dealers. All trademarks including Volvo® are the property of Volvo Trademark Holding AB. Part numbers, model names, and compatibility references are used strictly for identification and application purposes.

Any opinions, technical insights, or recommendations regarding part reliability (e.g., part #8688513) are based solely on independent service experience, third-party industry findings, and user reports—not official manufacturer declarations.