Genuine OEM INFINITI Engine Parts — Sensors, Harnesses and Components
INFINITI of Akron stocks genuine OEM INFINITI engine parts for every powertrain in the INFINITI lineup — from the 3.5L VQ35DE in the QX60 to the 3.7L VQ37VHR in the G37, the 3.0T twin-turbo VR30DDTT in the Q50, and the 2.0T VC-Turbo KR20DDET in the QX50. Every engine component carries the original Nissan factory part number, is sourced directly from the Nissan North America distribution network, and includes the full manufacturer warranty.
Why Engine Components Require OEM on Modern INFINITIs
Modern INFINITI engine management systems are calibrated at the factory to the specific response characteristics of OEM sensors. The Q50 Direct Adaptive Steering, the QX50 variable compression engine management, and the advanced traction systems across all INFINITI models communicate with engine sensors in real time. An aftermarket oxygen sensor or mass air flow sensor with slightly different response curves provides data the ECU may misinterpret — affecting fuel trim, shift calibration, stability control response, and on the QX50, compression ratio management itself.
These calibration issues can be difficult to diagnose and may not immediately trigger a check engine light. They manifest as subtle performance degradation, increased fuel consumption, or inconsistent transmission behavior that gets misdiagnosed as other problems. Genuine OEM sensors eliminate this diagnostic uncertainty entirely.
Engine Components by Powertrain
- VQ35DE (QX60 2013–2024) — Mass air flow sensors, upstream and downstream oxygen sensors, spark plugs with correct iridium specification, ignition coils, engine wiring harnesses, crankshaft and camshaft position sensors, coolant temperature sensors, and timing chain components.
- VQ37VHR (G37 2008–2013, Q70) — Bank 1 and bank 2 oxygen sensors, iridium spark plugs with high-rev specific heat range, mass air flow sensors, VVEL system components, serpentine belt and accessory drive components, and water pump.
- VR30DDTT (Q50 3.0T 2016–present) — Engine-specific sensors, turbocharger assemblies and components, intercooler pipes and boots, boost pressure sensors, wastegate actuators, charge air cooler components, and engine management harnesses.
- KR20DDET VC-Turbo (QX50 2019–present) — Variable compression-specific sensors requiring OEM calibration tolerances, VC mechanism actuator components, turbocharger assemblies, intercooler components, and boost management sensors. No aftermarket equivalent exists for most VC-Turbo-specific components.
Engine Control Module Replacement
The Q50 drive-by-wire Direct Adaptive Steering system requires genuine OEM ECM replacement — the module is pre-programmed to INFINITI specifications and third-party modules are not compatible with DAS calibration. All INFINITI ECMs should be sourced as genuine OEM to maintain factory calibration for fuel trim, transmission shift logic, and emissions compliance. Aftermarket or refurbished ECMs may require dealer programming that can introduce compatibility issues with INFINITI-specific systems.
Frequently Asked Questions
Why do INFINITI engine sensors need to be OEM?
Modern INFINITI engine management systems are calibrated to the exact response curves of OEM sensors at the factory. Aftermarket sensors with different electrical characteristics provide subtly incorrect data affecting fuel trim, stability control, transmission shifting, and on the QX50, variable compression ratio management. These issues can be difficult to diagnose and may not immediately trigger a check engine light, manifesting as subtle performance degradation that gets misdiagnosed as other problems.
Are INFINITI engine parts specific to each engine type?
Yes. Engine-specific components including oxygen sensors, mass air flow sensors, ECMs, turbocharger parts, and ignition components are unique to each engine family. A part for a 3.7L VQ37VHR will not fit or function correctly in a 3.0T VR30DDTT. Always confirm your engine type or enter your VIN when ordering any engine component.
What spark plugs does the INFINITI QX60 use?
The INFINITI QX60's 3.5L VQ35DE engine uses iridium spark plugs with a specific heat range and gap specification. The recommended replacement interval is 60,000 miles under normal driving conditions. Genuine OEM iridium plugs maintain the combustion characteristics the VQ35DE's engine management was calibrated around. Non-OEM plugs with incorrect heat range or gap specifications can affect idle quality and fuel trim.
Does the INFINITI Q50 ECM need to be programmed after replacement?
Yes. The Q50 ECM requires programming to the vehicle's specific VIN and configuration, particularly on models equipped with Direct Adaptive Steering where the ECM interfaces with the steer-by-wire system. Genuine OEM ECMs sourced from an authorized dealer like INFINITI of Akron are supplied blank and must be programmed by an authorized INFINITI dealer or technician with the appropriate diagnostic equipment.
