Bench · send the module by courier

Changan airbag module 3658100-CD01 – crash data reset

We clear crash data and fault codes from the Changan SRS module 3658100-CD01 – on the bench (directly on the board, JTAG). No prepayment; the price is confirmed before any work.

Make: Changan Manufacturer: BOSCH Memory: R7F701A033 Method: bench / JTAG

Order a reset ☎ +359 893 300 200

Pricefrom 60 € to 150 €no prepayment, confirmed before any work

Turnaroundthe same or the next working day after receipttracked courier across the EU

MethodBench / JTAGthe module is read directly from its memory

GuaranteeFull backup before any workif the light comes back, we read it again at no charge

Order · no prepayment

Order for module 3658100-CD01

No prepayment. We confirm the price and turnaround by phone, and the address and courier instructions arrive by e-mail right away.

30–150 € depending on the module
Back with you in 24–48 h
No charge if the module cannot be recovered

Module 3658100-CD01 details

Hardware part number	`3658100-CD01`
Vehicle	Changan (SRS / airbag module)
Module manufacturer	BOSCH
Where the crash record is stored	Renesas RH850 R7F701A033 microcontroller (data stored in the internal data flash)
How it is reset	On the bench (directly on the board, JTAG)
Price	from 60 to 150 € depending on the module, confirmed before any work
Turnaround	The same or the next working day after receipt
Support	Full

What we do with module 3658100-CD01

Crash data reset

We erase the crash record so the module works again after the deployed airbags and pretensioners have been replaced.

Reading and clearing fault codes

We read the SRS module codes (B-codes), check which are active and clear them after the repair.

EEPROM / data flash read and write

We keep a full backup of the memory before any work and restore it if needed.

FLASH read and write

Work with the module firmware – for recovery or transfer to another module with the same part number.

Full module backup

Reading and writing all data – cloning to a working module with the same part number.

Module identification

We read the part number, software version and VIN so we are sure we work with the right record.

Boot mode read and write

Access to the module even with damaged software.

Safety first: we reset crash data only when the deployed components (airbags, belt pretensioners, crash sensors) have been replaced. A module with an erased record but old components will not protect the occupants in the next crash. Before the reset we read all fault codes and tell you what still needs replacing. Disconnect the battery and wait at least 10 minutes before removing the module.

How it works for Changan with this module

You order through the form or by phone. You receive the address and packing instructions.
You remove the module after disconnecting the battery and waiting 10 minutes.
You send it by tracked courier from anywhere in the EU. We also accept an enquiry with a photo of the label.
We connect it on the bench – directly to the microcontroller via JTAG, no desoldering. We clear the crash data and the fault codes.
We ship it back by tracked courier the same or the next working day. On refitting, check the other control units for a stored crash.

When it is needed

After a crash with deployed airbags or pretensioners – the module keeps the record and will not re-arm the system.
After a lighter impact where only the belt pretensioners fired – the light stays on although the airbags are intact.
With a used module from another vehicle that has a stored crash.
With an imported car that arrives with an airbag light and a crash record in its history.

What a reset does NOT fix

A damaged airbag, pretensioner or crash sensor – they set a new fault immediately.
A broken wire or corroded connector under the seat – the most common reason for the light without a crash.
A module with a burnt board after a short circuit – for Changan we then source a module with the same part number and clone it.

Other Changan airbag modules by BOSCH with R7F701A033 memory

Same module family – handled the same way as 3658100-CD01.

All Changan airbag modules →

Frequently asked questions

Do I have to remove module 3658100-CD01?

Yes. This module is handled only on the bench – it is connected directly to the board. Send it by tracked courier; we ship it back the same or the next working day. Disconnect the battery and wait a few minutes before removal.

Why is the airbag light still on after the reset?

Because crash data is not the only cause. If an airbag, pretensioner, crash sensor or connector is damaged or has not been replaced, the module logs a new fault. That is why we read all fault codes before the reset and tell you what still needs replacing.

Can you clear the crash data without replacing the airbags?

We do not. The module stores the record because the components have fired. We reset it only once the airbags and pretensioners have been replaced; otherwise the system will not protect the occupants in the next crash.

How much does the reset of module 3658100-CD01 cost?

The price depends on the method (OBD or bench) and whether there are other faults. We confirm it by phone from the part number before we start. No hidden costs – if the module is faulty and cannot be recovered, you do not pay for the attempt.