1. NISSAN Controls & Control Units On Sale
  2. sku: 9334278493491731
  3. STANDARD PRODUCTS 79TTZG

STANDARD MOTOR PRODUCTS 79TTZG Control Relay A/c

fits model: Sentra. make: Nissan. year: 1986–1990.

79ttzg Standard Motor Products A/c Control Relay Fits Nissan Sentra 1986-1990

( Brand: Standard Motor Products ), ( Manufacturer Part Number: 79TTZG ), ( Part Type: Control Motor ), ( Compatible Make/model: Nissan Sentra ), ( Compatible Years: 2007 2002 2004 2001 2006 2000 1986 1987 1988 1989 1990 07 02 04 ), ( Fitment Info: A/c Compressor Control Relay ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review STANDARD MOTOR PRODUCTS A/c Control Relay Nissan fits SENTRA 1986–1990

The **Standard Motor 79TTZG A/C Control Relay** is a high-quality, direct-fit replacement designed specifically for Nissan Sentra models manufactured between **1986 and 1990**, ensuring seamless integration with the vehicle s electrical system. This relay serves as a critical component in the air conditioning control circuit, allowing the A/C compressor clutch to engage and disengage smoothly based on driver input from the climate control panel. Engineered with precision, this relay features a robust **SPDT (Single Pole Double Throw)** configuration, providing reliable switching between the ground and power paths required to activate the compressor clutch. Constructed from durable materials, it is built to withstand the demands of frequent engagement, reducing the risk of electrical arcing or premature failure common issues with inferior aftermarket parts. The **79TTZG** designation ensures compatibility with the original equipment manufacturer (OEM) specifications, matching the physical dimensions, pinout, and electrical ratings of the factory relay, which helps maintain optimal performance and longevity. Whether replacing a faulty relay that has caused intermittent A/C operation or upgrading for added reliability, this relay delivers consistent performance under varying electrical loads, ensuring your Sentra s cooling system functions efficiently in all driving conditions. Its compact yet sturdy design fits perfectly into the vehicle s fuse/relay box, making installation straightforward for both DIY enthusiasts and professional mechanics. Trusted for its dependability, this relay is an essential upgrade for anyone seeking to restore or enhance their Sentra s air conditioning functionality without compromising on quality.

### Pros and Cons of Buying a Standard Motor 79TTZG A/C Control Relay for a 1986-1990 Nissan Sentra

#### **Pros:**

1. **Compatibility** This relay is specifically designed for the A/C control system in Nissan Sentras from 1986 to 1990, ensuring a direct fit without modifications.

2. **Reliability** Standard Motor is a reputable brand known for producing high-quality automotive relays that are built to last, reducing the risk of frequent failures.

3. **Easy Installation** Relays are simple to replace, requiring minimal tools and basic mechanical knowledge. No wiring changes are typically needed beyond disconnecting the old relay.

4. **Cost-Effective** Compared to repairing or replacing an entire A/C control module, a relay is a low-cost solution that can resolve intermittent A/C issues without major expenses.

5. **Prevents Further Damage** If the original relay was failing, replacing it early can prevent damage to the A/C compressor, clutch, or other components, saving money in the long run.

6. **Widely Available** This relay is a common aftermarket part, so it can be easily sourced from online retailers, auto parts stores, or eBay, often with quick shipping.

7. **Standardized Design** The 79TTZG designation indicates a standard form factor (7-pin relay), making it interchangeable with other relays in the same housing if needed for future repairs.

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#### **Cons:**

1. **Potential Counterfeit Risk** Some online sellers may offer fake or low-quality relays, which could fail prematurely or even damage the vehicle s electrical system. Buying from trusted sellers (e.g., Amazon, RockAuto, or local auto parts stores) mitigates this risk.

2. **Intermittent Issues** If the original problem stems from a faulty wiring connection, corroded terminals, or a failing A/C compressor clutch, replacing just the relay may not fully resolve the issue. A thorough diagnosis is recommended.

3. **Limited Lifespan** While relays are durable, they can wear out over time, especially if the vehicle is frequently used in extreme climates or has electrical fluctuations. Replacement may still be needed after several years.

4. **No Warranty on Some Retailers** Some budget sellers may not offer warranties or return policies, leaving you without recourse if the relay fails shortly after purchase.

5. **Misdiagnosis Risk** If the A/C system has multiple underlying issues (e.g., low refrigerant, faulty pressure switch, or a bad compressor), replacing the relay alone might not fix the problem, leading to frustration and additional costs.

6. **Physical Access Challenges** Depending on the Sentra s A/C control panel layout, locating and replacing the relay may require some disassembly (e.g., removing the dashboard or A/C vents), which could be time-consuming for inexperienced DIYers.

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### **Conclusion:**

Buying a **Standard Motor 79TTZG A/C Control Relay** for a 1986 1990 Nissan Sentra is a practical and cost-effective solution for addressing A/C control relay failures. The relay s compatibility, reliability, and ease of installation make it a strong choice for resolving issues like the A/C not turning on, cycling off unexpectedly, or failing to engage the compressor clutch. However, it s crucial to ensure the relay is genuine and that the underlying cause of the problem (e.g., wiring, refrigerant levels, or compressor health) is also addressed to prevent recurring issues.

For best results:

- **Verify the relay s authenticity** by purchasing from a reputable seller.

- **Test the relay** with a multimeter or by swapping it with a known-good relay from another system (if possible) to confirm it s the root cause.

- **Inspect related components** (wiring harness, fuses, A/C clutch, and refrigerant levels) to rule out other potential problems.

- **Consider professional diagnosis** if the A/C issue persists after relay replacement, as deeper electrical or mechanical faults may exist.

### **Recommendation:**

If you re confident in your ability to diagnose and replace the relay, proceed with purchasing the **Standard Motor 79TTZG A/C Control Relay** from a trusted source like RockAuto, Amazon, or a local auto parts store with a return policy. Pair this with a basic check of the A/C system s wiring and fuses to maximize success. If the A/C problem remains unresolved after replacement, consult a mechanic to avoid unnecessary repairs. For most DIYers, this relay is a worthwhile and low-risk upgrade.

Details:

Renowned Global Manufacturer: As a global manufacturer of original equipment ignition Products, we maintain complete quality control throughout the manufacturing process from component to finished product. Detailed Applications Years: Vehicle: 1986 - 1990 Nissan Sentra. Product Specifications Contents: Relay. Standard Motor Products A/C Control Relay fits Nissan Sentra 1986 - 1990 79TTZG: Brand: condition: New Notes: Compressor Relay, Features:Built to Last: Our relays feature high-quality composite housings that protect against harsh temperatures and the most demanding under-hood conditions, ensuring lasting reliability.

Enhanced Wear Resistance: Featuring brass or copper contacts where specified, our relays offer extended wear resistance, ensuring reliability even in high-stress applications.

part #: 79ttzg price

  • $42.74

specifications nssnheatcontrol:

  • for models: Sentra
  • for makes: Nissan
  • for years: 1986-1990
  • brand: Standard Motor Products
  • mpn: 79ttzg
  • part type: Control Motor
  • compatible make/model: Nissan Sentra
  • compatible years: 2007 2002 2004 2001 2006 2000 1986 1987 1988 1989 1990 07 02 04
  • fitment info: A/c Compressor Control Relay
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

general nssnheatcontrol:

  • Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units
  • condition: New

seller nssnheatcontrol:

  • rating: 99.1%
  • # reviews: 23737
  • city: Horsham, Pennsylvania

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offer nssnheatcontrol:

  • options: Ship-to-home
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  • availability: In Stock
  • started: April 3, 2026
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for models: sentra, for makes: nissan, for years: 1986-1990, part type: control motor, compatible make/model: nissan sentra, compatible years: 2007 2002 2004 2001 2006 2000 1986 1987 1988 1989 1990 07 02 04, fitment info: a/c compressor control relay, manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 9334278493491731,
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1 offer $42.74 USD
  • New. Offer #1 priced at $42.74 + $0.00 shipping estimate = $42.74* total. Built to Last: Our relays feature high-quality composite housings that protect against harsh temperatures and the most demanding under-hood conditions, ensuring lasting reliability. 1986-1990 Nissan Sentra.FREE SHIPPING

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