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Audi A8 4.0 TDI V8 Quattro original file Bosch · 4E0907409B · SW 368451
Turbo diesel · 275 hp (202 kW)
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Dyno sheet
- Power
- 275 hp
- Torque
- 650 Nm
Typical crank figures for a healthy 4.0 V8 TDI. Results depend on the car's condition, fuel and parts.
- Power
- 275 hp 202 kW
- ECU
- Bosch
- Engine
- 4.0 V8 TDI Turbo diesel · 3,936 cc · 8 cyl
- File
- 1 MB BIN, ready to write
Bosch on the Audi A8 4.0 TDI V8 Quattro
- ECU
- Bosch EDC16C4
Software and hardware
- Part number
- 4E0907409B Audi's part number for this ECU, printed 4E0 907 409 B
- Software
- 368451 (1037368451) The software inside: your read must show this number
How the Bosch is read: OBD and Bench
Built on request for the Audi A8 4.0 TDI V8 Quattro
- DPF off
- EGR off
- DTC off
- Speed limiter (Vmax) off
- Swirl flaps off
Request a custom solution Any file £50, from £30 in packs, every option in the one price.
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- Read the file on your computer
- Look for it in our files
- Upload it, kept private
- Compare it with this file
From read to write
- Read the ECUKeep the read: it is your way back.
- Match the numberspart number 4E0907409B and software 368451
- Pay and downloadThe file is in your account straight away.
- Write it backThe way you read it. Not right for your car? We correct it free.
Before you write the file
- A battery charger on the car: a write takes minutes and the voltage must not drop.
- Your own read saved twice, on two different drives: it is your way back.
- Your read shows part number 4E0907409B and software 368451 (1037368451), the same as this file.
- Fault codes read and noted before the write, and cleared after it.
- The same tool and connection (OBD and bench) you read the ECU with.
About this file
What this original file is
This is the factory calibration of the Audi A8 4.0 TDI V8 Quattro (202 kW, 275 hp), for its Bosch ECU with part number 4E0907409B and software 368451 (1037368451). Use it to put the car back to standard, to recover the ECU after a failed write, or as the base of a tune of your own.
An original holds every map as the factory wrote them: injection quantity and timing, boost and rail pressure, the torque and smoke limiters, the speed limiter and the emissions controls. Tuners start a file from it; workshops use it to put a car back to standard.
The Audi A8 4.0 TDI V8 Quattro carries the 4.0 V8 TDI engine, 275 hp and 650 Nm from the factory. On this engine, Stage 1 usually gives about 325 hp and 770 Nm (+50 hp, +120 Nm). Typical figures for a healthy engine: your car's own result depends on its condition, fuel and parts.
For software 368451 of the Audi A8 4.0 TDI V8 Quattro we sell the original, Stage 1, Stage 2 and Stage 3. Stage 1 and Stage 2 each come in two versions, tuned from different reads of this software. Every file downloads straight after payment.
The Bosch ECU in this car is read and written over OBD and on the bench, with tools such as Autotuner and CMD Flash. Keep your own read: compare its hardware and software numbers with the ones on this page before you write the file.
The same 4.0 V8 TDI engine with the same ECU is fitted to the Audi A8 D3: their file can be the same, so check the software number of your read.
DPF off, EGR off, DTC off, speed limiter (Vmax) off and swirl flaps off can be built on this file on request, for off-road and competition use: send us your read through our file service and our engineers add them (any file £50, from £30 in packs).
Software 368451 (1037368451) is the calibration inside the Bosch ECU. Part number 4E0907409B is the car maker's number for this ECU.
Questions
Which ECU does this Audi A8 4.0 TDI V8 Quattro original file fit?
A Bosch ECU with part number 4E0907409B and software 368451 (1037368451). Check those numbers in your read before you write it; another software number needs another file, which our engineers can build from your read.
How is the Bosch ECU read and written?
Over OBD and on the bench, with tools such as Autotuner and CMD Flash. Write the file back the same way you read the ECU, and keep your original read.
What does Stage 1 give on the Audi A8 4.0 TDI V8 Quattro?
Usually about 325 hp and 770 Nm against 275 hp and 650 Nm stock (+50 hp, +120 Nm). Typical for a healthy engine, never a promise for one car.
Can you add DPF off and EGR off to the Bosch ECU file?
Yes, on request, for off-road and competition use: DPF off, EGR off, DTC off, speed limiter (Vmax) off and swirl flaps off. Upload a read through our file service and an engineer builds it (any file £50, from £30 in packs). The buyer is responsible for using it where the law allows.
What exactly is in the download?
A BIN file of 1 MB, ready to write. Write it with the same tool and the same connection you read the ECU with.
How do I get the file after paying?
It is in your account as an instant download straight after payment by card, Apple Pay or Google Pay: the BIN file, ready to write.
What if the file does not fit my car?
Send us your read and we correct it free, as many times as it takes. Questions before you buy are answered by a tuner on WhatsApp.
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