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Fitment notes and restrictions
Description
Control transfer-oil temperature during sustained high-load driving
HKS 27002-AT001 is an application-specific transfer oil cooler system for the AWD Toyota GR Corolla GZEA14H with the G16E-GTS engine. HKS developed the electric-pump system to limit transfer-oil temperature rise during continuous high-load use and help protect the transfer unit and oil.
Key Features
- Application-specific transfer oil cooler system for the GR Corolla
- Electric oil pump and dedicated pump controller
- Pipe-style cooler layout designed to limit obstruction of radiator and intercooler airflow
- Controller includes overcurrent and abnormal-temperature protection functions
- Compatible with Morizo Edition and the 2025 facelift according to HKS
- Exact HKS application is identified by manufacturer part number 27002-AT001
- Exact HKS application is identified by manufacturer part number 27002-AT001
Application details and restrictions
| Years / Scope | Make | Model / Component | Requirement |
|---|---|---|---|
| 2023-2025 | Toyota | GR Corolla | GZEA14H chassis, G16E-GTS engine, AWD; wiring and controller operation vary by transfer-protection-cancel-program availability |
HKS lists an estimated eight-hour professional installation. The transfer-protection cancel function is available on North American vehicles produced from September 2024; wiring and pump-controller operation differ on earlier vehicles. Required modifications include the reinforcement and intercooler air guide, plus the undercover on vehicles produced after March 2025. Confirm production date and current HKS instructions before installation.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 27002-AT001 |
| Product Type | Transfer oil cooler kit |
| Vehicle | Toyota GR Corolla |
| Chassis | GZEA14H |
| Engine | G16E-GTS |
| Drivetrain | AWD |
| Required Transfer Oil | 0.8L |
| Estimated Installation Time | 8 hours |
| Package Weight | 6.2kg |
| Package Size | 700 x 290 x 180mm |
| California Proposition 65 | Cancer and reproductive harm warning applies |
What's Included
- HKS 27002-AT001: HKS 27002-AT001 pipe-style transfer oil cooler assembly
- Electric oil pump, pump controller, and wiring harness
- Oil filter, brackets, hoses, fittings, and application-specific mounting hardware shown in the HKS parts list
- HKS installation manual
- Transfer oil and separately required tapes and sealants are not included
About HKS
HKS develops vehicle-specific cooling, engine, exhaust, electronics, and drivetrain systems for performance use. This transfer cooler is engineered around the GR Corolla's chassis, engine, AWD transfer unit, production date, and controller requirements.
Related Parts
- No related store product is linked because supporting components must be verified for the exact vehicle, engine, transmission, and current HKS configuration.
FAQ
What is the 27002-AT001?It is transfer oil cooler kit for the exact application and restrictions shown above.
Which vehicle is supported?HKS specifies the 2023-2025 Toyota GR Corolla with GZEA14H chassis, G16E-GTS engine, and AWD.
What problem does the kit address?It circulates transfer oil through a dedicated cooler to limit temperature rise during sustained high-load driving.
How much transfer oil is required?The HKS installation manual specifies 0.8 liter of transfer oil.
How long does installation take?HKS lists an estimated professional installation time of eight hours.
Are vehicle modifications required?Yes. HKS identifies reinforcement and intercooler-air-guide modifications, plus an undercover modification on vehicles produced after March 2025.
Does it fit the Morizo Edition?Yes. HKS lists compatibility with the Morizo Edition.
Does controller wiring vary by vehicle?Yes. Wiring and operation differ depending on whether the vehicle has the transfer-protection cancel program.
Installation Instructions
- Confirm the GZEA14H chassis, G16E-GTS engine, AWD configuration, production date, transfer-protection program status, and HKS 27002-AT001 package label.
- Have a qualified professional read the current HKS installation manual and Toyota service information completely before disassembly.
- Obtain 0.8 liter of the approved transfer oil, the separately required tapes and sealants, an electric crimping tool, a rivet-nut tool, and all specified safety equipment.
- Remove the required underbody and front components, then modify the reinforcement, intercooler air guide, and applicable undercover only as shown by HKS.
- Install the cooler pipe, electric pump, filter, brackets, hoses, fittings, controller, and harness in the exact positions and routing shown in the manual.
- Wire and configure the pump controller according to the vehicle's production date and transfer-protection-cancel-program status.
- Fill and bleed the transfer-oil circuit using the HKS procedure, inspect every connection for leaks, and confirm pump and controller operation before reassembly.
- Reinstall all vehicle components, verify clearance and fastener torque, and follow HKS operating guidance during the initial heat cycle and subsequent inspection.
California Proposition 65 Warning: Cancer and reproductive harm - www.P65Warnings.ca.gov.
