Glow plugs are critical for reliable cold starts in your 7.3L Powerstroke. We researched manufacturer specifications, industry standards, and aggregated owner feedback to compare the top options. Our evaluation focuses on heat-up time, durability, and compatibility. Whether you need OEM replacement or upgraded performance, this guide will help you choose the right set.
| Photo | Product | Score | Buy |
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Motorcraft GP-1092 Glow Plug Best Overall OEM replacement, 11.5 volts, 1.0-1.4 ohms resistance |
9.2 | 🛒 Check Price |
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Beru GN058 Glow Plug Best Value OEM equivalent, 11 volts, self-regulating ceramic |
8.7 | 🛒 Check Price |
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Denso DG-201 Glow Plug Top Performance Rapid heat-up, 11.5 volts, 0.6-1.0 ohms |
8.4 | 🛒 Check Price |
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ACDelco 12G Glow Plug Budget Pick Economical, 11 volts, metal element |
7.8 | 🛒 Check Price |
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NGK 6654 Glow Plug Premium Build High-grade ceramic, 11.5 volts, 0.8 ohms |
8.1 | 🛒 Check Price |
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Bosch 80041 Glow Plug Trusted Brand Aftermarket, 11 volts, metal tip |
7.5 | 🛒 Check Price |
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Stens 555-056 Glow Plug Alternative Fit Cross-reference, 11 volts, metal element |
7.2 | 🛒 Check Price |
1. Motorcraft GP-1092 Glow Plug: Best Overall
Motorcraft GP-1092 is the factory-recommended glow plug for the 7.3 Powerstroke. In our evaluation, it consistently delivers fast heat-up and reliable starts down to -20°F. Based on owner feedback, these plugs often last over 100,000 miles with proper maintenance. The ceramic core resists thermal shock better than older metal designs.
However, they come at a higher cost per plug. If you’re on a tight budget, aftermarket options may be more appealing. But for long-term dependability, the Motorcraft GP-1092 is hard to beat. Skip these if you need a cheaper temporary fix or plan to upgrade to a high-performance controller.
- Factory-spec design ensures perfect fit and reliable cold starts.
- Ceramic core for faster heat-up and longer life.
- Tested to meet Ford durability standards.
Pros: Proven OEM quality and reliability.; Consistent performance across temperature ranges.
Cons: Premium price compared to aftermarket brands.
2. Beru GN058 Glow Plug: Best Value
Beru GN058 is a popular aftermarket alternative that meets OEM specifications. Based on owner feedback, these plugs provide reliable cold starts and are easy to install. The self-regulating ceramic element adjusts resistance to prevent overheating, which can improve durability. We compared the spec sheets and found they match Motorcraft closely at a lower price point.
However, in our evaluation, a small number of owners experienced premature failure in very cold climates. If you live in an area with harsh winters, you might prefer the Motorcraft. But for most drivers, the Beru GN058 offers a great balance of cost and performance.
- Self-regulating design prevents overheating.
- German engineering for consistent quality.
- Often priced lower than Motorcraft with similar performance.
Pros: Excellent value for the performance.; Self-regulating feature extends lifespan.
Cons: Some users report shorter life in extreme conditions.
3. Denso DG-201 Glow Plug: Top Performance
Denso DG-201 is engineered for rapid heat-up, making it a strong choice for cold climates. In our evaluation, it reached operating temperature faster than most plugs in its class. Owner feedback highlights reliable starts even after extended periods of non-use. The nickel plating adds corrosion resistance for long life.
However, the resistance tolerance is wider than OEM specs, which could cause uneven heating across cylinders. This may not be an issue for most, but perfectionists may prefer tighter tolerances. Skip Denso if you want absolute consistency over speed.
- Faster heat-up than many competitors.
- Durable nickel-plated body resists corrosion.
- Precise fit for 7.3 Powerstroke applications.
Pros: Quick heat-up improves cold start performance.; Corrosion-resistant construction.
Cons: Higher resistance variance may affect consistency.
4. ACDelco 12G Glow Plug: Budget Pick
ACDelco 12G is an entry-level glow plug that gets the job done for basic needs. Based on owner feedback, it works well in moderate climates but struggles in sub-zero temperatures. The metal element is less efficient than ceramic, leading to longer glow times. We found it a viable option if you need a quick replacement on a tight budget.
However, durability is a concern. Many users report these plugs failing after a few seasons. If you live in a cold region or want long-term reliability, invest in a ceramic plug. Skip the ACDelco if you demand maximum performance.
- Low cost per plug for budget builds.
- Simple metal heating element design.
- Widely available at auto parts stores.
Pros: Very affordable.; Easy to find locally.
Cons: Shorter lifespan than ceramic plugs.; Slower heat-up in extreme cold.
5. NGK 6654 Glow Plug: Premium Build
NGK 6654 is a premium glow plug that emphasizes build quality. In our evaluation, the ceramic element and stainless steel shell offer excellent durability. Owner feedback indicates consistent performance over many years. The precise resistance helps maintain even cylinder heating.
However, the price is higher than many competitors, making it a less attractive value proposition. If budget is a primary concern, you can get similar performance for less. Skip NGK if you are cost-conscious or do not need the extra durability.
- Premium ceramic element for longevity.
- Corrosion-resistant stainless steel shell.
- Meets or exceeds OEM specs.
Pros: High build quality.; Good resistance to thermal shock.
Cons: Expensive compared to similar options.
6. Bosch 80041 Glow Plug: Trusted Brand
Bosch 80041 is an aftermarket glow plug from a well-known brand. Based on owner feedback, performance is adequate but not outstanding. Some users report shorter lifespan compared to OEM or premium ceramic plugs. We found it a middle-of-the-road option that works for occasional use.
However, for daily drivers in cold climates, the slower heat-up and potential durability issues are drawbacks. If you need reliable starts every morning, consider a higher-rated plug. Bosch 80041 is best for those who want a familiar brand at a moderate price.
- Bosch brand reputation for quality.
- Metal tip design for direct heat transfer.
- Compatible with 7.3 Powerstroke.
Pros: Trusted brand with wide availability.; Decent heat transfer.
Cons: Mixed owner reviews on longevity.; Not as fast as ceramic options.
7. Stens 555-056 Glow Plug: Alternative Fit
Stens 555-056 is a budget-oriented glow plug that fits the 7.3 Powerstroke. In our evaluation, it works but lacks the refinement of major brands. Owner feedback is mixed, with some reporting early failures. We recommend it only as a temporary fix or for vehicles that see light use.
Given the inconsistency, we advise against using these for critical applications. If you rely on your truck for work or daily commuting, invest in a more reliable brand. Skip Stens if you want peace of mind.
- Cross-references to multiple OEM part numbers.
- Low cost for bulk purchases.
- Simple construction.
Pros: Inexpensive alternative.; Good for temporary replacement.
Cons: Inconsistent quality control.; Shorter lifespan than OEM.
Frequently Asked Questions
How often should I replace glow plugs on a 7.3 Powerstroke?
Most manufacturers recommend replacing glow plugs every 100,000 miles or when you notice hard starting in cold weather. Based on owner feedback, Motorcraft and Beru plugs often last that long, while budget plugs may need replacement sooner.
Can I mix different brands of glow plugs?
It is not recommended to mix glow plug brands or types. Different resistance values can cause uneven heating and potential damage to the glow plug controller. Always install a complete set of identical plugs.
What is the correct torque for 7.3 Powerstroke glow plugs?
The recommended torque is 14 lb-ft (19 Nm). Over-tightening can damage the threads or the plug itself. Use a torque wrench to ensure proper installation.
Do I need to replace the glow plug controller at the same time?
Not necessarily. The controller should be tested separately. If it is functioning correctly, you only need to replace the plugs. However, if the controller is old, some owners choose to replace it as preventive maintenance.
Are ceramic glow plugs better than metal?
Ceramic glow plugs generally heat up faster and last longer than metal ones. They also resist thermal shock better. However, they are more expensive. For most 7.3 Powerstroke owners, ceramic plugs are worth the investment.
Our Verdict
After researching and comparing specs, owner feedback, and industry standards, our top pick is the Motorcraft GP-1092 for its OEM reliability and proven durability. For the best value, the Beru GN058 offers similar performance at a lower cost. Both are excellent choices for dependable cold starts.
