Back to 2023 BMW i7

2023 BMW I7

M70 Dual Motor AWDAWDAUTOMATICev
10 active safety recalls on this vehicle — view recalls
Repairs0Labor407Torque3308Fluid8DTC564Battery0Maintenance0Recalls10
P1747high severityPowertrain

Transmission Failsafe Relay Fault

on 2023 BMW i7 M70 Dual Motor AWD · AWD

What this code means

The DME or EGS (Electronic Gearbox Control) detected a fault in the transmission failsafe relay circuit. This relay controls power to the transmission solenoids and its failure can leave the transmission in a default safe mode.

Symptoms

  • Transmission stuck in one gear
  • Transmission failsafe mode activated
  • Check Engine Light
  • Harsh or no shifting
  • Transmission warning light

Common causes

  • Faulty transmission failsafe relay
  • Relay connector corrosion
  • Wiring fault to relay
  • EGS module failure
  • Blown relay fuse

Diagnostic steps

  1. Test relay operation with multimeter
  2. Check relay fuse
  3. Inspect relay connector for corrosion
  4. Test power supply to relay
  5. Swap relay with known-good unit

Repair notes

Replace the transmission failsafe relay and inspect associated wiring.

Other Powertrain codes on this vehicle

Building an app?
Free API access to all this data — 50 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →