2003-2007 Infiniti G35 Coupe RWD Factory RE5R05A Automatic Transmission Assembly Identification

Only explicit checked relationships are asserted: torque converter 31100-90X07 -> 31100-90X13 and converter housing 31301-90X01 -> 31301-90X10. The 31020 and 31000 identities are production/application branches, not one universal supersession chain; catalog multi-supersession wording was not converted into an unsupported arrow. Rear extensions 31330-90X03, 31330-90X05 and 31330-97X0A remain distinct interfaces. RE5R05A is a family label and shared blank 31020-92X2B is an existing Z33-0055 reference, not proof that a 350Z, Sedan, FX or unidentified unit is plug-and-play in this Coupe.

Begin with both VINs, door-label build dates and clear photographs of the original and donor complete transmission tag/serial and Unit ID, case, converter housing, rear extension and output flange, pan, electrical connectors and cooler fittings. Match the checked production branch, VQ35DE calibration/control equipment, input and output interfaces, converter and flexplate pilot, control valve or valve body, TCM state, harness and sensors, cooler fittings/lines, fill tube, shifter/cable, mount/brackets and propeller-shaft flange. Require a written, photo-backed inventory; converter, valve body, TCM, harness, sensors, lines, shifter, mount, brackets and hardware are absent unless stated. Ask for mileage, donor-running evidence, codes, fluid color/odor, pan or filter debris, leak/overheat history, core, warranty, returns and freight dimensions. Reject burnt or contaminated fluid, metallic or friction debris, cracked or welded cases, damaged splines/flanges/threads, broken connectors, cut wiring, open ports, water/fire/flood exposure, unknown overheating and undocumented modification. Drain lawfully, cap every opening and secure upright on a transmission-rated pallet or crate with documented liftgate or terminal terms. Require qualified diagnosis and installation and current Infiniti service information for fluid, cooler flush or replacement, Unit ID/EEPROM programming and relearn; no bypass or unsupported swap instruction is provided.

A remanufactured RE5R05A is acceptable only when the supplier writes the exact G35 Coupe RWD year/build or VIN application, complete tag/calibration match, converter and valve-body/TCM state, included upgrades, test procedure, core rule, warranty/labor coverage, freight and return terms. Roadmaster RMP173AG was the only checked reman path whose title explicitly said 3.5L RWD G35 Coupe and included a torque converter; its year/calibration range still requires confirmation. AutoZone 400-05058T stated converter included and cooler, fluid and flexplate excluded, but its direct page did not establish exact Coupe fit. Shared RE5R05A family, universal swap and bypass claims remain outside this guide.

US/LHD 2003-2007 G35 Coupe RWD VQ35DE RE5R05A five-speed automatic only. Match both VINs/builds and the complete tag/Unit ID, production branch, case/housing/rear extension, converter, control equipment, connectors, cooler and output interfaces. RE5R05A or 31020-92X2B alone is not interchange proof. Written contents, condition, core, freight, cooler service and authorized programming/relearn control.

Supersede reviewed 18 unique research sources for this guide. 5 also appear above as a seller or official action and are not repeated here; 13 additional citations follow.

Research last verified 2026-08-07.

1. Infiniti Parts Deal — auto transmission transaxle fittingOpen source
2. Infiniti Parts Deal — auto transmission transaxle fittingOpen source
3. Infiniti Parts Deal — auto transmission transaxle fittingOpen source
4. Infiniti Parts Deal — auto transmission transaxle fittingOpen source
5. Infiniti Parts Deal — auto transmission transaxle fittingOpen source
6. Infiniti Parts Deal — torque converter housing caseOpen source
7. Infiniti Parts Deal — torque converter housing caseOpen source
8. Nicoclub — service manualOpen source
9. Nicoclub — service manualOpen source
10. Nicoclub — service manualOpen source
11. Nicoclub — service manualOpen source
12. Cdn z1motorsports — Z1350Z370ZG35G37Q50Q60AutomaticTransmissionModelsOpen source
13. D2q1ebiag300ih cloudfront — RE5R05A Solenoid IDOpen source