AUTOZONE PS527 Duralast Switch Interrupter

( Brand: Autozone ), ( Type: Electrical ), ( Ipn: Ps527 ), ( Manufacturer Warranty: Lifetime ), ( Fitment Type: Direct Replacement )

Review AUTOZONE Duralast Switch Interrupter

The **Autozone PS527 Duralast Switch Interrupter** is a high-performance, heavy-duty electrical component designed to provide reliable protection and control for automotive electrical systems, particularly in applications where robust switching and current interruption are critical. Engineered with durability in mind, this switch interrupter is built using **Duralast s premium materials**, including high-grade copper contacts and a robust metal housing, ensuring exceptional resistance to corrosion, heat, and mechanical stress. Its compact yet sturdy design makes it ideal for installation in tight engine bays or under-hood environments where space is limited but performance cannot be compromised. The PS527 is specifically crafted to handle **high-amperage loads with precision**, making it a trusted choice for restoring or upgrading older vehicles with aging electrical systems prone to intermittent failures or blown fuses. Whether used to replace a faulty switch in a **cruise control, power window, or accessory circuit**, this interrupter delivers consistent operation, minimizing the risk of electrical shorts, arcing, or premature wear on wiring harnesses. Its **sealed construction** prevents moisture and debris ingress, which is essential for maintaining long-term reliability in demanding automotive conditions. For mechanics and DIY enthusiasts alike, the PS527 offers a cost-effective solution that combines **OEM-quality performance with aftermarket convenience**, ensuring seamless integration into existing wiring diagrams without the need for complex modifications. With its **universal compatibility** across a wide range of vehicle makes and models, this switch interrupter stands as a dependable upgrade for anyone seeking to eliminate electrical gremlins and restore confidence in their vehicle s electrical system.

### **Pros and Cons of buying a AutoZone PS527 Duralast Switch Interrupter**

The **AutoZone PS527 Duralast Switch Interrupter** is a popular aftermarket replacement part designed for vehicles with the **PS527 ignition switch assembly**. Here are its key advantages:

1. **Compatibility and Reliability** This part is specifically engineered to replace the stock ignition switch in vehicles like the **2005 2010 Ford Mustang, 2005 2011 Ford Fusion, and 2006 2012 Mercury Milan**. It is built to meet or exceed OEM standards, reducing the risk of electrical issues or failure.

2. **Durability and Quality** Duralast is a trusted brand under **Bosch**, known for producing high-quality automotive components. The switch is designed to withstand frequent use without excessive wear, improving longevity compared to some generic aftermarket alternatives.

3. **Easy Installation** The part is designed for straightforward replacement, often requiring only basic tools. Many users report that it fits without modification, though wiring harnesses may need inspection for corrosion or damage.

4. **Cost-Effective Alternative to OEM** Compared to purchasing an **original equipment manufacturer (OEM) replacement switch**, the Duralast version is significantly cheaper while maintaining reliability. This makes it an attractive option for budget-conscious buyers.

5. **Improved Functionality** Some users report that the Duralast switch provides a **smoother engagement** and **better electrical contact** than the original, reducing issues like intermittent power loss or difficulty turning the key.

6. **Warranty Coverage** AutoZone typically offers a **limited warranty** on Duralast parts, providing some peace of mind against premature failure.

---

1. **Mixed User Experiences with Key Fob Functionality** Some owners of vehicles with **keyless ignition systems** (common in later-model Mustangs and Fusions) report that the Duralast switch may not work seamlessly with the **push-button start** feature. This can require additional troubleshooting or even a separate keyless ignition module replacement.

2. **Potential for Electrical Issues** If the vehicle s wiring harness is corroded or damaged, replacing just the switch may not fully resolve electrical problems. A thorough inspection of the **ignition cylinder, steering column wiring, and ground connections** is recommended before installation.

3. **Not a Universal Fix for All Ignition Problems** If the issue stems from a **faulty ignition cylinder, steering column damage, or a failing steering lock solenoid**, replacing just the switch may not solve the problem. A full diagnostic is advised.

4. **Installation Challenges in Some Vehicles** While generally straightforward, certain models (particularly those with **steering column covers or additional wiring harnesses**) may require extra care during installation. Improper handling could lead to damage.

5. **Quality Variability in Aftermarket Parts** Though Duralast is reputable, some cheaper generic switches may not match the same build quality. Always verify the part number and source to ensure authenticity.

6. **Limited Long-Term Data** While Duralast is reliable, long-term performance data (beyond 5 10 years) may not be as extensive as with OEM parts, though this is less of an issue for most drivers.

---

The **AutoZone PS527 Duralast Switch Interrupter** is a **strong, cost-effective replacement** for vehicles with ignition switch failures, offering **reliability, ease of installation, and compatibility** with many Ford models. It is particularly well-suited for drivers experiencing **key-related issues, intermittent power loss, or a worn-out stock switch**.

However, it is **not a universal solution** if the problem involves **steering column damage, keyless ignition malfunctions, or electrical corruption**, additional repairs may be necessary. Before purchasing, ensure the part matches your vehicle s **year, model, and ignition system type**.

For most users seeking a **budget-friendly, high-quality replacement**, the Duralast switch is an excellent choice. Those with **complex electrical issues or keyless start problems** may need to consult a mechanic or consider a **full ignition system overhaul**.

- You have a **2005 2010 Mustang, 2005 2011 Fusion, or 2006 2012 Milan** with a **failing stock ignition switch**.

- You are comfortable with **basic wiring and installation**.

- Your issue is **isolated to the switch** (no steering column or keyless start problems).

- Your vehicle has **keyless push-button start issues** (may require a separate keyless ignition module).

- The **steering column or wiring harness shows significant wear**.

- You prefer **OEM parts** for maximum compatibility (though they are more expensive).

- Inspect the **ignition cylinder, steering column wiring, and ground connections**.

- Test the **key fob and push-button start function** if applicable.

- Follow **AutoZone s installation guide** carefully to avoid damage.

For most drivers, the **Duralast PS527 is a reliable and practical choice** that balances cost and performance effectively.

Details:

Made by Autozone, this switch interrupter comes with a lifetime warranty for added peace of mind. The Duralast PS527 Switch Interrupter is a high-quality electrical component designed for direct replacement in vehicles.

part #: ps527 prices

• $40.00-$62.99

specifications boosttempgauges:

• brand: Autozone
• type: Electrical
• ipn: Ps527
• manufacturer warranty: Lifetime
• fitment type: Direct Replacement

returns boosttempgauges:

• policy: No Returns

offer boosttempgauges:

• quantity: 1
• sold: 0
• started: April 13, 2026
• availability: In Stock
• options: Ship-to-home

payments boosttempgauges:

• other
• credit card: Diners-club
• wallet: Apple-pay

seller boosttempgauges:

• # reviews: 24
• rating: 88.9%
• city: Chicago, Illinois

shipping boosttempgauges:

• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• transit: 4-10 Days
• cost: $5.45
• type: Calculated

general boosttempgauges:

• condition: New
• Interior Parts Accessories > Gauges > Individual Gauges