Miata Technical Service Bulletin

Category Applicable Model(s) Subject
Bulletin No. 004/97
Issued 03/10/97
F 1996 MX-5 Miata MIL Illumination - P0470 Stored in memory

Applicable Models/Vins

1996 MX-5 Miata


The MIL light may illuminate on some vehicles with DTC P0470 stored in memory. This may be caused by the EGR boost sensor hose disconnecting from the EGR valve.

Customers complaining of MIL light illumination should have the vehicle inspected and repaired according to this bulletin.

Repair Procedure

  1. Confirm that the host is in place on the EGR valve.
  2. Remove hose assembly.
  3. Install new hose assembly according to the illustrations below.

Parts Information

Part Number Description Quantity
BPS1-20-440A Vacuum Hose Assembly 1
9928-30-800 Hose Clamp 1

Warranty Information

(Applies to Verified Customer Complaints on vehicles covered undernormal warranty. Refer to the SRT Microfiche for warranty term information.
Warranty Type: A
Symptom code: 91
Damage code: 9G
Part number main cause: BPS1-20-440A
Quantity: 1
Operation Number: XX893XRX
Labor hours: 0.2 Hrs.

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