BMW 707388 Horn Honk Beep Front Bosch Alert Alarm Sensor Engine Hood Bumper

( Manufacturer Part Number: 707388 ), ( Part Type: Horn Hood Alarm Sensor Engine Bumper ), ( Items Included: Horn Button ), ( Material: Metal, Plastic ), ( Features: Horn Controls )

Review BMW Horn Honk Beep Front Bosch Alert Alarm Sensor Engine Hood Bumper Oem fits E46 M3

The **BMW E46 M3 707388 Bosch Horn Honk Beep Front Alarm Sensor** is a high-performance, factory-specification audio alert system designed exclusively for the iconic third-generation BMW M3 (E46), ensuring an authentic and commanding driving experience. Crafted to replicate the precise sound profile of the original Bosch-equipped models, this sensor and horn assembly integrates seamlessly with the vehicle s electrical system, delivering a deep, resonant honk with a crisp, aggressive beep perfect for asserting presence on the road while maintaining the M3 s signature aggression. The unit features a robust **front-mounted Bosch alarm sensor**, which not only enhances the vehicle s security by detecting unauthorized hood or trunk openings but also triggers the horn in response to potential tampering, providing an added layer of protection. Engineered with premium materials, including a durable metal housing and high-quality wiring, this component is built to withstand the rigorous demands of performance driving, ensuring long-term reliability even under extreme conditions. Whether installed in a track-ready M3 or a daily driver, this system elevates the car s auditory presence, making every honk a statement of intent while preserving the vehicle s original character and performance integrity. Ideal for enthusiasts seeking to restore or enhance their E46 M3 s authenticity, this Bosch sensor and horn assembly is a must-have for those who demand nothing less than perfection in both function and form.

### **Pros and Cons of Buying a BMW E46 M3 Horn (Part Number: 707388, Bosch Alert Alarm Sensor, Engine Hood, Bumper Beep)**

1. **Authentic BMW Fitment** The part is designed specifically for the E46 M3, ensuring proper integration with the vehicle s electrical system and mechanical components. This reduces the risk of compatibility issues that can arise with aftermarket or generic replacements.

2. **High-Quality Bosch Brand** Bosch is a well-known manufacturer of automotive components, including sensors and alarms. Their products are generally reliable, durable, and built to meet strict quality standards. The alert alarm sensor is likely to function as intended, providing accurate feedback for the vehicle s warning systems.

3. **Functionality and Safety** The horn beep (alert) system is a safety feature that helps alert drivers to potential issues, such as an open hood, trunk, or door. A properly functioning sensor ensures that the vehicle complies with safety regulations and reduces the risk of accidents caused by unintended obstructions.

4. **Compatibility with Aftermarket Modifications** If you ve modified your E46 M3 (e.g., upgraded suspension, exhaust, or electronics), a genuine or high-quality OEM replacement part like this one is less likely to conflict with aftermarket components compared to cheap or incompatible alternatives.

5. **Resale Value and Perception** Using OEM or high-quality aftermarket parts can enhance the perceived value of your car, especially if you plan to sell it in the future. Potential buyers may view it as a well-maintained vehicle with fewer unknown variables.

6. **Ease of Installation** Since this is a direct replacement part, installation should be straightforward if you have basic mechanical or electrical skills. The part is likely to fit without extensive modifications, saving time and labor costs.

7. **Long-Term Reliability** Bosch components are known for longevity, particularly in critical safety systems. A well-maintained E46 M3 with genuine parts is less likely to experience premature failures in the horn or alert system.

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1. **Cost** OEM or high-quality aftermarket parts like this Bosch sensor and horn assembly will be more expensive than generic or no-name alternatives. For a used E46 M3, this may be a significant upfront cost, especially if multiple parts need replacement.

2. **Aging Stock and Wear** If purchasing a used part, there is a risk that the sensor or horn may already be worn out or damaged. Even if the part looks new, internal components (e.g., wiring, switches) could be degraded, leading to premature failure.

3. **Limited Availability** OEM parts for older BMW models like the E46 can be harder to find, especially if the vehicle is no longer in production. You may need to source the part from specialty dealers, eBay, or international suppliers, which could delay repairs.

4. **Potential for Counterfeit Parts** If buying from third-party sellers, there is a risk of receiving counterfeit or refurbished parts that do not meet OEM standards. Always verify the seller s reputation and the part s authenticity before purchasing.

5. **Electrical Compatibility Issues** While this part is designed for the E46 M3, modifications to the vehicle s wiring or electronics (e.g., ECU tuning, aftermarket alarms) could cause conflicts. If the original wiring harness is damaged or incompatible, additional work may be required.

6. **Maintenance Requirements** Like all mechanical or electrical components, this part will eventually wear out. Regular inspection of the sensor, wiring, and horn is necessary to ensure it continues to function correctly. Neglecting maintenance could lead to sudden failures.

7. **Weight and Aesthetics** The bumper and hood assembly may not match the exact styling of a heavily modified or restored E46 M3. If aesthetics are a priority, you may need to source a custom or aftermarket alternative that better fits your vehicle s appearance.

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Buying a **BMW E46 M3 horn (707388) with Bosch alert alarm sensor, engine hood, and bumper beep** is a practical choice for owners seeking reliability, authenticity, and safety. The part is well-suited for the vehicle, reducing the risk of compatibility issues, and Bosch s reputation ensures quality. However, the higher cost, potential for counterfeit parts, and the need for careful sourcing may be drawbacks, particularly for budget-conscious buyers.

If you prioritize **long-term reliability, safety, and ease of installation**, this is a solid investment. If you are on a tight budget or willing to take risks with aftermarket alternatives, you may explore cheaper options but be prepared for potential downsides like reduced performance or compatibility issues.

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1. **Verify the Part s Condition** If purchasing used, inspect the sensor, wiring, and horn for signs of wear, corrosion, or damage. Test the functionality before installation.

2. **Source from a Trusted Supplier** Buy from reputable dealers, BMW-approved parts suppliers, or well-reviewed online sellers to avoid counterfeit or low-quality replacements.

3. **Consider Aftermarket Alternatives (If Budget is a Concern)** If the cost is prohibitive, research high-quality aftermarket options (e.g., from brands like **AKE, Speedy, or Bosch aftermarket**) that offer similar performance at a lower price.

4. **DIY Installation or Professional Help** If you re comfortable with basic automotive work, installing the part yourself can save labor costs. Otherwise, consult a BMW specialist to ensure proper fitting.

5. **Pair with Routine Maintenance** Regularly check the sensor, wiring, and horn to prevent unexpected failures. Clean contacts and test the system periodically.

**Final Verdict:** For most E46 M3 owners, this **Bosch OEM replacement part is the best choice** due to its reliability and compatibility. However, weigh the cost against your budget and priorities before purchasing. If you re unsure, consult with a mechanic or M3 enthusiast community for additional insights.

Details:

Compatibility. Proof/receipt of work is required. Please match part number. Not sure about the fitment.

This item is in good working condition. Residential delivery fee $200. The exact part number match is the only guarantee of fitment. This item was previously used and MAY show some signs of imperfections such as surface scratches, slight fading, dirt/stains, scuffs, dents/dings normal wear tear.

part #: 707388 price

• $34.99

specifications steeringwheelsiiz:

• for models: E46, M3
• for makes: Bmw
• mpn: 707388
• part type: Horn Hood Alarm Sensor Engine Bumper
• items included: Horn Button
• material: Metal, Plastic
• features: Horn Controls

offer steeringwheelsiiz:

• sold: 0
• quantity: 1
• availability: In Stock
• started: April 14, 2026
• options: Ship-to-home

returns steeringwheelsiiz:

• paid by: Buyer
• policy: Returns Accepted
• time: 14 Days

payments steeringwheelsiiz:

• other
• credit card: Discover
• wallet: Paypal

shipping steeringwheelsiiz:

• carrier: FedEx
• service: FedEx Ground Economy
• type: Fixed
• transit: 3-9 Days
• class: Economy
• cost: $0.00

general steeringwheelsiiz:

• condition: Used
• Car Truck Parts Accessories > Interior Parts Accessories > Steering Wheels Horn Buttons

seller steeringwheelsiiz:

• rating: 99.5%
• # reviews: 2796
• city: Chattanooga, Tennessee

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