CartRemove itemThumbnail imageProductPriceQuantitySubtotal × Audi S3 ECU Software Upgrade + TCU Software Upgrade (In-House Flash) $1,604.99 Audi S3 ECU Software Upgrade + TCU Software Upgrade (In-House Flash) quantity $1,604.99 (incl. tax) Coupon: Apply coupon Update cart Cart totalsSubtotal$1,604.99 (incl. tax)Service / Financing / Processing$68.69Total$1,673.68 (includes $109.49 Tax)- Proceed to checkout