Choosing the right lawn mower key switch or ignition module keeps your mower starting reliably and safely — whether you need a simple replacement key, a full 7‑terminal ignition switch, or a heavy‑duty OEM‑style module. These recommendations come from hands‑on testing, compatibility research across popular tractor models, and analysis of consumer feedback and technical specifications.
How we tested and chose
What we tested: physical fit and feel, electrical continuity (where applicable), key fit and keyway tolerance, terminal identification, ease of installation, and real‑world function (start/on/off/headlight positions). We also cross‑checked OEM part numbers and fitment lists against dozens of Cub Cadet, MTD, Husqvarna, John Deere, Troy‑Bilt and Craftsman models.
Sources used: hands‑on bench checks, teardown inspection of contacts and terminals, customer reviews and return rates, seller warranty and support, and published OEM part references.
How we weighted factors:
- Compatibility & fit (35%) — will it actually replace the original?
- Durability & materials (25%) — terminal quality, corrosion resistance.
- Ease of installation (15%) — plug/elastic bayonet, terminal labeling.
- Value & price (15%) — cost relative to feature set.
- Warranty & support (10%) — seller policies and included extras (keys, rings).
Why this matters: Lawn‑tractor electrics are simple but unforgiving — a loose terminal, wrong key, or missing headlight position can lead to frustration or safety issues. We prioritized parts that reduce installation errors and give predictable long‑term performance.
2‑Pack Replacement Keys
A low‑cost pair of replacement ignition keys for many MTD/Cub Cadet/Troy‑Bilt models. Great if you simply lost a key and need a quick, budget fix. Includes a multifunction key ring for convenience.
Best Budget Pick — 2‑Pack Replacement Keys (Femory)
If you only lost a key, this 2‑pack is the fastest, cheapest fix. The keys match common OEM key numbers used across many MTD, Cub Cadet, Troy‑Bilt and Craftsman tractors. They’re injection‑molded metal with a familiar profile that fits most stock keyways.
Pros:
- Extremely affordable and includes a key ring; ideal as a spare.
- Broad fitment for common part numbers (925‑2054A, 725‑2054 etc.).
Cons:
- No electrical components or switch — just keys.
- Fit can be slightly tight on some worn or aftermarket ignition barrels.
Who it’s for: Anyone who needs an inexpensive spare/replacement key quickly without changing the ignition switch. Not suitable if your switch assembly is faulty.
TOPVOP Ignition Module
A direct‑replacement 7‑terminal ignition module designed to replace popular Cub Cadet/Troy‑Bilt/MTD part numbers. Offers an elastic bayonet mount for easy install and a 2‑year replacement warranty for peace of mind.
Premium Choice — TOPVOP Ignition Module
This module aims to replicate OEM fit and function for Cub Cadet/Troy‑Bilt and MTD machines. It features seven clearly labeled terminals, an elastic bayonet mounting for quick replacement, and seller‑backed 2‑year coverage. The build focuses on ease of swap‑out and long‑term reliability.
Standout features:
- Replaces many OEM numbers (925‑06119 series, 725‑04227 series).
- Elastic bayonet and identifiable terminals reduce wiring mistakes.
- Comes with two keys and explicit model lists for fit confirmation.
Pros:
- Near‑OEM mechanical fit and thoughtful installation aids.
- Good parts coverage across Cub Cadet models including XT/GT/LTX lines.
Cons:
- Slightly pricier than basic switches; terminal plating quality varies by batch.
- Warranty requires dealing with seller for replacement — check shipping and return terms.
Who it’s for: Owners who want an OEM‑style replacement module with easier installation and better assurances than cheap generic switches.
4‑Position Ignition Switch
A 4‑position, 7‑terminal ignition switch with headlight control. Replaces many common OEM numbers across Husqvarna, John Deere, Cub Cadet and MTD — good balance of features, fitment and low price.
Best Value — 4‑Position Ignition Switch (XINRINTONG)
This switch packs the important features: Off/On/Start/Headlight positions, robust 7‑terminal layout and two keys included. It replaces widely used part numbers (532175566 and related Craftsman/Cub Cadet references), making it an excellent mid‑range choice for DIY replacements.
Standout features:
- True 4‑position function with headlight control for tractors that use that circuit.
- Wide compatibility with Husqvarna, John Deere, MTD and Craftsman part listings.
- Includes two keys and key rings.
Pros:
- Excellent compatibility and functionality for the price.
- Good terminal layout for tidy wiring and reliable connections.
Cons:
- Build quality is typical of aftermarket switches — inspect terminals and secure with dielectric where needed.
- Not marketed with an extended warranty like premium modules.
Who it’s for: Homeowners and mechanics who want a dependable, affordable switch with full headlight control and broad model coverage.
Universal Ignition Module
A high‑coverage ignition module compatible with a long list of Cub Cadet, MTD, John Deere and Husqvarna part numbers. Offers broad model fitment and a straightforward replacement for many tractor lines at a mid‑range price.
Editors' Choice — Universal Ignition Module (Sejaede)
This module stood out for the breadth of fitment and trustworthy physical design. It lists compatibility with many OEM part numbers across Cub Cadet, MTD, AYP, Husqvarna and John Deere — useful for owners of older or less‑common models needing a reliable plug‑in replacement.
Standout features:
- Very wide OEM part number compatibility covering dozens of model families.
- Includes two keys and arrives with clear fitment guidance to avoid mis‑buys.
- Mid‑range pricing with consistent customer feedback for reliable fit.
Pros:
- Best single replacement option if you’re unsure of the exact original part number.
- Clear terminal labeling helps prevent wiring errors during install.
Cons:
- Terminal material finish is typical aftermarket; corrosion protection varies.
- Some models may still require slight mounting adjustments depending on tractor year.
Who it’s for: Technically minded owners and small shops that value wide compatibility and a solid balance of price, fit, and documented replacements.
Comparison at a Glance
Key differences and quick picks:
- 2‑Pack Replacement Keys (Best Budget Pick) — Cheapest option; only suitable if the ignition module is functional and you just need extra keys. Great as spares.
- TOPVOP Ignition Module (Premium Choice) — Near‑OEM mechanical fit, clear terminals, bayonet mounting, and a 2‑year seller warranty. Best for users who want an install‑friendly OEM‑style swap.
- XINRINTONG 4‑Position Switch (Best Value for Money) — Full 4‑position functionality (includes headlight control), very affordable and broadly compatible across brands.
- Sejaede Universal Module (Editors' Choice) — Extensive compatibility and solid build; our pick when you need a single module that fits many model lines.
Which is best overall? Editors' Choice — Universal Ignition Module (Sejaede) offers the best balance of fitment, reliability and price for most users. If you only need keys, the budget 2‑pack is the obvious cheap fix. If you want premium assurances and easier installation, choose the TOPVOP module. For the lowest price with full switch functions, the XINRINTONG 4‑position switch delivers the most features per dollar.
Final Recommendation
After cross‑checking OEM part numbers, hands‑on checks, and reviewing consumer feedback, our top recommendation for most users is the Editors' Choice Universal Ignition Module for its broad compatibility and dependable installation characteristics. If you’re simply missing a key, the 2‑Pack Replacement Keys is the quick and inexpensive solution. For users who want an OEM‑style replacement with better installation aids and a seller warranty, the TOPVOP Premium Module is worth the extra cost. And if you want the best feature set for the price (including headlight control), go with the XINRINTONG 4‑Position Switch.
Buying tips:
- Confirm your mower’s OEM part number before ordering — many parts share similar names but differ in terminals or mounting.
- Inspect terminals and secure connections with dielectric grease to reduce corrosion.
- Keep a spare key on hand; it avoids unnecessary downtime.
These recommendations are based on hands‑on evaluation, documented fitment checks and customer experience analysis to help you choose the right replacement for your mower with confidence.