TEMSA Cummins ISB 6.7L DEF Head Unit
TEMSA CUMMINS ISB 6.7L DEF HEAD UNIT
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-11-15 ( OEM Part Number RP169196 ). This part is primarily made for a Cummins ISB 6.7L, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 11"
OEM NUMBERS
| Primary OEM | RP169196 |
| Additional OEM | RP169181, RP169192, RP169196, TMS00196-H |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540149 |
| WEIGHT | 8.00 LBS |
SHIPPING OPTIONS
Ship Weight : 8.00 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.
The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.
The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.
All fluids must be drained.
If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.
Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.
Efficient DEF system management is delivered by the TEMSA Cummins ISB 6.7L DEF Head Unit: OEM RP169196, a direct-fit replacement for compatible TEMSA vehicles. Built to OEM specifications, this unit monitors diesel exhaust fluid level, temperature, and quality to maintain reliable aftertreatment performance and emissions compliance. Its durable construction provides consistent operation under demanding conditions, helping protect both the exhaust system and overall engine efficiency. Choosing an OEM DEF head unit reduces compatibility risks and promotes dependable long-term service. This component is a proven solution for keeping TEMSA Cummins-powered buses operating smoothly and within emissions standards.
PEOPLE ALSO ASKS | BLOG(S)
The DEF Head Unit with part number RP169196 is a key emissions component used in TEMSA vehicles that are powered by Cummins ISB 6.7L engines. It is a “head” or “header” module mounted on the DEF (Diesel Exhaust Fluid) tank. In many cases, these units are remanufactured and come with warranty coverage (for example, one million miles or one year).
- Monitors the level of DEF fluid in the tank, sending this data to the engine’s control system so you know when to refill.
- Measures DEF fluid temperature, which is important because the fluid can freeze or become less effective at very low temperatures.
- Filters the fluid through an internal screen (commonly around 40 microns) to remove particles and protect downstream components.
- Manages fluid routing: includes suction and return lines so the DEF flows correctly between the tank and the dosing or injection system.
A functioning DEF head unit like RP169196 ensures your emissions system works as intended. Without it, you could face warning signals, reduced engine power (derate), or even fail compliance checks. Keeping this component in good condition helps maintain the health and efficiency of your DEF system, reduces downtime, and supports cleaner operation.
The DEF (Diesel Exhaust Fluid) head unit plays a vital role in monitoring the level, quality, and temperature of DEF inside the tank. If this unit fails, it can send incorrect signals to the vehicle’s emissions system—and that can cause more than just dashboard warnings.
Risks of Driving With a Faulty DEF Head Unit
While your vehicle may continue running for a short time, driving with a bad DEF head unit comes with serious risks:
- False low DEF warnings
- The system may think the tank is empty, even when it's full
- Unexpected derate mode
- The vehicle may limit speed or throttle response to protect the emissions system
- Check engine or emission lights
- May stay on continuously, masking other issues
- Failed inspections
- Inaccurate readings can lead to emissions test failure
- Overconsumption of DEF
- The system may use more fluid than needed based on incorrect readings
It is not recommended to drive long distances with a failing DEF head unit. Even if the engine seems fine, the system may enter a protective mode without warning. Immediate inspection and replacement are the safest route.
It monitors DEF tank level, temperature, and quality in Cummins ISB 6.7L engines.
Warning lights, inaccurate DEF readings, or engine derates often point to failure.
It ensures DEF quality is properly monitored to keep the SCR system operating efficiently.
Yes, a failed unit can cause derates, reduced performance, or failed emissions tests.
Cummins DEF Head Units
