Genuine STC4849 Heater Fan Control Cable Defender LHD
The Land Rover Defender is one of the most utilitarian vehicles ever built, and keeping its cabin livable in cold climates depends entirely on a properly functioning heater system. The STC4849 is the Genuine heater fan control and cable assembly designed specifically for left-hand drive (LHD) Defender models built up to VIN LA939975. This assembly is the complete cable-actuated unit that connects the heater fan speed selector switch to the blower motor, giving the driver precise control over interior airflow and temperature distribution.
The cable assembly is engineered to operate the heater blower motor speed control without electronic signal conversion. The mechanical cable runs from the control switch through the dashboard to the blower motor speed resistor, allowing the driver to select from multiple fan speeds with a simple rotary or slide motion depending on the Defender variant. Over time these cables can stretch, fray, or lose tension, causing erratic fan behavior or complete loss of control response. Replacing the assembly with a correct Genuine unit restores the precise, tactile feedback the system was designed to deliver.
Because this assembly is specific to left-hand drive configuration, the cable routing, switch mounting orientation, and harness connector position are all designed for LHD dashboards. Installing a right-hand drive unit in an LHD Rover will result in improper cable run, potential binding, and incorrect switch placement. Always confirm your vehicle is left-hand drive before ordering.
The STC4849 supersedes the earlier part numbers UTP1125 and BTR4434. If your Rover's service history or existing part shows one of those numbers, the STC4849 is the current Genuine replacement.
Fits:
Defender 90 (1984 to 1994) Multiple engine variants Petrol/Gas and Diesel
Defender 90 NAS (1994 to VIN RA939960) Multiple engine variants Petrol/Gas and Diesel
Defender 110 (1983 to 1994) Multiple engine variants Petrol/Gas and Diesel
Defender 130 (1983 to 1994) Multiple engine variants Petrol/Gas and Diesel
Part Number: STC4849
Free shipping to the lower 48!
Supersessions UTP1125, BTR4434
FAQ
Does this heater control assembly fit right-hand drive Defender models?
No. The STC4849 is manufactured specifically for left-hand drive (LHD) models only. The cable routing, switch orientation, and connector position are all designed around an LHD dashboard layout. If your Defender is a right-hand drive vehicle, you will need the corresponding RHD assembly, part number STC4848. Always confirm your vehicle's drive configuration before ordering.
What exactly is included in this assembly, and do I need any additional parts to complete the installation?
The STC4849 is a complete cable and switch assembly that includes the heater fan speed control switch and the attached cable that connects to the blower motor speed resistor. In most cases no additional hardware is required for a straightforward like-for-like swap. However, it is always worth inspecting the blower motor resistor and the blower motor itself for wear while the dashboard is accessible, as these components experience similar service life to the control cable.
Is the STC4849 a Genuine Land Rover part, and who actually manufactures it?
Yes, this is a Genuine Land Rover part. Whether purchased through a Land Rover authorized dealer or a trusted independent supplier, the part originates from the same UK factory.
