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Service bulletin BC3494972301

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id51487
Published by NHTSA1997-06-27
Manufacturer's numberBC3494972301
Manufacturer's date1997-01-23
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

NHTSA's summary

VARIOUS VEHICLES MAY EXPERIENCE A HIGH PITCHED WHISTLE DURING HEAVY ACCELERATION AT 3800-5000 RPM WHEN ENGINE IS WARM- TO FIX, REMOVE EXISTING MUFFLER AND REPLACE WITH SAME PART. *JD

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions, Exhaust manifold, pipes and muffler

Vehicles listed
FORD EXPLORER1997
MERCURY MOUNTAINEER1997

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
BC10195972301997-06-27. Service bulletin. EXHAUST NOISE HEARD IN THE PASSENGER COMPARTMENT MOST PRESENT A TIP-IN A ND CRUISE AFTER SSM 5238 HAS BEEN PERFORMED. *JD
BC10192972301997-06-27. Service bulletin. VEHICLES MAY EXPERIENCE A HIGH PITCHED WHISTLE DURING HEAVY ACCELERATION AT 3800-5000 RPM WHEN ENGINE IS WARM. *JD
BC34819723011997-06-27. Service bulletin. EXHAUST NOISE HEARD IN THE PASSENGER COMPARTMENT MOST PRESENT AT TIP-IN A ND CRUISE AFTER SSM 5238 HAS BEEN PERFORMED. *JD
BC52389611011997-06-17. Service bulletin. VEHICLE MAY EXHIBIT AN EXHAUST MANIFOLD IMPINGEMENT NOISE. *TW
BC04819611131997-06-17. Service bulletin. VEHICLES MAY EXHIBIT AN EXHAUST MANIFOLD IMPINGEMENT NOISE. *TW