The Tesla Model X uses a dedicated battery coolant chiller in the A/C circuit to control high-voltage battery temperature. This plate-style heat exchanger with integrated expansion valve (EXV) sits between the R134a refrigerant loop and the glycol coolant loop, allowing the A/C system to actively cool the battery, drive units,
and power electronics during Supercharging, towing, and hot-weather operation.
The unit offered here is the correct Battery Cooler Heat Exchanger / Chiller EXV assembly for Model X 2016–2020, Tesla P/N 1037764-00-C. It is a direct bolt-in replacement for the original chiller used on S/X shared thermal platforms and is ideal when the factory unit is leaking, internally restricted, or contaminated following
an A/C compressor or desiccant bag failure.
| Spec | Detail |
| Tesla Part Number | 1037764-00-C — Battery cooler heat exchanger / chiller EXV assembly (without coolant valve) |
| Application | Tesla Model X 2016–2020; also used on late Model S with shared S/X thermal platform |
| Function | Plate heat exchanger + expansion valve that cools the HV battery coolant loop using the A/C refrigerant circuit |
| Refrigerant | R134a (factory Tesla S/X refrigerant for these build years) |
| Coolant | Ethylene-glycol EV coolant (Tesla S/X battery and drive-unit loop) |
| Typical Failure Modes | External corrosion and leaks, internal restriction, refrigerant–coolant cross-leak, contamination from A/C compressor failure |
| Service Recommendation | Replace chiller/EXV as an assembly; inspect and flush lines, replace receiver/drier, and verify 3-way valves and pumps operate correctly |
| Warranty | Contact Gruber for available warranty and core-exchange options on used, reman, or new units |
