ACDelco Engine Coolant Temperature Sensor G1852 Gold - Direct-Fit 0.840" Thread, OEM-Calibrated

ACDelco Gold G1852 (12334869) is a direct-fit engine coolant temperature sensor designed to restore accurate temperature readings for your vehicle’s cooling, HVAC and engine management systems.

This ACDelco Professional replacement sender is engineered as a premium aftermarket part to match original-equipment specifications for fit, form and function. It communicates coolant temperature to the vehicle’s computer and gauges, supporting systems such as ignition timing, fuel delivery, HVAC climate control and cooling fan operation. Built to ACDelco Gold standards, the G1852 is intended to provide reliable performance across normal operating temperatures.

How does this sensor affect engine performance and vehicle systems?

The coolant temperature sensor supplies real-time temperature data to the engine control unit and other modules, which use those inputs to adjust fuel delivery, ignition timing and fan activation. A correct reading helps the vehicle run efficiently and keeps accessory systems like HVAC responsive. Replacing a failing sender prevents erratic idle, poor fuel economy and incorrect gauge readings.

• Direct-fit design for easy replacement without modification
• Operates across a useful range: low ~100°F to high ~220°F
• Supports ignition, fuel management, cooling fan, and HVAC functions
• Thread diameter: 0.840 inch for compatible ports

What are the key specifications I should check before ordering?

Confirm thread size, connector style and temperature range match your vehicle’s original sensor. The G1852 has a 0.840-inch thread diameter and is calibrated to report temperatures roughly between 100°F and 220°F. Verifying these specs ensures correct fitment and signal compatibility with your vehicle’s wiring and control modules.

• Thread diameter: 0.840 inch
• Temperature reporting range: approximately 100°F to 220°F
• Engine systems supported: cooling, HVAC, ignition, fuel management
• Premium aftermarket construction to meet OEM expectations

How easy is it to install the ACDelco G1852 sensor?

Installation is typically straightforward: drain coolant as needed, unplug the electrical connector, remove the old sender, and thread in the ACDelco Gold replacement. Use proper torque and sealing practices to avoid leaks. If you’re comfortable with basic automotive maintenance, this is a common DIY job; otherwise, a technician can swap it quickly.

• Unplug electrical connector before removal
• Use correct thread sealing method and torque spec
• Refill and bleed cooling system after installation
• Professional installation available if you prefer not to DIY

How durable and reliable is this ACDelco Professional sender?

ACDelco’s Gold line is built for dependable aftermarket performance and designed to meet or exceed expectations for long-term fit and function. The component materials and manufacturing aim to resist typical engine-bay conditions like vibration and temperature cycles. Routine inspection and correct installation help ensure consistent signal output over the part’s service life.

• Premium aftermarket quality for dependable operation
• Manufactured to meet expected fit, form, and function
• Designed to handle normal engine bay temperature cycles
• Reduces risk of incorrect temperature readings when installed correctly

Who is this for: The ACDelco Gold G1852 (12334869) sensor is ideal for vehicle owners and mechanics seeking a high-quality replacement for a failing or out-of-spec coolant temperature sender. It suits those who need a direct-fit, OEM-style part that supports engine management, cooling fan control and HVAC responsiveness. Choose this sensor when you want a dependable aftermarket option that matches original specifications and makes a straightforward replacement.