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Thermostat Housing fit your 2001 Mercury Mountaineer 6 Cyl 4.0L 5-Speed Automatic Transmission 5R55E
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2001 Mercury Mountaineer
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6 Cyl 4.0L; 5-Speed Automatic Transmission 5R55EVehicle Options
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Part No. & Part Description
Price & Qty.
Part No. &
Part Description
Part Description
1L2Z-8255-AA
GASKET (WATER OUTLET CONNECTION)Gasket- Lower O-ring seal
- Fit Note: 6 Cyl 4.0L
- Base Number: 8255
- Callout Name: 8255
$7.42 $4.771
- 1L2Z-8255-AA
THERMOSTATGasket- Lower themostat housing O-Ring seal
- Fit Note: 6 Cyl 4.0L
- Base Number: 8255
- Callout Name: 8592
$7.42 $4.771
$3.25 $1.914
F77Z-8548-AF
HOSE (WATER BY-PASS)Tube Assy- Water pump to thermostat housing
- Fit Note: 6 Cyl 4.0L
- Base Number: 8548
- Callout Name: 8548
$17.33 $11.151
- SENDER (WATER TEMPERATURE INDICATOR ENGINE UNIT)
F1SZ-10884-A
Sender Assy - Temperature- #F1SF 10884-AA, 270
F; single contact with green insulator, 1 1/2" long, 5.0L, BEFORE 7/29/96 - Base Number: 10884
- Callout Name: 10884
$55.09 $34.541 
F7DZ-10884-AA
Sender Assy - Temperature- #F77F 10884-AA; 2 spade terminal connector, 3/8"-18 PTF SAE., 5.0L, FROM 7/29/96
- Base Number: 10884
- Callout Name: 10884
$24.73 $11.611
$10.00 $5.854
F57Z-12A697-A
SENSOR ASY. (INTAKE AIR TEMPERATURE)Sensor Assy- Fit Note: 6 Cyl 4.0L, 8 Cyl 5.0L
- Base Number: 12A697
- Callout Name: 12A697
$47.45 $29.751
- SENSOR ASY. (ENGINE COOLANT TEMPERATURE)
-W706800-S303
Retainer- Retainer for 12A648, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HX1
- Callout Name: 12A648
$17.00 $9.951 
-W702675-S300
Seal- Seal between sensor & housing, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HM1
- Callout Name: 12A648
$22.60 $13.001
F77Z-12A648-AA
Sender Assy- Rectangular connector with 2 flat pins; for seal use W702675-S300, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 12A648
- Replaced By: F8CZ-12A648-B
$32.91 $20.631
- $17.00 $9.951
$9.09 $5.851
- THERMOSTAT (WATER)-W702837-S300
"O" Ring- Ring seal 61 x 3.2 rubber, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: HR1
- Callout Name: 8575
$9.09 $5.851 
F7TZ-8575-A
Thermostat Assy- Thermostat, SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 8575
- Replaced By: YU3Z-8575-AA
$51.09 $32.031- F77Z-8A586-AE
Connection - Water Outlet- Thermostat & housing asy., SOHC
- Fit Note: 6 Cyl 4.0L
- Callout Name: 8575
- Replaced By: YU3Z-8A586-AA
$719.87 $488.071 
F7TZ-8594-A
Connection - Water Outlet- Connector - water outlet, SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 8594
- Callout Name: 8575
$165.13 $90.661
F87Z-12A647-AA
SENSOR ASY. (AMBIENT AIR TEMPERATURE)Sensor Assy- For outside temperature thermometer, w/header mounted console
- Base Number: 12A647
- Callout Name: 12A647
$194.79 $140.221
YU3Z-8A586-AA
THERMOSTAT & HOUSING ASY.Connection - Water Outlet- Complete housing with thermostat & screw in sensors. F7DZ-10884-AA & F77Z-12A648-AA., SOHC
- Fit Note: 6 Cyl 4.0L
- Base Number: 8A586
- Callout Name: 8A586
$719.87 $488.071
Genuine Ford Parts, the Right Choice
FordPartsGiant.com offers the wholesale prices for genuine 2001 Mercury Mountaineer parts. Parts like Thermostat Housing are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.0L. Transmission: 5AT 5R55E.