HomeBelts and Cooling > Thermostat and HousingGates CO35043 Engine Coolant Thermostat Housing
Part #: CO35043

Gates CO35043 Engine Coolant Thermostat Housing

Coolant Outlet
⚙️ 16 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Coolant Outlet
🚗Fitment: Audi and Volkswagen, A3 Sportback e-tron, Golf, Golf SportWagen, Jetta, and Q3
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Gates Coolant Outlet Thermostat Housing CO35043

The Gates Coolant Outlet Engine Coolant Thermostat Housing CO35043 is designed for reliable cooling system performance in select Audi and Volkswagen models. Engineered with durable plastic and integrated seals, this thermostat housing supports efficient coolant flow and temperature regulation.

  • Constructed from high-quality plastic for corrosion resistance
  • Includes 2 integrated seals for secure coolant containment
  • Features 5 bolt holes for stable mounting
  • Dual outlet diameters: 0.77" and 1.25" outside, 0.6" and 1.05" inside
  • Compatible with Audi A3 Sportback e-tron and Volkswagen Golf, Golf SportWagen, Jetta, and Q3 models

Product Line Details: Gates Coolant Outlet

The Gates Coolant Outlet product line focuses on components that manage engine coolant flow and temperature control. This line includes thermostat housings designed to meet specific vehicle requirements, ensuring proper fit and function. The CO35043 thermostat housing is part of this line, offering a precise fit for select Audi and Volkswagen vehicles with integrated seals to maintain system integrity.

Technical Description and Specifications

The CO35043 thermostat housing is made from durable plastic, providing resistance to corrosion and heat exposure common in engine cooling systems. It features two outlet diameters—0.77 inches and 1.25 inches outside, with corresponding inside diameters of 0.6 inches and 1.05 inches—allowing compatibility with specific coolant hose sizes. The housing includes five bolt holes for secure attachment and comes with two integrated seals to prevent leaks. Note that this part is not an exact OE replacement but is engineered to meet or exceed performance requirements.

Compatible Vehicles and Applications

  • Designed for Audi A3 Sportback e-tron models requiring a reliable thermostat housing
  • Compatible with Volkswagen Golf and Golf SportWagen for effective coolant management
  • Fits Volkswagen Jetta and Q3 models needing a durable thermostat housing solution

Common Issues Addressed by This Thermostat Housing

  • Prevents coolant leaks caused by cracked or damaged thermostat housings
  • Maintains proper coolant flow to avoid engine overheating
  • Replaces worn or degraded plastic housings prone to failure
  • Ensures secure mounting with five bolt holes to reduce vibration-related damage
  • Helps maintain engine temperature regulation for optimal performance

Installation Notes and Tips

When installing the Gates CO35043 thermostat housing, ensure the mating surfaces are clean and free of old gasket material. The housing includes two integrated seals, so additional gaskets are not required. Tighten the five bolts evenly to the manufacturer's torque specifications to prevent leaks and ensure a proper seal. Verify hose connections match the specified outlet diameters for a secure fit.

Quality Assurance and Warranty

Gates manufactures the CO35043 thermostat housing to meet stringent quality standards for durability and performance. While this part is not an exact OE replacement, it is engineered to provide reliable service in compatible Audi and Volkswagen vehicles. Warranty information should be confirmed with the distributor or retailer at the time of purchase.

BrandGates
Part NumberCO35043
PositionCoolant Outlet
MaterialPlastic
Outlet Outside Diameter.77
Outlet Outside Diameter1.25
Bolt Hole Quantity5
TypeThermostat housing
Gasket Quantity0
Outlet Inside Diameter.6
Outlet Inside Diameter1.05
98412
9848No
ContentsThermostat housing, 2 integrated seals
OE ExactNo

This part fits 16 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2021VolkswagenGolf1.4LL4GASN/ASeal included; Coolant Outlet
2021VolkswagenJetta1.4LL4GASN/ASeal included; Coolant Outlet
2020VolkswagenGolf1.4LL4GASN/ASeal included; Coolant Outlet
2020VolkswagenJetta1.4LL4GASN/ASeal included; Coolant Outlet
2019VolkswagenGolf1.4LL4GASN/ASeal included; Coolant Outlet
2019VolkswagenGolf SportWagen1.4LL4GASN/ASeal included; Coolant Outlet
2019VolkswagenJetta1.4LL4GASN/ASeal included; Coolant Outlet
2018AudiA3 Sportback e-tron1.4LL4PLUG-IN HYBRID EV-GAS (PHEV)N/ASeal included; Coolant Outlet
2018VolkswagenJetta1.4LL4GASN/ASeal included; Coolant Outlet
2017AudiA3 Sportback e-tron1.4LL4PLUG-IN HYBRID EV-GAS (PHEV)N/ASeal included; Coolant Outlet
2017VolkswagenJetta1.4LL4GASN/ASeal included; Coolant Outlet
2016AudiA3 Sportback e-tron1.4LL4PLUG-IN HYBRID EV-GAS (PHEV)N/ASeal included; Coolant Outlet
2016AudiQ31.4LL4GASN/ASeal included; Coolant Outlet
2016VolkswagenJetta1.4LL4FULL HYBRID EV-GAS (FHEV)N/ASeal included; Coolant Outlet
2015VolkswagenJetta1.4LL4FULL HYBRID EV-GAS (FHEV)N/ASeal included; Coolant Outlet
2014VolkswagenJetta1.4LL4FULL HYBRID EV-GAS (FHEV)N/ASeal included; Coolant Outlet

* 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:

04E121116C

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.