If you want a cap with precise, documented dimensions that match your OEM part number exactly without guessing, choose DeFageH 2Pcs; if you need a broader compatibility list that covers older and newer model years across more Nissan and Infiniti platforms, choose WZP 2PCS. This isn't about which brand is louder or cheaper, but about which specific engineering fit serves your vehicle's cooling system best, especially when you are prepping for winter driving where a failing seal can turn a cold morning into a stranded nightmare.
• DeFageH 2Pcs: Its biggest strength is the granular dimension accuracy (1.46" x 1.46" outer) tailored to the 2003–2019 Nissan/Infiniti lineup; its trade-off is a slightly narrower range of listed compatible models compared to the competitor.
• WZP 2PCS: Its biggest strength is an extensive compatibility list covering everything from the Altima to the QX70 with multiple OEM replacement numbers; its trade-off is a marginally larger height profile (0.43" vs 0.4") which might matter for tight clearance spots.
• Who it's for: DeFageH fits the precision-minded owner who wants exact spec matching for their specific model year, while WZP appeals to the versatile buyer looking for a broad "one cap fits many" solution.
The DeFageH coolant reservoir cap is built for the driver who values exact specifications over general breadth. What stands out immediately is the emphasis on premium heat-resistant plastic designed to withstand high temperatures without deforming. In my view, this focus on material durability suggests a design priority on long-term reliability under stress, which is critical when your engine is working hard in freezing conditions.
The physical dimensions are the real differentiator here. With an outer diameter of exactly 1.46 inches and an inner diameter of 1.18 inches, this cap is engineered to match the OEM part number 21712-79900 with surgical precision. If you have a vehicle that requires these exact measurements, the DeFageH option removes the anxiety of buying a generic part that might not seat correctly. The height is listed at 0.4 inches, making it a low-profile unit that likely sits flush within the reservoir housing.
This product is ideal for the DIY mechanic who keeps a spare in the glove box specifically for their Nissan Pathfinder or Infiniti G35. The packaging includes two units, which is practical for having one installed and one ready as a backup. However, if your car falls outside the specific years listed—like a newer Altima or an older Juke not mentioned in the detailed breakdown—you might find the compatibility list too restrictive. It is a tool for those who know their part number and want a direct, verified replacement rather than a guesswork solution.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-07 · 6 min read · Independent comparison
The WZP 2PCS kit takes a different approach, prioritizing versatility and broad coverage. Instead of focusing solely on a single part number, it lists multiple OEM replacements including 21712-79900, 21712ZN50A, and AM-4118851190. This suggests the cap is designed to be a universal substitute for a wide array of wear-and-tear scenarios across the Nissan and Infiniti ecosystem. You get a list that stretches from the 2003 Maxima all the way to the 2019 Altima, plus a host of Infiniti models like the EX37 and FX37. If you own a fleet of cars or work on various models, this breadth is its primary asset.
Material-wise, WZP also leans into "premium quality" heat-resistant plastic, promising to prevent cracking and maintain stable pressure. The sealing mechanism is described as ensuring no coolant leaks during daily driving, which is the core function regardless of the brand. The dimensions here are slightly different: an outer diameter of 1.5 inches and a height of 0.43 inches. While these differences seem minor on paper, they represent a distinct physical profile. The extra 0.03 inches in height could provide a bit more leverage for removal or installation, but it also means it might sit slightly higher in the reservoir neck compared to the DeFageH unit.
I see the WZP option as the choice for the owner who needs a reliable spare part without obsessing over the third decimal place of a measurement. It is perfect for someone who has lost their original part number but knows their car is a Nissan Pathfinder or Infiniti G37. The inclusion of two black caps in a compact package makes it easy to stash away. However, if your vehicle relies on the tighter tolerance of the 1.46-inch diameter, the 1.5-inch spec of WZP might require careful verification before purchase. It is a robust, general-purpose solution that casts a wide net.
• Best for Exact Fit Dimensions → DeFageH 2Pcs (Specifically cites 1.46" x 1.46" outer diameter for OEM 21712-79900).
• Best for Model Year Breadth → WZP 2PCS (Covers Altima 2013-2019 and a wider spread of older Infiniti models).
• Best for Multiple OEM References → WZP 2PCS (Lists four alternative part numbers beyond the standard 21712-79900).
• Best for Low Profile Installation → DeFageH 2Pcs (0.4" height vs 0.43" for WZP).
• Best for Heavy Duty Heat Resistance → Both (Both explicitly claim premium heat-resistant plastic to prevent deformation).
• Best for Immediate Spare Needs → Both (Both come in 2-packs suitable for keeping in a toolbox).
• Best for Specific Model Years (2008-2020) → DeFageH 2Pcs (More detailed breakdown for Rogue and Sentra years).
• Best for General Replacement → WZP 2PCS (Broader "compatible with most" statement for quick identification).
After weighing the specs, I would buy the DeFageH 2Pcs for my own garage. The reason is simple: in the world of automotive parts, precision is king. The fact that DeFageH provides such specific dimensional data (1.46" outer diameter) gives me confidence that the seal will hold perfectly against the factory port. When you are dealing with a cooling system failure in the middle of winter driving, you don't want to worry about whether a 0.03-inch difference in height or width will cause a leak. The DeFageH cap feels engineered for a specific purpose rather than a generic fit. While WZP is a solid contender with its wide compatibility, the DeFageH option offers the peace of mind that comes with exact specification matching.
Based on the data, both use heat-resistant plastic to prevent deformation, but DeFageH's specific 1.46" diameter matches the OEM spec tightly, which theoretically ensures a more consistent seal in freezing temperatures where materials contract.
Yes, the WZP data sheet explicitly lists compatibility with the Nissan Altima 2013-2019, making it a viable direct replacement for your vehicle's cooling system.
No, both products come in 2-piece packs. Unless you have two vehicles needing immediate attention, buying one pack of either brand provides enough spares for routine maintenance and emergency backups.
The DeFageH 2Pcs is shorter at 0.4 inches tall, whereas the WZP 2PCS measures 0.43 inches. If you have limited vertical clearance in your coolant neck, the DeFageH unit is the thinner option.
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