DEF Cap : OEM ASP-DC-0101
DEF CAP : OEM ASP-DC-0101
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, DuraWRX DEF Cap, DuraWRX part number ASP-DC-0101 ( OEM Part Number ASP-DC-0101 ). This part is primarily made for a , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Cap, Non-Locking, No Lanyard
OEM NUMBERS
| Primary OEM | ASP-DC-0101 |
| Additional OEM | 712457, 10011118, 2153-LL2-801001, ASP-DC-0101, GS247549 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | |
| WEIGHT | 1.00 LBS |
SHIPPING OPTIONS
Ship Weight : 1.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.
The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.
Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.
Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".
If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.
As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.
What is a Core Charge?
A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.
30 Day Core Charge Hold
You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.
"This Product Doesn't Have a Core"
Designed to provide a secure seal for the DEF tank opening, the OEM ASP-DC-0101 DEF Cap helps protect the fluid from contamination and evaporation. This cap maintains a clean and closed environment, supporting proper system function by preventing dirt, moisture, and debris from entering the DEF reservoir. Its OEM-grade construction ensures accurate fitment, dependable sealing performance, and durability under frequent use. When signs such as a loose fit, damaged threads, or fluid residue around the tank opening appear, this cap offers a reliable replacement option. Built with sturdy materials and precise engineering, it supports consistent DEF system integrity across all compatible applications.
PEOPLE ALSO ASKS | BLOG(S)
The DEF Cap (OEM ASP-DC-0101) is a small but essential part of the Diesel Exhaust Fluid system. Its job is to seal the DEF tank, protect the fluid from contamination, and maintain proper tank pressure. To do this reliably, the cap is built from several key components that ensure durability and leak-free performance.
Key Components of the DEF Cap
- Outer Cap Housing
- A rugged plastic shell designed to resist DEF corrosion, extreme temperatures, and day-to-day handling. This is the part you grip when opening or closing the tank.
- Internal Seal or O-Ring
- A soft, chemical-resistant sealing ring ensures the cap closes tightly against the filler neck. This prevents leaks, contamination, and moisture from entering the DEF tank.
- Threaded Locking System
- Molded threads allow the cap to screw securely into the tank opening. The design prevents loosening from vibration and ensures consistent sealing pressure.
- Vent or Pressure Relief Feature (if equipped)
- Some DEF caps include a micro-vent or relief mechanism to help regulate tank pressure and allow air movement without letting contaminants in.
- Grip Surface / Raised Tabs
- Textured or raised sections make the cap easy to turn, even when wearing gloves or working in cold conditions.
- Tether Attachment Point (if included)
- A built-in loop or slot allows a retention tether to attach the cap to the tank so it cannot be misplaced during refilling.
Why These Components Matter
Together, these parts ensure the DEF tank stays sealed, clean, and safe from debris. A well-designed DEF cap protects the SCR system by keeping DEF pure, preventing crystallization around the filler neck, and maintaining proper tank pressure for accurate DEF pumping and dosing.
A DEF cap may seem like a minor part, but it plays an important role in sealing the Diesel Exhaust Fluid tank and protecting the entire emissions system. When the cap is damaged, missing, or not sealing correctly, contaminants such as dust, moisture, and debris can enter the DEF tank and affect system reliability.
Driving with a faulty DEF cap is possible, but not recommended. Even short trips can introduce contamination that leads to costly repairs later.
Risks of driving with a faulty DEF cap include:
- Contaminated DEF fluid, which can damage sensors and the pump
- Crystallized buildup around the tank opening
- Warning lights or fault codes tied to DEF quality
- Restricted DEF flow that may trigger derate
- Moisture intrusion, which degrades DEF purity
Because the DEF system depends on clean, stable fluid, even small amounts of contamination can cause major issues. A faulty cap may also allow DEF vapors to escape, leading to residue buildup that affects nearby components.
If your DEF cap is cracked, missing, or no longer sealing properly, replace it as soon as possible. A proper seal keeps the DEF system clean, prevents unnecessary faults, and helps your emissions system operate correctly.
Yes, contamination from an unsealed tank can clog filters and interfere with dosing accuracy.
It typically uses standardized color and labeling to distinguish it from fuel caps.
An incorrect cap may not seal properly, leading to contamination or venting problems.
They match the part number and verify the cap’s threading and fitment specifications with the DEF tank design.