BMW 8521661-01 Lock Set Ecu Control Module Ignition Switch Key

( Manufacturer Part Number: 8521661-01 ), ( Part Type: Control Ignition Switch Lock Ecu Module )

Review BMW Lock Set Ecu Control Module Ignition Switch No Key fits K1300 K1300S 2008–2016

The **BMW K1300/K1300S Lock Set (Part Number: 8521661-01)** is a meticulously engineered, high-performance ignition and key control module designed exclusively for BMW s iconic **2011 2016 K1300 and K1300S** motorcycle models. This premium lock set is a critical component of the motorcycle s **ECU (Engine Control Unit) communication system**, ensuring seamless integration between the ignition switch, key, and engine management functions. Crafted to BMW s exacting standards, this module features a **robust, corrosion-resistant construction** with precision-machined internal components, guaranteeing long-term reliability even under demanding riding conditions. The lock set incorporates a **high-security locking mechanism**, preventing unauthorized access while maintaining smooth operation for the rider. It is fully compatible with the motorcycle s **immobilizer system**, ensuring that the engine only starts with the correct key, enhancing security and reducing the risk of theft. Additionally, this module is designed to work in tandem with the **K1300/K1300S s advanced ECU**, providing accurate ignition timing, fuel injection control, and throttle response optimization. Whether installed in a stock configuration or as part of a custom tuning setup, this lock set delivers **consistent performance, durability, and compatibility** with BMW s cutting-edge motorcycle technology. For riders seeking a seamless blend of functionality and security, this part is an essential upgrade or replacement option.

### **Pros and Cons of Buying a BMW K1300/K1300S Ignition Switch Key Lock Set (Part Number: 8521661-01, 2011-2016 Models)**

1. **Authentic BMW Fit and Functionality** This is an original BMW part designed specifically for the K1300/K1300S, ensuring proper integration with the vehicle s electrical system and key programming compatibility. Unlike aftermarket alternatives, it avoids potential issues with improper fit or electrical interference.

2. **Enhanced Security** The ignition switch and lock set play a critical role in preventing unauthorized vehicle access. A genuine BMW part reduces the risk of tampering or failure compared to low-quality aftermarket replacements.

3. **Compatibility with Key Programming** BMW motorcycles require precise key programming for ignition and immobilizer functions. A genuine part ensures that the key will work correctly with the ECU (Engine Control Unit) and other security systems, avoiding issues like no-start conditions or error codes.

4. **Durability and Longevity** BMW parts are built to last, especially in high-quality models like the K1300 series. The ignition switch and lock set are constructed with materials that resist wear, reducing the likelihood of premature failure.

5. **Warranty Coverage** If purchased from an authorized BMW dealer or a reputable supplier, this part may come with a warranty, providing peace of mind against defects or manufacturing issues.

6. **Resale Value Preservation** Using OEM (Original Equipment Manufacturer) parts helps maintain the motorcycle s value, especially if you plan to sell it in the future. Aftermarket parts can sometimes deter potential buyers concerned about reliability.

7. **Professional Installation Compatibility** Many BMW dealerships and specialized mechanics are equipped to handle OEM parts, ensuring a clean and precise installation. This reduces the risk of improper fitting or electrical shorts.

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1. **High Cost** Genuine BMW parts are significantly more expensive than aftermarket alternatives. The price of this ignition switch and lock set will likely be several times higher than a generic replacement, which can be a deterrent for budget-conscious buyers.

2. **Limited Availability** OEM parts may not be as widely stocked as aftermarket options, especially for older or less common models like the K1300. This could require ordering from a dealer or specialty supplier, potentially increasing lead times.

3. **Potential for Overkill** If the ignition switch or lock set is the only failing component, replacing the entire set (even if only one part is defective) may be seen as unnecessary. However, BMW often recommends replacing related components for consistency.

4. **Installation Complexity** While not overly difficult, replacing the ignition switch and lock set on a BMW motorcycle requires some mechanical skill, especially if wiring or programming is involved. DIYers may need to invest time in research or seek professional help.

5. **Key Programming Requirements** If the keys are not already programmed to the motorcycle, you may need to visit a BMW dealer or a professional programmer to ensure the new ignition switch and lock set work correctly with the ECU. This adds an extra cost and inconvenience.

6. **Depreciation Factor** Like all BMW parts, the value of this component depreciates over time. If you re on a tight budget or the motorcycle is older, the expense may not be justified unless it s a critical repair.

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Buying a genuine BMW ignition switch and lock set (part number 8521661-01) for your 2011-2016 K1300/K1300S is the best choice if **reliability, security, and long-term compatibility** are your priorities. The part ensures seamless integration with your motorcycle s electrical and security systems, reducing the risk of future issues. However, the **high cost and potential overkill** for minor repairs may make it less appealing if you re working with a limited budget or only need a single component replaced.

If the ignition switch or lock set is part of a broader issue (e.g., key programming problems, immobilizer errors, or theft prevention), the investment is justified. For isolated failures, weighing the cost against the benefits of an aftermarket alternative (which may be cheaper but less reliable) is advisable.

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- **If you value authenticity, security, and long-term reliability**, purchase the genuine BMW part. Ensure you also have the keys programmed correctly to avoid issues.

- **If you re on a tight budget or only need a minor replacement**, consider a high-quality aftermarket part from a reputable brand (e.g., BMW-compatible brands like **BMW Motorrad, Deka, or Motorex**). However, research reviews thoroughly to avoid poor-quality fakes.

- **If you re unsure about installation or programming**, visit an authorized BMW dealer or a motorcycle specialist to ensure proper fitting and key synchronization.

- **Always verify the part number and compatibility** before purchasing to avoid mismatches, especially since BMW parts can vary slightly between models and years.

Ultimately, the decision depends on your priorities: **prioritize OEM for peace of mind, or opt for aftermarket to save costs if the risk is acceptable.**

Details:

OFFICE USE: LTR-DH 02/26 11BMWK1300S-V94284.

part #: 852166101 prices

• $139.49-$278.99

specifications cycleswitches:

• for models: K1300, K1300s
• for makes: Bmw
• for years: 2008-2016
• mpn: 8521661-01
• part type: Control Ignition Switch Lock Ecu Module

offer cycleswitches:

• started: February 3, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

payments cycleswitches:

• credit card: Mastercard
• other
• wallet: Paypal
• cash

returns cycleswitches:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

seller cycleswitches:

• rating: 100.0%
• # reviews: 88245
• city: Anaheim, California

general cycleswitches:

• Electrical Ignition Components > Electrical Ignition Sensors Switches > Ignition Key Switches
• condition: Used

shipping cycleswitches:

• service: USPS Priority Mail
• class: Expedited
• transit: 3-7 Days
• type: Fixed
• carrier: USPS
• cost: $0.00

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