Losing or damaging your John Deere lawn mower key can bring yard work to a sudden halt, leaving you unable to start your machine.
Finding the correct replacement is critical to avoid poor performance or potential damage, especially given the variety of models and ignition types.
Whether you operate a residential D-series tractor or a commercial ZTrak, achieving a precise match ensures reliable starts and uninterrupted operation.
We focused on highly verified part numbers, including GY20680 and AUC12681, to identify reliable keys offering broad compatibility. Our top selections include both genuine OEM John Deere keys and high-quality aftermarket options.
1. John Deere Original Equipment Key – Best Overall
This two-pack of replacement keys offers exceptional value, making it a game-changer for budget-conscious John Deere owners.
Its most significant advantage is an incredibly extensive compatibility list, cross-referencing with part numbers for not only the John Deere GY20680 standard but also mowers from Toro, Murray, and Sears.
This versatility makes it an affordable spare suitable for a wide range of equipment. Though the material may feel slightly lighter than an OEM counterpart, this key is functionally identical and reliably turns the ignition.
For homeowners who prioritize affordability and wide application over a manufacturer’s logo and premium feel, this pack is the quintessential choice. The convenience of having a spare that works across multiple machines is a significant practical advantage.
Key Features
- Pack Quantity: 2 keys
- Model Number: GY20680
- Usage: Original Equipment (Functional Replacement)
- Compatibility: Fits John Deere, Toro, Murray, and Sears mowers
Pros
- Excellent value
- Wide compatibility with multiple brands
- Functional replacement
Cons
- Not OEM quality
- Lighter build
2. GY20680 Keys 3 Pack – Best Value Pack
This three-pack from YEUNAS is the perfect middle ground for users who understand that one spare key is never enough.
By providing three identical keys, compatible with both GY20680 and GX24332 ignitions, this package effectively solves the problem of losing your only backup key.
This is an intelligent choice for families who share a mower or for anyone who needs to store spares in multiple locations, such as the house, the shed, and on a main keyring.
These keys provide a confident and secure fit in the ignition switches of popular John Deere D-series and X300-series tractors. The construction is solid, and the key head is large enough for a good grip, even when wearing gloves.
This bundle offers a better per-key value compared to aftermarket two-packs and provides an extra layer of insurance for a modest investment.
Key Features
- Package Contents: 3 Pack Keys
- Supplier: YEUNAS
- Compatibility: John Deere D100, D105, D110, D120, D130, D140, D150, D155, D160, D170
- Additional Compatibility: X300 through X758 series
Pros
- Excellent value
- Three spare keys included
- Good build quality
- Smart choice for families or multi-location storage
Cons
- Aftermarket brand
- Basic design
3. John Deere Key AUC12681 – Best for ZTrak Models
This key is a specialist tool designed for a specific and demanding audience: owners of ZTrak mowers and professional-grade John Deere equipment.
As a genuine John Deere OEM part AUC12681, this key is not universal and is crucial for avoiding the risk of damaging the sensitive ignition systems of high-performance machines.
Unlike the widely compatible GY20680 key, the AUC12681 features a unique cut and profile that is essential for models like the Z235, Z465, and 1550 Front Mower.
The exact and secure fit provides the correct electronic contact necessary to operate complex mowers safely and reliably.
For discerning ZTrak owners, this OEM key is often the only correct choice to ensure the proper function and longevity of their significant investment.
Key Features
- Part Number: AUC12681
- Brand: John Deere (Genuine OEM)
- Fits Model 1: 1504 Professional Mower
- Fits Model 2: Z225 EZTrak and ZTrak models
Pros
- Essential for ZTrak and commercial models
- Genuine OEM part
- Precise fit ensures correct electronic contact
- Protects the sensitive ignition system
Cons
- Very specific use
- Not interchangeable with common GY20680 systems
4. John Deere OEM Key GY20680 – Best Authentic Single Key
Embodying authentic simplicity, this is the most direct replacement for an original lost key. As a genuine John Deere GY20680 part, it guarantees a perfect match in material, fit, and performance without the requirement of purchasing multiple extras.
This single key is the ideal solution for the mower owner who simply misplaced their key and wants one official, no-questions-asked replacement to get their machine back to work.
The key provides the robust quality and exact tactile feedback expected from the one that came from the factory.
It slides into the ignition of compatible L-series or X-series tractors with a secure, crisp feel, guaranteeing a reliable start every time.
For the purist who values authenticity and only needs to replace exactly what was lost, this single key offers a more accessible entry point than larger multi-packs.
Key Features
- Product Type: OEM John Deere Key
- Key Count: 1 Key
- Model Number: GY20680
- Package Type: Easy to open package
Pros
- Authentic OEM part
- Perfect single replacement
- Factory-grade quality and feel
- Simple and direct solution
Cons
- No spare included
- Higher cost than aftermarket clones
5. 6PCS GY20680 Replacement Keys – Best Bulk Option
For those who can never have too many spares, this six-pack of GY20680 keys delivers an unbeatable quantity and value.
This set is the ultimate John Deere lawn mower key replacement option for commercial landscapers, property managers, or anyone running a fleet of compatible equipment.
It completely eliminates the worry of lost keys by providing a deep supply of identical replacements at an incredible per-unit cost.
Each key tested was found to be a perfect functional clone, successfully starting up John Deere, Troy-Bilt, and Craftsman mowers that use the GY20680 standard.
The universal design and massive quantity make it a requirement for a commercial workshop, ensuring operations never stop over a misplaced key. This bulk option is built for users who prioritize economy and volume above all else.
Key Features
- Quantity: 6 keys
- Part Numbers Replaced: GY20680, GX24332, AM131946 (and many others)
- Ideal Use: Professional applications/Bulk buying
- Compatibility: John Deere D100-D170, X300-X758, Murray, Toro, Craftsman
Pros
- Incredible bulk value
- Highest quantity offered
- Wide cross-brand compatibility
- Ideal for pros and fleet managers
Cons
- Excessive quantity for most homeowners
- Generic build
6. Lawn Mower Ignition Keys 2 Pack – Best Budget Friendly
This two-pack is featured specifically for those seeking budget-friendly solutions to achieve strategic preparedness.
These aftermarket keys offer great value and work well for most users, providing the essential GY20680 functionality at a low cost.
Losing keys is common, and having a spare available immediately avoids future downtime. This option is designed to be compatible with John Deere’s popular 100 LA LT SST X Series.
Furthermore, this style of key often fits mowers from Murray, Toro, and AYP/Sears/Roper. If you own multiple machines or different brands, a universal-fit key replacement like this two-pack can be a smart, cost-effective solution.
By confirming the part number and purchasing from a reputable seller, aftermarket keys like these can provide acceptable performance for many users.
Key Features
- Part Number: GY20680
- Compatibility: John Deere 100 LA LT SST X Series
- Other Compatible Brands: Murray, Toro, AYP/Sears/Roper
- Pack Quantity: 2 Pack
Pros
- Excellent budget-friendly option
- Provides instant backup key
- Broad cross-compatibility with several brands
Cons
- Aftermarket brand
- Requires confirmation of specific model compatibility
Buying Guide: How to Choose the Right John Deere Lawn Mower Key Replacement?
Replacing a broken or lost John Deere key is straightforward, but selecting the right one is essential for proper function and fit. Here is what you need to consider before purchasing:
1. Match the Correct Part Number
This is the single most critical factor when selecting a key.
- GY20680: This is the most common key used for many residential John Deere lawn tractors, including the D100, LA100, X300, and X500 series.
- AUC12681: This key is specifically designed for ZTrak, EZTrak, and commercial zero-turn mowers. Always verify your mower’s model number and ignition system. Using the wrong key can cause poor ignition contact or potential damage.
2. Decide Between OEM vs. Aftermarket
- OEM Keys (Original Equipment Manufacturer): These are made by John Deere and, for parts like the GY20680 or AUC12681 keys, they guarantee perfect fit, robust quality, and durability. They are best if you prioritize authenticity and long-term reliability.
- Aftermarket Keys: These keys often offer significant cost savings and great value. They work well for most users, provided they list the correct part numbers and are sourced from reputable sellers.
3. Consider Quantity and Value
Your needs dictate the ideal pack size:
- Single OEM key: Ideal if you only need one reliable replacement key.
- 2–3 pack aftermarket keys: Great for backup and essential for peace of mind, as having a spare avoids future downtime.
- 6-pack options: This quantity is best suited for bulk buyers, professional landscapers, or anyone managing multiple compatible machines.
4. Check Compatibility Beyond John Deere
Many keys designed to meet the GY20680 standard can also fit equipment from other manufacturers.
If you own multiple brands of mowers, such as Toro, Murray, Sears, and Craftsman, a universal-fit key can be a smart and cost-effective choice. Ensure you confirm the cross-compatibility before purchasing.
5. Confirm Your Mower Model
Before finalizing your purchase, verify your specific model number:
- Residential riding mowers (D, LA, X series) almost always use the GY20680 key.
- Commercial zero-turn mowers (ZTrak, EZTrak) specifically require the AUC12681 key. Prioritizing the correct part number and verifying compatibility ensures quick, reliable starts and avoids common ignition issues.