If your diesel truck or SUV is struggling with fuel delivery or emissions, an injection pump upgrade can be a game-changer. Whether you’re dealing with a failing smog pump or want to swap a fragile CP4 for a robust CP3, the right upgrade restores performance and peace of mind.
This guide reviews ten top-rated injection pump upgrades, covering fitment, OE numbers, and key features. You’ll learn what to look for and which product suits your vehicle best, helping you make a confident choice without the guesswork.
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A-Premium Secondary Air Injection Pump Smog Pump
Best forMercedes V6 and V8 models
- Broad Mercedes fitment
- Matches OE reference numbers
ConsiderNot OEM quality
YZHIDIANF Upgraded 17610-0W020 Secondary Air Injection Pump Smog Pump fit F…
Best forTacoma 4.0L 2011-2015 owners
- Exact OE replacement
- Covers multiple trims
ConsiderOnly fits 4.0L engines
A-Premium Secondary Air Injection Pump Smog Pump
Best forChevy and GMC 2001-2002 trucks
- Fits multiple GM models
- Durable plastic-aluminum mix
ConsiderLimited to early 2000s
BIGREAT CP4 to CP3 Fuel Injection Pump Upgrade Conversion Kit
Best forDuramax LML reliability upgrade
- Eliminates CP4 failure risk
- Improves fueling capacity
ConsiderComplex installation
A-Premium 2 PCS Secondary Air Injection Smog Pump
Best forLexus LX570 and Land Cruiser
- Two pumps for dual replacement
- High-temp endurance
ConsiderOnly one pump per package
Bosch Automotive 0580000025 Original Equipment Secondary Air injection Pump –
Best forOEM-grade Mercedes replacement
- True OE quality
- Exact fit and function
ConsiderHigher price point
SZKAIDAG 17610-0C020 Secondary Air Injection Pump Smog Pump for:-Toyota Tac…
Best forTacoma 2.7L 2005-2015 owners
- Strict quality control
- Direct OE replacement
ConsiderOnly fits 2.7L engines
YZHIDIANF Upgraded Secondary Air Injection Pump Smog Pump fit for:-Mercedes…
Best forMercedes and Crossfire owners
- Covers multiple brands
- Matches several OE numbers
ConsiderFitment varies by model
SZKAIDAG Secondary Air Injection Pump Fits For:-Toyota Tundra 2007-2013, Se…
Best forToyota and Lexus V8 trucks
- Two pumps included
- Broad Toyota/Lexus fitment
ConsiderOnly fits specific years
YZHIDIANF Upgraded 12610063 Secondary Air Injection Pump Smog Pump fit For:…
Best forColorado and Canyon 2007-2012
- Multiple vehicle fitment
- Strict quality control
ConsiderLimited to certain engines
A-Premium Secondary Air Injection Pump – Mercedes Fit
Brand: A-Premium
A reliable, budget-friendly smog pump for many Mercedes models.
This A-Premium pump is a solid choice for Mercedes-Benz owners with V6 and V8 engines from the mid-2000s to early 2010s. It covers models like the C230, C300, and GL550, with reference numbers matching OE parts like 0001404685 and 0580000025. The plastic construction keeps weight down, and the female connector with two pin terminals ensures a straightforward plug-in.
You’ll appreciate the three hose connectors, which align with factory plumbing for a hassle-free install. While it’s not an OEM part, the fitment list is extensive, making it a practical replacement for worn-out smog pumps. Just verify your exact model and engine size before ordering to avoid compatibility issues.
- Broad Mercedes fitment
- Matches OE reference numbers
- Lightweight plastic build
- Not OEM quality
- Limited to specific years
YZHIDIANF Upgraded Smog Pump – Toyota Tacoma 4.0L
Brand: YZHIDIANF
A dependable upgrade for Tacoma 4.0L models needing a new smog pump.
Designed for Toyota Tacoma 4.0L trucks from 2011 to 2015, this YZHIDIANF pump replaces OE numbers 17610-0W020 and 17600-0P040. It fits both automatic and manual transmissions, including TRD Pro trims, giving you broad coverage across the model range. The upgraded design aims to improve airflow and durability over the factory unit.
Installation is straightforward, with the pump bolting directly into the stock location. The brand’s 30 years of experience in auto parts adds confidence, and their after-sales team is ready to assist if you hit any snags. Just use the Amazon Confirmed Fit tool to double-check compatibility with your specific Tacoma configuration.
- Exact OE replacement
- Covers multiple trims
- Experienced brand support
- Only fits 4.0L engines
- Verify fitment carefully
A-Premium Smog Pump – Chevy and GMC Trucks
This A-Premium pump is tailored for Chevy and GMC trucks and vans from the early 2000s, including models like the Blazer, Express, and Savana. It covers V6 and V8 engines, with reference numbers like 323503M and AIP1. The mixed plastic and aluminum construction offers a balance of weight and durability, and the blade-type terminals ensure a secure electrical connection.
With four hose connectors, it matches the factory setup on many GM vehicles, making installation a breeze. Whether you’re fixing a failed smog pump on a work van or a personal truck, this unit delivers the airflow needed to keep emissions in check. Confirm your engine size and year to ensure a perfect fit.
- Fits multiple GM models
- Durable plastic-aluminum mix
- Easy plug-and-play install
- Limited to early 2000s
- No OEM branding
BIGREAT CP4 to CP3 Conversion Kit – Duramax
Brand: BIGREAT
A must-have upgrade for Duramax owners seeking dependable fuel delivery.
This BIGREAT kit is a game-changer for 2011-2016 Chevy Silverado and GMC Sierra HD trucks with the 6.6L Duramax diesel. It converts your factory CP4 pump to the more reliable CP3, eliminating the notorious CP4 failure issues. The kit includes all necessary components, built from high-quality materials that resist corrosion and oxidation, ensuring long-term durability.
By upgrading to CP3, you boost fueling capacity and overall reliability, which is crucial for heavy-duty use or towing. The installation is involved, but the payoff is significant—peace of mind and better performance. If you’re tired of worrying about CP4 failures, this conversion kit is a worthwhile investment.
- Eliminates CP4 failure risk
- Improves fueling capacity
- Corrosion-resistant materials
- Complex installation
- Requires mechanical skill
A-Premium 2-Pack Smog Pumps – Lexus and Toyota
This A-Premium set includes two secondary air injection pumps, ideal for Lexus LX570 and Toyota Land Cruiser models from 2013-2021, as well as Sequoia from 2011. The reference number 176100S030 matches OE parts, and the plastic-aluminum construction handles high temps and vibration. Each pump features a female connector with blade terminals for a secure fit.
Having two pumps ensures you can replace both sides if needed, which is common on these V8 engines. The package includes one pump, but you can order two sets for a complete swap. It’s a cost-effective way to restore emissions performance and avoid check-engine lights.
- Two pumps for dual replacement
- High-temp endurance
- OE reference match
- Only one pump per package
- Limited to specific models
Bosch OE Secondary Air Injection Pump – Mercedes
Brand: Bosch
The ultimate smog pump for Mercedes owners seeking factory reliability.
Bosch’s Original Equipment pump is the same unit supplied to automakers, ensuring perfect fit and function for Mercedes models like the C230 and GL550. It replaces OE numbers 0001404685 and 0001405185, and the exact OE design means no surprises during installation. Bosch’s decades of experience in OE supply guarantee innovative technology and reliability.
If you want the best possible quality and don’t mind paying a premium, this is the gold standard. It restores your vehicle’s performance and emissions compliance without compromise. For Mercedes owners who value OEM authenticity, this pump is the top choice.
- True OE quality
- Exact fit and function
- Proven Bosch technology
- Higher price point
- Limited to Mercedes fitment
SZKAIDAG Smog Pump – Toyota Tacoma 2.7L
This SZKAIDAG pump is designed for Toyota Tacoma 2.7L four-cylinder models from 2005 to 2015, replacing OE numbers 17610-0C020 and 176000C020. It’s a direct fit, with strict quality control throughout production to ensure reliability. The pump’s construction is robust, handling the demands of daily driving.
Installation is straightforward, and the pump connects to the existing wiring and hoses without modification. The brand emphasizes quality checks at every step, giving you confidence in the product. Just verify your Tacoma’s year and engine to avoid mismatches.
- Strict quality control
- Direct OE replacement
- Broad year coverage
- Only fits 2.7L engines
- No OEM branding
YZHIDIANF Smog Pump – Mercedes and Chrysler
This YZHIDIANF pump fits a range of Mercedes-Benz models like C320, E320, and ML500, plus the Chrysler Crossfire from 2004-2008. It replaces OE numbers such as 05098830AA and 0001403785, offering broad compatibility. The upgraded design aims to improve airflow and longevity over the original.
Installation is simple, with the pump mounting in the stock location. The brand’s 30 years of experience and dedicated after-sales team provide extra assurance. Use the Amazon Confirmed Fit tool to ensure your specific model is covered.
- Covers multiple brands
- Matches several OE numbers
- Upgraded airflow design
- Fitment varies by model
- Check compatibility first
SZKAIDAG 2-Pack Smog Pumps – Toyota and Lexus
Brand: SZKAIDAG
A cost-effective dual smog pump solution for Toyota and Lexus owners.
This SZKAIDAG set includes two secondary air injection pumps, fitting Toyota Tundra (2007-2013), Sequoia (2008-2012), Land Cruiser (2008-2013), and Lexus LX570 (2008-2013). It replaces OE numbers 17610-0S010 and 33-2504M, covering 4.0L to 5.7L engines. The dual-pack is perfect for replacing both pumps, which often fail together.
The pumps are built to OEM specifications, with strict quality control ensuring reliability. Installation is straightforward, and the package includes two pumps, saving you time and money. Verify your vehicle’s engine size and year to confirm fitment.
- Two pumps included
- Broad Toyota/Lexus fitment
- Quality-controlled build
- Only fits specific years
- Check engine size
YZHIDIANF Smog Pump – Chevy Colorado and GMC Canyon
Brand: YZHIDIANF
A reliable smog pump upgrade for GM mid-size trucks and SUVs.
This YZHIDIANF pump is designed for Chevy Colorado (2007-2012), GMC Canyon (2007-2012), Hummer H3, and Isuzu i-290/i-370. It replaces OE numbers 12610063 and 15103159, covering 2.9L and 5.3L engines. The pump undergoes strict quality control, ensuring consistent performance.
Installation is simple, with the pump fitting into the factory location. The brand’s 30 years of experience and responsive after-sales support add value. Use the Amazon Confirmed Fit tool to verify your specific model and engine.
- Multiple vehicle fitment
- Strict quality control
- OE number match
- Limited to certain engines
- Verify fitment before purchase
Buyer’s Guide: What to Consider
Choosing the right injection pump upgrade involves several key factors. This guide highlights the essentials to help you make an informed decision, from fitment to build quality.
- Vehicle Fitment: Always check the exact make, model, year, and engine size. Use the Amazon Confirmed Fit tool or match OE numbers to ensure the pump or kit is compatible with your vehicle.
- OE Reference Numbers: Compare the product's reference numbers with your original part. Matching OE numbers like 17610-0W020 or 0001404685 guarantees a direct replacement and avoids fitment issues.
- Material and Build Quality: Look for pumps made from durable plastic or aluminum. These materials resist heat and corrosion, ensuring long-term reliability. For conversion kits, high-quality steel components are crucial.
- Connector and Terminal Type: Ensure the pump's connector gender and terminal type (pin or blade) match your vehicle's wiring. A mismatch can cause electrical issues or require additional adapters.
- Brand Reputation and Support: Consider brands with proven experience and responsive after-sales support. OEM options like Bosch offer guaranteed quality, while aftermarket brands may provide better value with similar performance.
Conclusion
Upgrading your injection pump can significantly improve your vehicle’s reliability and performance, whether you’re replacing a worn smog pump or converting a CP4 to a CP3. The products reviewed here cover a wide range of vehicles, from Mercedes and Toyota to Chevy and GMC, ensuring there’s an option for most drivers.
For OEM-grade quality, the Bosch pump is unbeatable, while the BIGREAT CP3 conversion kit is essential for Duramax owners. For budget-conscious buyers, A-Premium and YZHIDIANF offer reliable alternatives. Always verify fitment and OE numbers before purchasing to ensure a smooth installation.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
With a passion for exploring the great outdoors and staying up to date on the latest fashion trends, Erica uses her expertise to provide valuable insights into the products that matter most to her readers.
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