Foxflash user shared their successful experience using FoxFlash to perform a comprehensive tune on a BMW E91 320d (163hp) featuring the Bosch EDC16C35/C38 ECU. The project involved a Stage 1 Remap, an EGR Delete, and a Swirl Flap Delete—all performed flawlessly via Bench Mode.
Here is a breakdown of the project, why Bench Mode was chosen, and how you can replicate these results.
The Vehicle & Project Scope
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Vehicle: BMW 3 Series Touring (E91) 320d
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Engine: M47D20TUD20 (163 hp / 340 Nm stock)
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ECU Type: Bosch EDC16C38 (often structurally identical or grouped with EDC16C35 in tuning databases)
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Operations Performed:
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Remap (Stage 1): Boosting horsepower and torque for better drivability and fuel economy.
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EGR Off: Electronically disabling the Exhaust Gas Recirculation valve to prevent carbon buildup in the intake manifold.
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Flap Off: Deactivating the electronic control of the swirl flaps (a common failure point on the M47 engine that can cause catastrophic engine damage if they break and drop into the cylinders).
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Hardware Used: FoxFlash Tuning Tool
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Method: Bench Mode (Read/Write) with FoxFlash auto-checksum validation.
