Replaces the stretched drive chain in a Toyota/Lexus K114 CVT so the pulleys grip again after belt slip, shudder or a hard-launch flare.
When a Toyota K114 CVT flares on a hard launch, shudders at light throttle in the 25-40 mph range, or trips ratio and belt-clamping faults because the computer can no longer hold the ratio it commands, the drive element between the pulleys is often stretched or worn on its flanks. This is a remanufactured OE-pattern replacement for that element. It is usually sold as a CVT chain, but as the photos show it is the push-belt type Toyota uses: hundreds of hardened steel elements stacked on steel bands, which is exactly what the K114 runs.
Toyota's service manual describes the K114 as a fully electrohydraulically controlled, steel belt type continuously variable transaxle. The belt runs between a primary pulley on the input side and a secondary pulley on the output side. Each pulley is a pair of cone-shaped sheaves, and hydraulic pressure squeezes them together or lets them part, which changes the working diameter of each pulley and with it the ratio. An oil pressure sensor reports the clamping pressure on the belt so the control unit can hold it tight enough to transmit torque without slipping. When the belt elements and bands wear, the belt rides at the wrong radius and needs more clamping force than the hydraulic system can supply, so it slips under load and the sheave faces start to score.
Not every K114 slip is the belt. Low or aged fluid, a weak oil pump and a sticking pressure solenoid in the valve body can all reduce clamping pressure and mimic a worn belt. Check the fluid level and condition first, then follow our walkthroughs on CVT slipping under load and CVT failure patterns across brands. If the transmission is already apart, lay the old belt beside the new one: worn element flanks, cracked bands, or sheave faces with a polished step all confirm the belt has to be replaced, and scored sheaves mean the pulleys need attention too.
This belt is for the Aisin K114. The confirmed North American application is the 2018-2022 Toyota C-HR with the 2.0 L 3ZR-FAE engine. The listing title also names the Lexus NX and RAV4; in those lines the K114 belt CVT was used on the non-turbo, non-hybrid 2.0 L versions sold outside North America. The NX200t uses a conventional six-speed automatic, the NX300h and Harrier Hybrid use a hybrid transaxle with no belt, and US-market 2013-2018 RAV4s used a six-speed automatic, so none of those take this part. The newer Direct Shift CVT (K120) and the older K111 and K112 do not interchange either. Check the transmission code on the case or send us your year and VIN before ordering. More parts for belt-type transmissions are in our CVT parts collection.
No instructions are included and the part carries a 6-month limited warranty that excludes installation damage, so this is bench work for a technician who has been inside a belt CVT before. If the unit also has delayed engagement or harsh shifts, read CVT harsh or delayed shifts and consider the K114 valve body assembly at the same time.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a steel push belt: a stack of hardened steel elements held together by steel bands. It is commonly sold as a CVT chain, but the K114 is a steel belt type CVT and this is the matching part.
No. The NX300h is a hybrid with a different transaxle and no belt, and the NX200t uses a six-speed automatic. Only the non-turbo, non-hybrid 2.0 L NX sold in some markets outside North America used the K114.
The 2018-2022 Toyota C-HR with the 2.0 L 3ZR-FAE engine. Confirm the transmission code or send us your VIN before ordering.
Toyota Genuine CVT Fluid FE. Do not substitute a generic ATF or a multi-vehicle CVT fluid. The level is checked at the overflow plug at 35-45 C, as there is no dipstick.
Pulley bearings and seals, a full gasket and seal set, the filter, and any pulley with scored sheave faces. After reassembly, perform the Reset Memory and CVT oil pressure calibration Toyota specifies.
