Volvo Mack D13, MP8 DEF Doser Injector 2018-2022: OEM 22744063/ 22744065
VOLVO MACK D13, MP8 DEF DOSER INJECTOR 2018-2022: OEM 22744063/ 22744065
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx DEF Doser Injector, Tamerx part number 22744065TX ( OEM Part Number 22744063/ 22744065 ).This part is primarily made for a Volvo Mack D13, MP8, production years 2018-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 22744063/ 22744065 |
| Additional OEM | 22744063/ 22744065 |
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 deliver precise dosing of DEF fluid into the exhaust stream, the OEM 22744063 / 22744065 DEF Doser Injector fits Volvo D13 and Mack MP8 engines produced from 2018 to 2022. This injector helps support proper aftertreatment function by ensuring accurate DEF atomization, aiding in effective emissions reduction. Its OEM-grade construction provides correct fitment, dependable spray performance, and resilience against heat, crystallization, and vibration. When symptoms such as dosing faults, crystallized buildup, or related diagnostic codes arise, this component offers a reliable replacement option. Manufactured with durable materials and precise engineering, it supports steady aftertreatment operation across all compatible D13 and MP8 applications in this model range.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2018 | Volvo Mack | D13 | MP8 | |||
| 2019 | Volvo Mack | D13 | MP8 | |||
| 2020 | Volvo Mack | D13 | MP8 | |||
| 2021 | Volvo Mack | D13 | MP8 | |||
| 2022 | Volvo Mack | D13 | MP8 | |||
PEOPLE ALSO ASKS | BLOG(S)
The DEF doser injector on Volvo D13 and Mack MP8 engines plays an essential role in the emissions system by spraying Diesel Exhaust Fluid into the aftertreatment system. Keeping this injector clean and functioning properly helps prevent derates, fault codes, and costly downtime.
Why Maintenance Matters
Over time, crystallized DEF, soot buildup, or restricted flow can prevent the injector from delivering the correct amount of fluid. Regular maintenance ensures accurate dosing, protects the SCR system, and keeps the engine running efficiently and within emissions standards.
Key Maintenance Steps
- Inspect for Crystallization
- DEF can crystalize around the tip of the injector. Check for white or chalky buildup and clean it gently with approved DEF-safe cleaning solutions.
- Check for Clogged Passages
- Restricted injector passages can lead to improper dosing. If buildup is visible, clean the injector tip and surrounding area carefully.
- Examine Electrical Connections
- Ensure the harness connection is clean, tight, and free from corrosion. A weak electrical signal can cause injector misfires or incorrect dosing rates.
- Monitor DEF Quality
- Using contaminated or expired DEF can damage the injector. Always use fresh DEF from a sealed container and avoid introducing debris into the tank.
- Perform Regular System Regeneration
- A properly functioning aftertreatment system helps keep the doser injector from accumulating excessive soot. Follow manufacturer-recommended regen practices.
- Replace When Necessary
- If the injector becomes severely clogged, leaks, or fails electrically, replacement with OEM 22744063 or 22744065 ensures proper fitment and system reliability.
Consistent maintenance of the DEF doser injector helps prevent costly repairs, keeps your emissions system healthy, and supports smooth, dependable operation of Volvo D13 and Mack MP8 engines. A little preventive care goes a long way in avoiding derates, downtime, and unnecessary stress on the aftertreatment system.
A DEF doser injector is responsible for spraying Diesel Exhaust Fluid into the exhaust stream, allowing the SCR system to reduce emissions correctly. When the injector begins to fail, you may notice warning lights, reduced efficiency, or fault codes related to the emissions system. Diagnosing the problem early helps prevent further issues.
Common signs of a faulty DEF doser injector include:
- DEF crystallization around the injector tip
- Frequent DEF system warnings on the dash
- Inconsistent dosing rates recorded in diagnostics
- Higher DEF consumption without explanation
Steps to diagnose a failing DEF doser injector:
- Scan for fault codes using diagnostic software. Look for codes related to DEF dosing, pressure, or flow rate.
- Inspect the injector externally for crystallized DEF buildup, corrosion, or physical damage.
- Check supply lines to ensure proper fluid flow and no blockages.
- Run an injector test using a diagnostic tool to measure dosing output.
- Verify exhaust temperatures, as incorrect temperatures can cause dosing errors that mimic injector failure.
If the injector shows inconsistent spray patterns, restricted flow, or fails diagnostic tests, replacement is usually required to restore proper DEF delivery and maintain emissions compliance.
It delivers a precise spray of DEF into the exhaust stream to support proper SCR operation.
You may notice poor dosing efficiency, SCR-related fault codes, or unexpected derates.
It ensures the correct amount of DEF is atomized so NOx reduction occurs effectively in the SCR catalyst.
Yes, buildup can block the nozzle and limit DEF flow.
