Stop Using Cheap Vacuum Caps – Upgrade to Genuine Toyota Vacuum Caps That Will Last a Lifetime
- Shop Yota

- Jul 16
- 4 min read

When it comes to maintaining your Toyota, the smallest components can make the biggest difference. One area where many vehicle owners cut corners is in vacuum cap replacements. While aftermarket vacuum caps may seem like a cost-effective solution, they often fail after just a few months, leading to unwanted vacuum leaks and frustration. The long-lasting solution? Genuine Toyota vacuum caps.
In this article, we’ll explain why you should stop using cheap vacuum caps and make the switch to Toyota’s OEM vacuum caps, which are built to last. We’ll also provide a detailed list of part numbers and sizes to ensure you choose the right cap for your Toyota.
Why Choose Genuine Toyota Vacuum Caps?

It’s easy to assume that any vacuum cap will do the job, but cheap, aftermarket options are typically made from inferior materials that are prone to cracking, breaking, and leaking. While these caps may work temporarily, they’ll need to be replaced repeatedly, costing you both time and money.
Toyota’s OEM vacuum caps, on the other hand, are engineered with durability in mind. Designed to withstand heat, pressure, and the chemicals found in the engine bay, they ensure a tight seal and a long-lasting solution for your vehicle's vacuum ports. Unlike cheap, generic caps, Toyota parts are specifically made to fit your car, ensuring the perfect seal every time.
By choosing genuine Toyota vacuum caps, you can avoid the hassle of constant replacements and keep your engine running smoothly. Here’s a look at the different Toyota vacuum cap part numbers and their sizes.
Toyota OEM Vacuum Cap Part Numbers and Sizes
Here’s a detailed list of Toyota vacuum caps, including the part numbers, approximate sizes, and the hose barb diameters they fit:
1. 90339-03005
Fits: 3mm Hose Barbs
Application: Small vacuum lines, commonly used on older Toyota models for small vacuum ports.
2. 90339-03002
Fits: 3mm Hose Barbs (Taller Design)
Application: An alternative to the -03005, offering a taller design but generally more expensive. Used for the same small 3mm vacuum lines.
3. 90339-05005
Fits: 5mm Hose Barbs (Approx. 3/16")
Application: Ideal for medium-sized vacuum ports, commonly used in Toyota vehicles from the 1980s and 1990s.
4. 90339-05018
Fits: 5mm Hose Barbs
Application: A more recent alternative to the -05005, used on newer Toyota models for 5mm vacuum ports.
5. 90339-07016
Fits: 8mm Hose Barbs (Approx. 5/16")
Application: Used for larger vacuum ports, often found on Toyota models from the 1990s and 2000s.
6. 90339-07018
Fits: 8mm Hose Barbs
Application: Similar to -07016, used for 8mm vacuum nipples on various Toyota models.
7. 90339-09003 (Superseded by 90339-A0008)
Fits: 10mm Hose Barbs (Approx. 3/8")
Application: Large vacuum ports, often used to cap vacuum hose unions and intake air connector ports.
8. 90339-11002
Fits: 11mm Hose Barbs (Approx. 7/16")
Application: A larger cap used for sealing medium-sized vacuum or compressor ports, commonly found on newer engines.
9. 90339-13004
Fits: 13mm Hose Barbs (Approx. 1/2")
Application: Used for large vacuum or bypass ports, typically found in newer Toyota models with larger fittings.
10. 90339-18001
Fits: 18mm Hose Barbs (Approx. 3/4")
Application: Extra-large cap, used to seal very large vacuum ports, often found on turbocharged engines or larger intake systems.
Superceded Part Numbers
Some Toyota part numbers for vacuum caps may have been superceded over time. For example, 90339-09003 has been replaced by 90339-A0008, but it is still the same size and serves the same function. Don’t worry—when Toyota updates a part number, the new one will still offer the same fit and reliability.
Why You Should Stop Using Cheap Vacuum Caps

You may be tempted to go with aftermarket vacuum caps to save a few dollars, but they’re often made with lower-quality materials that break down quickly. These caps may crack or become brittle after just a few months, leading to leaks, poor engine performance, and the constant need for replacement.
In addition to wasting your time and money, using inferior vacuum caps can cause vacuum leaks, which affect your vehicle’s fuel economy, emissions, and overall engine performance. Toyota’s genuine vacuum caps ensure a tight seal that lasts for years, so you won’t have to worry about these issues.
Benefits of Genuine Toyota Vacuum Caps:
Durability: Made from high-quality rubber or silicone to withstand engine temperatures and harsh conditions.
Perfect Fit: Designed specifically for your Toyota, providing an airtight seal that generic caps can’t match.
Long-lasting Performance: With Toyota’s OEM vacuum caps, you’ll never have to replace them again.
Prevents Leaks: Prevents vacuum leaks that can lead to poor engine performance and decreased fuel efficiency.
Conclusion
When it comes to maintaining your Toyota, don’t settle for cheap, unreliable vacuum caps. Invest in genuine Toyota OEM vacuum caps and seal off unused vacuum ports with confidence. These caps are designed for longevity and durability, ensuring a perfect fit for your Toyota and helping your engine run at peak performance.
Stop wasting money on replacements—choose Toyota vacuum caps that will last a lifetime. Shop now and get the right vacuum caps for your vehicle today!

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