LiftMaster K74-19499 Antenna and Coaxial Cable Kit
The LiftMaster K74-19499 antenna and coaxial cable kit is used to restore the external radio antenna connection on compatible LiftMaster gate operator applications. A damaged antenna, broken coax connector, corroded cable, or missing antenna can reduce remote-control range and make the gate appear to have a receiver problem when the receiver itself is still working.
This kit is most commonly associated with LiftMaster LA400 series swing gate operators. The LA400 family is a 24VDC residential/light-duty swing gate actuator platform, and the antenna supports radio communication between compatible remote controls, receivers, and the operator control system. This part should not be confused with a radio receiver board or a universal external antenna for every LiftMaster gate operator.
The row in this CSV needs careful stock review because it shows K74-19498 in the id/mfgid fields while the visible name and current common references point to K74-19499. I wrote the customer-facing content around K74-19499 because that is the antenna-and-coax kit description found in multiple current parts references, but the warehouse label should be checked before import or sale.
Where This Part Is Commonly Used
Use this antenna kit when a compatible LA400 operator has poor remote range and the existing antenna/coax assembly is damaged, missing, or suspect. It will not fix programming problems, incompatible remotes, dead remote batteries, receiver board failure, or radio interference by itself.
Antenna routing and connector condition matter. A new antenna should be installed in a way that avoids pinched cable, damaged shielding, and water intrusion into the control box.
Compatible With
Known and commonly referenced compatibility found during review includes:
- LiftMaster LA400 series swing gate operators
- LiftMaster LA400UL 24VDC residential linear actuator gate operator applications where this antenna kit is listed
- LA400 swing gate control boxes using the matching antenna and coaxial cable connection
- Replacement for damaged or missing LA400 receiver antenna/coax assemblies
- Not a universal receiver, not a logic board, and not automatically compatible with every LiftMaster gate operator family
Features and Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Antenna and coaxial cable kit |
| Primary Part Number | K74-19499 |
| Uploaded Row Reference | K74-19498 appears in id/mfgid and should be reviewed |
| Application | Radio antenna replacement |
| Compatible Operator Type | Select LA400 series swing gate operators |
| Function | Supports remote-control signal reception by replacing the antenna/coax assembly |
| Notes | Confirm stock label before uploading because the row has K74-19498/K74-19499 mismatch |
Also Known As / Related Part Numbers
The following numbers and descriptions are commonly associated with this antenna listing:
- K74-19499
- 74-19499
- LIF-K74-19499
- Antenna with coaxial cable
- Antenna and coaxial cable replacement kit
- LA400 antenna kit
- K74-19498 - uploaded row reference requiring review
Technician Note
Poor remote range is not always an antenna problem. Check remote batteries, correct remote technology, receiver programming, antenna connection, cable damage, nearby interference, and control-box water intrusion before replacing parts.
Before Ordering
- Confirm the physical package or label shows K74-19499 if selling this as the antenna and coax kit.
- Confirm the operator is an LA400 series swing gate operator or a parts diagram lists this antenna kit.
- Inspect the existing antenna connector and coax for corrosion, broken shielding, or water entry.
- Confirm the remote and receiver technology are compatible and properly programmed.
- Do not substitute this kit for a receiver board or universal external antenna unless the operator diagram supports it.
Professional Advisory
Gate operator radio work is low-voltage, but the control box may also contain battery and line-voltage circuits. Disconnect power as required by the operator manual and avoid routing antenna cable near moving parts, sharp edges, or unsealed openings.
Product Questions and Answers
Is this antenna kit for the LiftMaster LA400?
Yes. Current references commonly list K74-19499 as an antenna and coaxial cable kit for LiftMaster LA400 series swing gate operators.
Will this antenna fix a remote that will not program?
Not usually. Programming failure is more often caused by incompatible remote technology, a receiver issue, full memory, or a control-board problem. The antenna mainly affects signal range and reception.
Why does the row show K74-19498 and K74-19499?
The uploaded row has K74-19498 in the id/mfgid fields while the product name/title show K74-19499. The stock label should be checked before upload or fulfillment.
Does this include the receiver board?
No. This is an antenna and coaxial cable kit. It is not the radio receiver board or the main control board.
Can this be used on all LiftMaster gate operators?
No. It should be used only on LA400 series applications or another operator parts diagram that specifically calls for the same antenna kit.
