OBD Guide
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B1D87

Seat Backrest Motor Control Circuit Peformance

B1D87 is an OBD-II diagnostic trouble code meaning: Seat Backrest Motor Control Circuit Peformance. Common causes: open or short circuit in wiring harness, backrest motor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Seat back adjustment does not work
  • Intermittent operation of the backrest motor
  • Protection triggers when trying to adjust

Causes

  • Open or short circuit in wiring harness
  • Backrest motor malfunction
  • Poor contact in connectors
  • Problems with the seat control module
  • Mechanical damage to the adjustment mechanism

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the condition of connectors and contacts
  3. Check the operation of the electric motor
  4. Check the adjustment mechanism for jamming
  5. If necessary, replace the motor or control module

Related codes

B1D88B1D89B1D8A

FAQ

What does the B1D87 code mean?

B1D87 is an OBD-II diagnostic trouble code that indicates: Seat Backrest Motor Control Circuit Peformance

What causes a B1D87 error code?

The most common causes of B1D87 include: Open or short circuit in wiring harness; Backrest motor malfunction; Poor contact in connectors; Problems with the seat control module.

How do I fix a B1D87 diagnostic trouble code?

To fix B1D87: Check the integrity of the wiring harness. Check the condition of connectors and contacts. Check the operation of the electric motor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D87?

Do not drive — repair immediately

How much does it cost to fix B1D87?

The estimated repair cost for B1D87 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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