Genuine Mazda 4th Gear – 6-Speed Manual Transmission • P601-17-211A

Genuine Mazda P601-17-211A 4th Gear – 6-Speed Manual Transmission

Replacement Genuine Mazda 4th gear for Mazda MX-5 Mk3 / Mk3.5 / Mk3.75 (NC) 2.0L 6-speed manual and selected Mazda RX-8 6-speed manual applications listed in the compatibility table.

This is an internal manual gearbox component used within the 6-speed transmission gearset. The 4th gear works with the main shaft, countershaft, synchronizer hub, synchro ring and related bearings to provide the correct gear ratio and smooth power transfer through the gearbox.

There is typically one 4th gear fitted per gearbox. It is located inside the manual transmission and requires gearbox removal and strip-down to replace.

This part is commonly replaced during gearbox rebuilds when the original gear is chipped, worn, noisy, damaged from synchro failure, affected by oil starvation, or found to have damaged engagement teeth during inspection. Symptoms may include noise in 4th gear, poor gear engagement, baulking, or gear damage discovered during a manual transmission rebuild.

• Part type: 4th gear / manual transmission gear / top gear
• Primary use: 4th gear within the 6-speed manual transmission
• Location: Inside manual gearbox, geartrain assembly
• Quantity per gearbox: 1
• Brand: Genuine Mazda
• Part No.: P601-17-211A
• Also referenced as: P60117211A
• Supersedes / cross-references: P601-17-211 / P60117211
• Designed for Mazda 6-speed manual gearbox applications listed in the compatibility table
• Not for 5-speed manual or automatic transmission applications

Fitment advice: Designed for the Mazda 6-speed manual gearbox applications listed in the compatibility table. This is an internal gearbox gear, so for gearbox-swapped, previously rebuilt or competition-use vehicles, match the 6-speed gearbox type and the gear being replaced before final assembly.

Other items to consider: When changing this part, you may also want to consider purchasing related gearbox rebuild items such as synchronizer rings, 3rd/4th hub and sleeve components, gear bearings, retaining rings, selector fork components, input/output shaft seals, gearbox gaskets or sealant, fresh Mazda-approved gearbox oil and any damaged or worn hardware found during inspection.

Useful tools / consumables: Transmission jack, socket set, torque wrench, circlip pliers, bearing pullers, press tools, clean assembly bench, gearbox oil, brake cleaner, lint-free cloths, marking tools and the Mazda workshop manual for gearbox strip-down and rebuild procedure.

Difficulty guide: DIY Difficulty: Advanced. Replacing 4th gear requires gearbox removal and internal transmission disassembly. Correct inspection, bearing installation, gear orientation, shaft assembly and clearance checks are essential for gearbox reliability and smooth operation.

Why Genuine Mazda? Genuine Mazda gearbox components are manufactured to the original transmission specification for correct tooth profile, hardening, surface finish, bearing fit and synchronizer compatibility. Using the correct Genuine Mazda gear helps maintain shift quality, strength, noise control and long-term gearbox durability.

Why buy from Mazspec? Mazspec specialises in Mazda and MX-5 parts, including gearbox, driveline and service components. We source genuine Mazda parts through trusted OE channels and can help with related gearbox rebuild items, oils, seals and practical parts advice for the job.

What’s in the box: One Genuine Mazda 4th gear for the 6-speed manual gearbox.

Installation notes: Inspect the mating gear, synchronizer ring, hub/sleeve, bearings, selector fork and related gearbox components during rebuild. Replace any worn or damaged associated parts before final assembly. Refill with the correct gearbox oil and check gear selection operation before returning the vehicle to service.