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GatesPart #: 23999
Gates 23999 HVAC Heater Hose - Heater - Left Side or Heater To Pipe
⚙️ 18 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$50.40Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
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*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Molded Coolant Hose, Heater To Pipe and Heater - Left Side
🚗Fitment: Ford and Lincoln, F-150, F-350, and Mark LT
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
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Gates 23999 HVAC Heater Hose - Heater - Left Side or Heater To Pipe
| Brand | Gates |
| Part Number | 23999 |
| Position | Molded Coolant Hose, Heater To Pipe and Heater - Left Side |
| Material | Epdm, plastic, steel |
| End 1 Inside Diameter | .63 |
| End 1 Inside Diameter | 16 |
| End 2 Inside Diameter | .63 |
| End 2 Inside Diameter | 16 |
| Contains Spring | No |
| Centerline Length | 23.16 |
| Centerline Length | 588 |
| Branch Quantity | 0 |
| 9839 | Yes |
| 9845 | 1 |
| Modular Components | Female quick connector |
| Modular Hose | Yes |
| Molded | Yes |
| Number of Quick Connect Fittings | 1 |
This part fits 18 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2008 | Ford | F-150 | 4.2L | V6 | GAS | Heater To Pipe | Molded Coolant Hose |
| 2008 | Ford | F-150 | 5.4L | V8 | FLEX | Heater - Left Side | Molded Coolant Hose |
| 2008 | Ford | F-150 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2008 | Ford | F-350 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2008 | Lincoln | Mark LT | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2007 | Ford | F-150 | 4.2L | V6 | GAS | Heater To Pipe | Molded Coolant Hose |
| 2007 | Ford | F-150 | 5.4L | V8 | FLEX | Heater - Left Side | Molded Coolant Hose |
| 2007 | Ford | F-150 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2007 | Ford | F-350 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2007 | Lincoln | Mark LT | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2006 | Ford | F-150 | 4.2L | V6 | GAS | Heater To Pipe | Molded Coolant Hose |
| 2006 | Ford | F-150 | 5.4L | V8 | FLEX | Heater - Left Side | Molded Coolant Hose |
| 2006 | Ford | F-150 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2006 | Ford | F-350 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2006 | Lincoln | Mark LT | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2005 | Ford | F-150 | 4.2L | V6 | GAS | Heater To Pipe | Molded Coolant Hose |
| 2005 | Ford | F-150 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
| 2005 | Ford | F-350 | 5.4L | V8 | GAS | Heater - Left Side | Molded Coolant Hose |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
1665824709L4L34 18K579 BB4L34 18K579 BC4L34 18K579 BD4L3Z 18472 BA5L3Z 18472 CB5L3Z 18472 E5L3Z 18472 HB
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.