GM DELCO 4939546 Nos Passenger Wiper Motor Relay

( Brand: Gm Delco ), ( Manufacturer Part Number: 4939546 ), ( Part Type: Wiper Motor ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review GM DELCO Nos Chevy Bop Passenger Wiper Motor Relay Assy fits 1965–1967

The **GM Delco 4939546 Original Equipment (OEM) Passenger Wiper Motor Relay** is a meticulously crafted, high-performance electrical component designed exclusively for 1965 through 1966 Chevrolet passenger vehicles, including models like the Impala, Bel Air, and Caprice. This relay serves as the critical interface between the vehicle s ignition system and the wiper motor, ensuring seamless operation of the passenger-side windshield wipers while maintaining optimal electrical flow and protection against voltage spikes. Engineered to meet the exacting standards of General Motors original equipment specifications, this relay features a robust, corrosion-resistant construction with precision-molded internal contacts and a durable, high-temperature-resistant housing, guaranteeing long-term reliability even under demanding conditions. Its compact yet sturdy design allows for easy installation within the vehicle s wiring harness, fitting seamlessly into the original mounting location without the need for modifications. The relay s internal mechanism is calibrated to provide smooth, consistent activation of the wiper motor, eliminating common issues like intermittent operation, burning smells, or premature failure often associated with aftermarket or generic replacements. Whether restoring a classic Chevrolet to its original condition or addressing a specific electrical fault, this NOS (New Old Stock) relay ensures authentic performance and compatibility, preserving the integrity of the vehicle s original wiring and electrical system. Ideal for enthusiasts and mechanics seeking a direct-fit, high-quality solution, this relay is a testament to GM s engineering precision, offering a perfect blend of durability, functionality, and historical accuracy.

**Pros and Cons of Buying a NOS (New Old Stock) GM Delco 4939546 Passenger Wiper Motor Relay (1965-1967 Chevy)**

1. **Authentic Fit and Function** A NOS relay is guaranteed to be original equipment from the manufacturer, ensuring an exact match in terms of specifications, wiring, and performance. This eliminates compatibility issues that can arise with aftermarket or remanufactured parts.

2. **Reliability and Durability** Since the relay was never installed in a vehicle, it has not been subjected to wear, corrosion, or environmental damage. This means it is likely to function as well as it did when new, potentially lasting the lifetime of the vehicle if properly maintained.

3. **Historical Accuracy** For classic car enthusiasts, restoring a vehicle with NOS parts preserves its originality and authenticity. This is particularly valuable for show cars, concours entries, or collectors who prioritize historical integrity over cost savings.

4. **No Risk of Counterfeit or Mismatched Parts** Aftermarket or remanufactured relays may not replicate the original design perfectly, leading to potential electrical issues or mechanical failures. A NOS part eliminates this risk.

5. **Potential for Higher Resale Value** If the vehicle is restored with NOS components, it may retain or even increase in value, especially in the classic car market where authenticity is highly valued.

6. **No Need for Replacement Soon After Installation** Since the relay is unused, there s no concern about immediate failure due to pre-existing wear, which can be a risk with used or refurbished parts.

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1. **High Cost** NOS parts are significantly more expensive than aftermarket or used equivalents. The price reflects their rarity, demand, and the fact that they have never been installed. For budget-conscious restorers, this can be a major drawback.

2. **Limited Availability** NOS parts are not mass-produced today, and stock can be depleted quickly. Finding the exact relay you need may require searching multiple sources, including online marketplaces, auctions, or specialty classic car parts dealers, which can be time-consuming.

3. **No Warranty or Return Policy** Since NOS parts are essentially "as-is," sellers typically do not offer warranties or return policies. If the relay fails due to an internal defect (though unlikely, given its unused condition), you may be out of luck without proof of damage.

4. **Storage and Handling Risks** NOS parts are often stored in environments that may expose them to moisture, dust, or temperature fluctuations over decades. While the relay itself may be pristine, the packaging or shipping conditions could introduce contamination or damage during transit.

5. **Opportunity Cost** The funds spent on a NOS relay could potentially be allocated to other aspects of the restoration, such as labor, additional original parts, or upgrades that enhance the vehicle s performance or comfort.

6. **Overkill for Functional Use** If the vehicle is primarily driven for daily use rather than preservation or competition, the benefits of a NOS relay may not justify the cost. A high-quality aftermarket or remanufactured relay could serve the same purpose at a fraction of the price.

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The decision to purchase a NOS GM Delco 4939546 passenger wiper motor relay depends on your priorities, budget, and the intended use of the vehicle.

- You are restoring a classic Chevy for historical accuracy, concours, or resale value.

- You prioritize authenticity and are willing to invest in parts that match the original build.

- You have the budget to allocate to high-quality, original components without compromising other restoration goals.

- You are on a tight budget and need to allocate funds to more critical or frequently used parts.

- The vehicle is primarily a daily driver, and functional reliability is more important than historical perfection.

- You can find a high-quality aftermarket or remanufactured relay that meets your needs at a significantly lower cost.

For most restorers, a balance between NOS and aftermarket parts is ideal using NOS for critical or visible components where authenticity matters most, and opting for cost-effective alternatives elsewhere. If you do decide to purchase the NOS relay, verify its condition upon receipt (check for moisture damage, corrosion, or physical defects) and handle it carefully to preserve its integrity.

Details:

Thankful kin at . NOS 4939546 1965 - 1967 GM Chevy BOP Passenger Wiper Motor Relay Control Essayists or UPS, Insured in Continental USA.

part #: 4939546 prices

• $69.50-$129.99

specifications winshielwip:

• for makes: Chevy
• for years: 1965-1967
• brand: Gm Delco
• mpn: 4939546
• part type: Wiper Motor
• vintage part: Yes
• country of origin: United States

seller winshielwip:

• city: wood burn, Oregon
• rating: 100.0%
• # reviews: 11949

payments winshielwip:

• wallet: Paypal
• credit card: Diners-club
• other

returns winshielwip:

• policy: No Returns

shipping winshielwip:

• class: Standard
• service: USPS Ground Advantage
• cost: $8.95
• transit: 5-9 Days
• carrier: USPS
• type: Calculated

general winshielwip:

• Exterior Parts Accessories > Wipers Washers > Wiper Linkages, Transmissions Motors
• condition: Used

offer winshielwip:

• quantity: 1
• availability: In Stock
• started: March 1, 2026
• options: Ship-to-home
• best offers: True
• sold: 0

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