CHRYSLER 3870662 Nos Vacuum Switch

( Brand: Chrysler ), ( Manufacturer Part Number: 3870662 ), ( Part Type: Vacuum Switch ), ( Universal Fitment: Direct Replacement ), ( Ipn: E932 13000 Ec903 E1051 212-640 7p1080 ), ( Vintage Part: Yes )

Review CHRYSLER Nos Mopar Ported Vacuum Switch fits E932

The **Chrysler 3870662 NOS Mopar Vacuum Switch** is a meticulously crafted, high-performance component designed to enhance the functionality and efficiency of vintage and modern Chrysler vehicles equipped with vacuum-operated systems. This original equipment-grade (OEM) or new-old-stock (NOS) switch is engineered to replace or complement the factory-installed vacuum switch found in select Chrysler models, including those featuring carbureted engines, fuel injection systems, or auxiliary vacuum applications such as power brakes, emissions controls, or performance enhancements. Constructed from durable materials, this switch is built to withstand the demands of high-vacuum environments while ensuring reliable operation over extended periods. Its robust design incorporates a sturdy metal housing and precision-machined internal components, including a sealed diaphragm or solenoid mechanism, depending on the specific application, which allows for seamless engagement and disengagement of vacuum pressure as needed. Whether used in classic muscle cars like the Chrysler 300, Dodge Charger, or Plymouth Barracuda, or in modern applications requiring aftermarket vacuum control, this switch delivers consistent performance with minimal wear. The 3870662 model, often paired with its counterpart, the **3870652**, is particularly favored by enthusiasts seeking to restore factory functionality or upgrade their vehicle s vacuum system for improved throttle response, emissions compliance, or custom tuning. With its compatibility across a range of Chrysler applications from early 1960s models to later iterations this vacuum switch stands as a testament to Mopar s legacy of precision engineering, offering both authenticity and dependability for those who demand nothing less than original-grade quality.

### **Pros and Cons of buying a Chrysler 3870662 (MOPAR 3870652 Vacuum Switch)**

1. **Compatibility** This vacuum switch is designed specifically for Chrysler vehicles, ensuring a proper fit without modification. It is commonly used in applications such as the **Chrysler 300, Dodge Charger, Dodge Challenger, Jeep Grand Cherokee (2008 2013), and other models with similar vacuum-actuated systems** (e.g., power brake boosters, fuel pumps, or emissions controls).

2. **Reliability** MOPAR (Chrysler s original equipment parts division) parts are engineered to meet factory specifications, reducing the risk of premature failure compared to aftermarket knockoffs. If installed correctly, it should function as intended for the vehicle s lifespan.

3. **Ease of Installation** Since it is an OEM or high-quality aftermarket replacement, wiring and mounting should align with the original design, simplifying installation for those with basic mechanical skills. Most require only basic tools (screwdrivers, wire connectors) and no special equipment.

4. **Cost-Effective for Critical Systems** If the switch is part of a **vacuum-assisted system** (e.g., fuel pump priming, brake booster, or emissions control), replacing a faulty unit prevents larger failures (e.g., engine stalling, brake failure, or check engine lights). This can save money in the long run by avoiding secondary damage.

5. **Widely Available** MOPAR parts are stocked by most auto parts retailers (AutoZone, O Reilly, NAPA, RockAuto), making it easy to purchase without long waits or shipping delays.

6. **Durability** The switch is typically made from metal or high-quality plastic, designed to withstand the operating conditions of the vehicle s underhood environment (temperature fluctuations, vibrations).

7. **Warranty Coverage** Many MOPAR parts come with a **limited warranty** (often 1 year or lifetime for some components), providing peace of mind against defects.

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1. **Potential Counterfeit Issues** Some sellers (especially on eBay or Amazon) may offer **fake or low-quality replicas** that fail prematurely. Always verify the seller s reputation and check for **authentic MOPAR packaging** or a **serial number** matching the part number.

2. **Incorrect Part Number Misapplication** While this switch is common, **not all Chrysler/Dodge/Jeep models use the exact same switch**. Double-check the **year, model, and application** (e.g., fuel pump vs. brake booster) to ensure compatibility. A wrong part may not function or could cause malfunctions.

3. **Diagnostic Challenges** If the switch is part of a **vague symptom** (e.g., intermittent engine stalling, brake booster failure, or check engine light), diagnosing whether it s the actual culprit may require **testing with a vacuum gauge or multimeter**. Replacing it blindly without confirmation could be a waste of money.

4. **Labor Costs if Professional Installation is Needed** While many can install it themselves, some applications (e.g., behind panels or near electrical components) may require **mechanical or electrical expertise**. If DIY is not feasible, labor costs could add up.

5. **Age of the Part** Like all mechanical components, **old stock or long-term stored parts** may degrade. Ensure the part is **new or properly stored** to avoid premature failure.

6. **Compatibility with Modified Vehicles** If the vehicle has been **modified** (e.g., aftermarket fuel systems, brake upgrades, or emissions tuning), the stock vacuum switch may not work optimally. Upgraded systems might require a **higher-flow or modified switch**.

7. **Limited Lifespan in Harsh Conditions** In **extreme heat, cold, or high-vibration environments**, plastic or rubber components in the switch may wear out faster than expected. Regular maintenance checks are advisable.

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The **Chrysler 3870662 (MOPAR 3870652) vacuum switch** is a **reliable, OEM-quality replacement** for its intended applications, offering **proper fit, durability, and ease of installation**. It is a **cost-effective solution** for restoring function to vacuum-assisted systems in Chrysler, Dodge, and Jeep vehicles. However, **buyers must ensure they have the correct part for their specific model and application**, avoid counterfeit products, and confirm the switch is indeed the source of the issue before replacement.

For **most DIYers and mechanics**, this part is a **safe purchase** when sourced from a reputable dealer. If in doubt about compatibility or symptoms, **consult a mechanic or use an online parts database** to verify the correct application.

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- You have confirmed the **exact model and application** (e.g., fuel pump, brake booster) matches the part number.

- You are purchasing from a **trusted retailer** (AutoZone, MOPAR dealer, or a well-reviewed online seller).

- The symptoms (e.g., engine stalling, brake failure) align with a **faulty vacuum switch** (test with a vacuum gauge if possible).

- You are comfortable with **basic wiring and mechanical work** or have access to professional help.

- You cannot confirm the **part s compatibility** with your vehicle s year/model.

- The seller lacks **authentic packaging or clear proof of authenticity**.

- The issue is **not clearly linked to the vacuum switch** (e.g., wiring, sensors, or other components may be at fault).

- You are unsure about **installation complexity** and lack the tools/experience.

- **Cross-reference the part number** with your vehicle s service manual or a parts lookup tool (e.g., RockAuto, Haynes Manual).

- **Test the switch** (if possible) by applying vacuum to the inlet and checking for proper operation (e.g., solenoid engagement, valve movement).

- **Consider a multimeter** to verify electrical continuity if the switch has resistive components.

For most users, this is a **solid, high-quality replacement** when used correctly. Always prioritize **proper diagnosis** before purchasing to avoid unnecessary expenses.

Details:

NOS in box Mopar. Has part number and poetaster on it to prove its authentic.

part #: 3870662 prices

• $35.00-$49.99

specifications emissyste:

• for makes: Mopar, Chrysler
• brand: Chrysler
• mpn: 3870662
• part type: Vacuum Switch
• universal fitment: Direct Replacement
• ipn: E932 13000 Ec903 E1051 212-640 7p1080
• vintage part: Yes

shipping emissyste:

• transit: 5-11 Days
• service: Economy
• type: Fixed
• class: Economy
• cost: $6.50

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New

seller emissyste:

• city: Columbia, Pennsylvania
• rating: 99.6%
• # reviews: 975

offer emissyste:

• options: Ship-to-home
• started: April 19, 2026
• sold: 0
• quantity: 1
• best offers: True
• availability: In Stock

returns emissyste:

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

payments emissyste:

• other
• credit card: Visa
• cash
• wallet: Paypal
• check
• money order

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