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2003 Mercury Grand Marquis

2003 Mercury Grand Marquis Heater Hoses

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Heater Hose - Rubber, Direct Fit, Sold individually
Part Number: CTT65004
Guaranteed to Fit
$76.99
Vehicle Fitment
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Heater To Valve; Pipe To Water Pump; With Auto Temp Control
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Heater To Valve; Pipe To Water Pump; With Auto Temp Control
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Heater To Valve; Pipe To Water Pump; With Auto Temp Control
Product Details
Location : Cut to FitNotes : 0.63 in. End 2 Hose ID; 0.63 in. Hose 1 IDMaterial : RubberLength : 600 in.Product Fit : Direct FitWarranty : 5 Year Continental Limited WarrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsRecommended Use : OE Replacement
Motorcraft OE Replacement Heater Hose - Direct Fit, Sold individually
Part Number: MIKH428
Guaranteed to Fit
$41.99
Vehicle Fitment
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Inlet; Supply Line
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Inlet; Supply Line
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Inlet; Supply Line
Product Details
Product Fit : Direct FitReplaces OE Number : 18472BWarranty : 2-year or unlimited-mile Motorcraft limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Motorcraft OE Replacement
Heater Hose - Rubber, Direct Fit, Sold individually
Part Number: CTT63083
Guaranteed to Fit
$14.99
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Valve To Intake Manifold; With Auto Temp Control
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Valve To Intake Manifold; With Auto Temp Control
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Valve To Intake Manifold; With Auto Temp Control
Product Details
Notes : 0.75 in. End 2 Hose ID; 0.75 in. Hose 1 IDMaterial : RubberLength : 21.68 in.Product Fit : Direct FitWarranty : 5 Year Continental Limited WarrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsRecommended Use : OE Replacement
Heater Hose - Rubber, Direct Fit, Sold individually
Part Number: CTT64122
Guaranteed to Fit
$20.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Heater Outlet
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Heater Outlet
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Heater Outlet
Product Details
Notes : 0.69 in. End 2 Hose ID; 0.56 in. Hose 1 IDMaterial : RubberLength : 12.5 in.Product Fit : Direct FitWarranty : 5 Year Continental Limited WarrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsRecommended Use : OE Replacement
Motorcraft OE Replacement Heater Hose - Direct Fit, Sold individually
Part Number: MIKH275
Guaranteed to Fit
$30.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Inlet, Supply
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Inlet, Supply
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Inlet, Supply
Product Details
Product Fit : Direct FitReplaces OE Number : 18472Warranty : 2-year or unlimited-mile Motorcraft limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Motorcraft OE Replacement
Heater Hose - Steel, Direct Fit, Sold individually
Part Number: GATHHA133
Guaranteed to Fit
$34.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L GAS, Heater Return Pipe
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L GAS, Heater Return Pipe
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L GAS, Heater Return Pipe
Product Details
Notes : MoldedMaterial : SteelLength : 33.375 in.Product Fit : Direct FitWarranty : Lifetime Gates limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE Replacement
Motorcraft OE Replacement Heater Hose - Direct Fit, Sold individually
Part Number: MIKH147
Guaranteed to Fit
$49.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Heater Core To 18B42, Return, Outlet
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Heater Core To 18B42, Return, Outlet
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Heater Core To 18B42, Return, Outlet
Product Details
Product Fit : Direct FitReplaces OE Number : 18472Warranty : 2-year or unlimited-mile Motorcraft limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Motorcraft OE Replacement
Professional Series Heater Hose - Rubber, Direct Fit, Sold individually
Part Number: AC22453X
Guaranteed to Fit
$48.99
Vehicle Fitment
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Car, Without Engine Oil Cooler
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Car, Without Engine Oil Cooler
Product Details
Notes : Molded hoseMaterial : RubberProduct Fit : Direct FitReplaces OE Number : 88920424Warranty : 24-months or unlimited mile AC Delco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Professional Series
OE Solutions Series Heater Hose - Black/Coated, Steel, Direct Fit, Sold individually
Part Number: RB626571
Guaranteed to Fit
$13.99
Vehicle Fitment
  • 2003 Mercury Grand Marquis GS 8 Cyl 4.6L Pressed in Block Behind Water Pump
  • 2003 Mercury Grand Marquis LSE 8 Cyl 4.6L Pressed in Block Behind Water Pump
  • 2003 Mercury Grand Marquis LS 8 Cyl 4.6L Pressed in Block Behind Water Pump
Product Details
Notes : HVAC Heater Pipe Coolant Fitting; (2) Branch Quantity; 0.74 in. End 1 OD; 0.61 in. End 2 OD; Female End 1 Type; Male End 2 TypeMaterial : SteelColor Finish : Black/CoatedHose End A Diameter : 0.67 in.Hose End B Diameter : 0.43 in.Product Fit : Direct FitReplaces OE Number : F75Z8555AAWarranty : Lifetime Dorman limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : OE ReplacementSeries : OE Solutions SeriesInterchange Part Number : F75Z8555AA
Dayco Small I.D. Molded Series Heater Hose - Direct Fit, Sold individually
Part Number: DY88442
Guaranteed to Fit
$19.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis All Submodels All Engines Intake Manifold To Heater
Product Details
Length : 9 in.Product Fit : Direct FitQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Dayco Small I.D. Molded Series
OE Solutions Series Heater Hose - Direct Fit, Sold individually
Part Number: RB626202
Guaranteed to Fit
$31.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis All Submodels All Engines Heater Tube; Return Hose
Product Details
Length : 34 in.Product Fit : Direct FitReplaces OE Number : HHA133, 3W7Z18663BA, 9W7Z18663AWarranty : Lifetime Dorman limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Bisphenol A, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OE Solutions SeriesInterchange Part Number : HHA133, 3W7Z18663BA, 9W7Z18663A
Dayco Small I.D. Molded Series Heater Hose - Direct Fit, Sold individually
Part Number: DY87918
Guaranteed to Fit
$17.49
Vehicle Fitment
  • 2003 Mercury Grand Marquis All Submodels All Engines Heater To Pipe
Product Details
Length : 8 in.Product Fit : Direct FitWarranty : 1 year or 12,000-mile Dayco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Dayco Small I.D. Molded Series
Page 1 of 1 | Showing 1 - 12 of 12 results

Popular Products

Product Questions & Answers

Q:Diameter of hoses?
Richie
A:BEST ANSWERHi Richard, thank you for reaching out. The inside diameter of this hose is 0.75 inches. The length is 9 inches. If your vehicle information matches this product, you can use this link to continue ordering this part at a discounted price today: https://www.carparts.com/heater-hose/dayco/dy88442?can=CPAP3648_CSQA_20240116 I hope this helps. Happy shopping. Show less
Aldrin P.
 
1 Question, 1 AnswerView all Q&As >

Helpful Automotive Resources

Heating System Parts
Heating System PartsThe blower motor is a fan that forces air through either the heating or the cooling unit of the HVAC system. If you’re running the heater, the motor blows air over the heater core. The warmed air enters the passenger cabin, raising the temperature and fighting off the cold.
Main Components of Your Cooling System
Main Components of Your Cooling System4. HEAD GASKET /TIMING COVER GASKET: Seals the major parts of the engine. Prevents oil, anti-freeze and cylinder pressure from mixing together.
A Short Course on Cooling Systems
A Short Course on Cooling SystemsToday’s cooling system must maintain the engine at a constant temperature whether the outside air temperature is 110 degrees Fahrenheit or 10 below zero. If the engine temperature is too low, fuel economy will suffer and emissions will rise. If the temperature is allowed to get too hot for too
Heater Hose Replacement Tips To Consider
Heater Hose Replacement Tips To ConsiderLet your engine cool down before working on it. It’s best to do the work when the engine is completely cold, after it has been sitting for hours. Locate the Heater Hoses Heater hoses are always connected to the heater core. See diagram for the location. | Image Source: Richard McCuistian Remove the