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Dorman 904-5401 Heavy Duty Diesel Exhaust Fluid DEF Cap

(2004-2005 Mazda Miata LS/Mazdaspeed; 1999-2003 Mazda Protege; 2000-2001 Mazda MPV ES/LX)

Part of: Dorman Heavy Duty Diesel Exhaust Fluid DEF Cap

Other options in this family: Dorman 904-5301

Manufacturer

Part Number

904-5401
Sale Price

$17.93

In Stock (10+)

delivery box

Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman 904-5401 is a direct replacement diesel exhaust fluid (DEF) cap designed for heavy duty diesel applications. This cap provides a secure seal for the DEF tank, preventing contamination and evaporation of the exhaust fluid while ensuring proper emissions system operation.

Key Features:

  • Direct replacement for worn or damaged OE DEF caps
  • Heavy duty construction for reliable long-term performance
  • Engineered to prevent leaks and maintain proper DEF tank pressure
  • Helps protect DEF fluid from contamination and degradation
  • Designed for easy installation with no modifications required

Dorman is a trusted supplier of automotive replacement parts, offering this DEF cap as a cost-effective alternative to dealer parts. Regular inspection and replacement of the DEF cap helps maintain proper diesel emissions system function and prevents check engine lights related to DEF system leaks.

Products specifications

Fits

2004-2005 Mazda Miata LS/Mazdaspeed; 1999-2003 Mazda Protege; 2000-2001 Mazda MPV ES/LX

Feature - Benefit 1

A necessary replacement item for passing inspection in certain states

Feature - Benefit 2

Constructed from high- quality, heat-resistant materials for a long service life

Feature - Benefit 3

Direct replacement for a proper fit

Feature - Benefit 4

Vehicle try-on testing and vibration testing have been conducted on this part to ensure trouble-free performance

Package Contents

Retention Ring

Color

Blue

Material

Plastic

Universal Or Specific Fit

Specific

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Ordered Friday and received the shipment Tuesday. Excellent price. The product was exactly as ordered and arrived in good condition. The checkout process at autoplicity.com is incompatible with nonmainstream browsers. No joy even with java, javascript, referrer logging and cookies all enabled. Finally I placed the order over the phone. Ten minutes later I received acknowledgments for two identical orders, 8961 and 8965. I phoned and asked them to cancel one of the duplicate orders. Four hours later I receive an e-mail saying my order 8961 was canceled for one of four possible reasons, none of which was "We canceled your order that was accidentally duplicated." So I had to phone again (phone is more effective with autoplicity than e-mail or chat) to see whether they had canceled one or both orders. The excellent price was offset by the communication hassle. If you prefer not to use IE or Thunderbird or Chrome, then skip the checkout hassle by placing your order by phone.

Excellent service with the actual stock on hand, shipment was made the next day and a tracking number was provided. I have tried 2 other online supply stores which don't know what they have in stock.

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