Air Intake Chamber Box Breakage (11-59-00)

Publication date: 2000-12-25
Reference number: 11-59-00

AIR INTAKE CHAMBER BOX BREAKAGE

TECHNICAL SERVICE BULLETIN

Reference Number(s): 11-59-00, Date of Issue: February 25, 2000

AIR INTAKE CHAMBER BOX BREAKAGE

Model(s): 1999 Subaru Legacy, Impreza, Forester

Group: 11 - Emission System

Bulletin No.: 11-59-00

Date: February 25, 2000

SERVICE INFORMATION

If you should encounter one of the applicable vehicles with a damaged Air Intake Box, please refer to the information below. Symptoms that occur on a vehicle with a damaged Air Intake Box may include, but are not limited to, "start-up and stall" or "check engine" warning light activation.

Additionally, the customer may have noticed a backfire during a cold start, with a partially open throttle. It will be necessary to inspect the air intake chamber and related parts. (See Fig 1 ). Replacement parts are available through normal parts distribution channels.

There are two different modifications to correct this condition. It will be necessary to read all of the following information before ordering any modified parts. Some of the vehicles may require an ECM and an Air Filter, while other vehicles may only require the ECM.

1) INSTALLING AN AIR FILTER INTO THE AIR INTAKE CHAMBER

(Part Number: 16546AA070)

The Air Filter will not require regular replacement unless it is removed for some other reason in the future. (See Chart 1).

CHART 1 - STARTING VINS FOR VEHICLES WITH AIR FILTERS

Model	Model Year	VIN
Impreza 2-door Coupe	99MY	XG401752 and after
Impreza 4-door Sedan	99MY	XG502449 and after
Impreza Sport wagon	99MY	XG809977 and after
Forester Wagon	99MY	XH731108 and after
Legacy 4-door Sedan	99MY	X7261413 and after
Legacy Station Wagon (Step roof)	99MY	X7644965 and after

The above chart indicates the starting VIN numbers for vehicles with Air Filters installed during original production into the Air Intake Chamber. Note: If the vehicle you are working on has a VIN number listed before the VIN numbers in Chart I, it will be necessary to install an Air Filter.

2) INSTALL A MODIFIED ECU

Please refer to Chart 2 (below) for the correct ECU part number that will be needed for installation:

CHART 2 - ECUS EFFECTED

Vehicle	Modified ECU
1999 Legacy LHD FED SPEC .2.2	22611 AD65D
1999 Legacy RHD FED SPEC .2.2	22611 AD66D
1999 Forester CAL SPEC.	22611 AE861
1999 Forester FED SPEC.	22611 AE851
1999 Impreza CAL SPEC. 2.5	22611 AE551
1999 Impreza FED SPEC. 2.5	22611 AE541
1999 Impreza FED SPEC. 2.2	22611 AE513

NOTE: The only vehicles that had the modified control unit installed during production were:

1999 Forester CAL SPEC. 2.5 5SP after VIN Number XG749938

Fig 1: Air Cleaner Chamber