If you own a Dodge or Ram diesel truck, a reliable intake air heater relay is essential for optimal engine cold-start performance and durability. Intake air heater relays ensure proper operation of the heater grid, preventing cold start issues and improving engine efficiency. Below is a summary table of the best intake air heater relays compatible with popular Dodge and Ram models, helping you select a replacement designed for durability and OE-level fitment.
| Product | Brand | Compatible Models | Key Features |
|---|---|---|---|
| Dorman 904-356 Intake Heater Relay | Dorman | Select Dodge Models | OE fit & function, durable, direct replacement |
| Dorman 904-300 Intake Heater Relay | Dorman | Select Dodge/Ram Models | Reliable performance, fatigue-resistant, quality parts |
| EATAKWARD 68188401AA Intake Manifold Heater Relay | EATAKWARD | Dodge Ram 2500/3500 1994-2002 Diesel | OE-quality, exact fit, solves cold start problems |
| Xspeedonline Premium Relay Solenoid | Xspeedonline | 1994-2002 Dodge Ram 2500/3500 Diesel | OEM standard, fully tested, direct part replacement |
| SPJIUQI 12V Air Intake Heater Relay | SPJIUQI | 2008-2018 Dodge Ram 2500-5500 Diesel | Compatible with Dorman 904-300, multi-part number fit |
Dorman 904-356 Intake Heater Relay for Dodge

This Dorman 904-356 Intake Heater Relay provides a direct replacement designed to match the original relay’s fit and function for select Dodge models. Its durable construction features quality components to deliver reliable and long-lasting performance. This relay is ideal for replacing faulty or fatigued OE parts, ensuring stable heater grid operation to avoid cold start issues. Its robust design supports engine efficiency and reliability even under continuous usage.
Dorman 904-300 Heater Relay for Dodge/Ram

The Dorman 904-300 Intake Heater Relay is a durable and reliable replacement tailored for select Dodge and Ram trucks. Crafted to match the original fit and function, it effectively resolves issues related to heater relay fatigue and failure. The product assures longevity with quality materials, helping maintain proper air intake heating and avoiding engine starting difficulties during cold weather.
EATAKWARD 68188401AA Intake Manifold Heater Relay

This EATAKWARD relay boasts OE-quality components, providing a perfect fit and function for Dodge Ram 2500 and 3500 5.9L diesel models from 1994 to 2002. The relay bolsters reliability by addressing cold start problems, such as inlet heater errors and relay cycle failures. Its sturdy, wear-resistant grid construction guarantees long service life and hassle-free installation, making it a trustworthy replacement option.
Xspeedonline Premium Relay Solenoid for Ram Diesel

This Xspeedonline intake heater relay meets or exceeds OEM standards and undergoes 100% testing throughout the manufacturing process for guaranteed quality. Designed as a direct replacement for part numbers like 68188401AA and 904-308, it fits 1994-2002 Dodge Ram 2500 and 3500 diesel engines. This relay is a top-quality option for ensuring reliable heater grid control and preventing engine start-up complications in cold conditions.
SPJIUQI 12V Air Intake Heater Relay for Dodge Ram

The SPJIUQI 12V Air Intake Heater Relay replaces the Dorman 904-300 and supports a wide range of Dodge Ram diesel trucks from 2008 through 2018, covering 5.9L and 6.7L engines. It carries multiple part numbers for easy compatibility and features a 4-terminal solenoid design. This relay ensures consistent heater grid activation for smooth cold starts and improved engine efficiency in turbo diesel vehicles.
Buying Guide for Intake Air Heater Relays
Choosing the correct intake air heater relay is vital for efficient diesel engine operation, especially in colder climates. Here are key factors to consider before purchasing:
- Compatibility: Confirm that the relay fits your specific vehicle make, model, engine size, and year range. Most relays list part numbers and compatible models to ease selection.
- OE Fit and Function: Opt for relays designed as direct replacements that match original equipment manufacturer (OEM) specifications. This ensures proper installation, performance, and durability.
- Build Quality: Durable components increase relay lifespan and reliability, reducing maintenance frequency and potential cold start issues.
- Brand Reputation: Recognized brands like Dorman often offer tested and verified products, while lesser-known brands may also supply OE-quality parts but require careful evaluation.
- Warranty and Customer Support: Consider products with warranties or responsive customer service to protect your investment.
- Installation Ease: Look for relays with straightforward installation requiring minimal tools or modifications.
Comparing the above features in multiple products helps ensure optimal performance and longevity of your intake air heater relay, supporting reliable cold-start operation and engine longevity in your Dodge or Ram diesel truck.