DJI Agras T40 OEM Backward Vision Sensor Radar Module

The DJI Agras T40 OEM Backward Vision Sensor Radar Module is the rear-facing obstacle-sensing unit of the aircraft: the module that looks behind the airframe while the aircraft reverses, backs out of a headland or flies the return leg of a pass tail-first. It is the sensing part of the rear position in the obstacle-sensing system. It sits in the backward vision radar bracket at the rear of the airframe and reports to the aircraft through its own signal lead. The module is identified for the DJI Agras T40 and T20P. Of the three parts at that rear position — the bracket that aims it, the lead that carries its signal, and the module itself — it is the only one that does the sensing, and it is the one to replace when the fault is in the sensing.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras retailer supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres also ships agricultural drone parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras retailer serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

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✅ DJI Agras T40 / DJI Agras T20P Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T40 and T20P, on the rear sensing position
• Matched by position and connector against the module you removed
• Genuine DJI OEM sensing module, brand new

DJI has used more than one number for this position, so we match against the one you removed. Photograph the label on the old module and the module in place on the aircraft, and send it to us if you want the match confirmed before it ships.

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📦 Package Includes

• 1 × Backward Vision Sensor Radar Module (the rear-facing sensing unit)

This is a single sensing module, not a rear-sensing kit. It is the unit that sees behind the aircraft; it does not bring the parts it mounts in or connects through.

Not included: the backward vision radar bracket the module sits in, the radar signal lead, the omnidirectional radar, mounting screws, body shells or covers. Fixings are not listed as supplied — reuse the original screws if they are sound, or replace any that are stripped or corroded.

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🔧 Component Overview

An Agras spray aircraft spends a large part of every job flying in a direction it is not facing. It backs out of headlands, reverses along rows, and on many routes flies the return leg tail-first rather than turning round. Forward sensing cannot see any of that. The backward vision sensor radar module is the part that watches the space behind the aircraft while it moves that way.

The module sits at the rear of the airframe, held in the backward vision radar bracket, and connects to the aircraft through its own signal lead. It is a separate unit from the omnidirectional radar, which is a different module in a different position with a different job. The two are often called "the radar" in conversation, and the confusion between them is the most common way the wrong part gets fitted.

At the rear position, three parts have to be right at once:

• The bracket decides where the module is looking
• The signal lead carries what the module reports back to the aircraft
• The module does the looking

A fault at the rear can live in any of the three, and the symptom the operator sees is usually the same: rear obstacle sensing that cannot be trusted. Only one of those three faults is cured by a new module.

The module lives on the outside of an aircraft that works low, close to crop, wet with spray mix and covered in field dust. What it has to survive in that position:

• Tail-first ground contact on hard or uneven landings
• Strikes from crop canopy, branches, fence wire and posts while reversing
• Spray residue and mud building up on its sensing face
• Pressure washing at the end of each working day
• Knocks during loading onto trailers and truck beds
• Vibration through the frame on every flight
• Water reaching the connector when a seal or cover has been disturbed

Modules in this position are replaced for one reason: the module itself has stopped sensing correctly. Proving that reason takes a few minutes with a cloth, a look from behind and a reseated connector, and it comes before the module comes off the aircraft.

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⚙️ Functional Purpose

The module's engineering role is detection behind the aircraft. It senses obstacles in the space at the rear of the airframe and reports them to the aircraft, so that obstacle avoidance has something to act on when the aircraft is moving backwards.

In the obstacle-sensing system it:

• Senses the space behind the aircraft from the rear of the airframe
• Reports what it detects to the aircraft through its signal lead
• Gives the obstacle-avoidance functions their rear view while the aircraft reverses or flies tail-first
• Works alongside the omnidirectional radar, which covers its own field from its own position

Its performance figures — detection range, field of view, operating frequency — are not published for this part, and none are stated here. What can be said is what its position and name support: it is the sensor responsible for the rear, and nothing else on the aircraft takes over that job if it stops working.

What the module does not do matters as much as what it does:

• It does not aim itself — the backward vision radar bracket sets the direction it looks, and a bent bracket aims a healthy module at the wrong space
• It does not carry its own signal — the lead does, and a chafed or loose lead makes a healthy module look faulty
• It does not replace or repair the omnidirectional radar, which is a separate module with its own position
• It does not change obstacle-avoidance settings on the remote controller; it supplies the rear view those settings act on
• It does not clean itself — a dirty sensing face blinds a module that has nothing wrong with it

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🔍 Diagnosis — the bracket aims it, the lead carries it, only the module sees

A rear-sensing problem has four possible owners: the sensing face, the bracket, the lead and the module. Three of them are cheap to check and one is the module itself. Work through them in that order, because the module is the only one that has to come off the aircraft and the only one whose replacement changes nothing if the fault was elsewhere.

Owner 1 — the sensing face. Spray residue, mud or a film of water on the module's face produces false rear warnings or missing ones from a module that is working perfectly. Clean it gently with a soft damp cloth, dry it and test again. A fault that disappears when the face is clean was never a module fault.

Owner 2 — the bracket. The module reports what is in front of its face. If the bracket under it has been bent by a tail-first landing or a rear strike, the module is still sensing accurately — at the wrong piece of space. Look at the module from behind and from the side: it should sit square to the airframe. A tilted or skewed module on a tight bracket is a bracket problem, and the part to fit is the DJI Agras T40 OEM Backward Vision Radar Bracket, not a new module.

Owner 3 — the lead and connector. A loose, chafed, corroded or water-damaged connection produces dropouts, warnings that come and go, and faults that change when the aircraft is flexed or the lead is moved. Reseat the connector, inspect the run for chafe, and look for corrosion on the pins. A fault that changes when the lead is touched is a lead fault.

Owner 4 — the module. When the face is clean, the module sits square, the connection is sound and the aircraft still reports a fault for the rear sensing position — or rear sensing is plainly absent while the forward sensing works — the fault is in the module.

What a failed module tends to look like in the field:

• A fault reported against the rear sensing position that survives cleaning, reseating and a power cycle
• No rear obstacle response at all, while forward sensing behaves normally
• Rear warnings that are wrong in a consistent way rather than intermittently, with a clean face and a square module
• Visible damage to the module body or its sensing face after a strike — a crack, a chip or a breach
• Signs that water has been inside the module after washing or a heavy-rain job

What points away from the module:

• Faults in every direction of travel, not only when reversing — look at the omnidirectional radar and the aircraft's wider sensing first
• A warning that comes and goes when the aircraft is moved or the lead is flexed — the lead or connector
• A module that is visibly tilted or skewed — the bracket
• Problems that clear when the face is cleaned — nothing needs replacing

Run that list in order, first, while those checks still cost nothing. A new module behind a bent bracket points the same wrong way, and a new module on a damaged lead reports the same dropout.

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⚠️ Common Replacement Indicators

Replace the module when inspection confirms one of these:

• A persistent fault reported against the rear sensing position, with a clean face, a square module and a sound, reseated connection
• Rear obstacle sensing absent while forward sensing works normally, and the lead checks good
• A cracked, chipped or holed module body or sensing face
• Evidence of water inside the module
• Damage at the module's own connector that cannot be cleaned or reseated
• A fault that follows the module when the lead and bracket have been confirmed sound

Inspect these first, because they produce similar symptoms:

• The module's sensing face — residue, mud, water, scratches
• The backward vision radar bracket — bend, twist, cracks, a flange that rocks
• The rear radar signal lead — chafe, pinch points, loose or corroded connector
• The omnidirectional radar — if the fault is not limited to the rear
• Obstacle-avoidance settings on the remote controller

There is no published service interval for this module. It is replaced when it has failed, not on a schedule.

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📐 Specifications

Product name: DJI Agras T40 OEM Backward Vision Sensor Radar Module

DJI family: Agras

Primary aircraft: DJI Agras T40

Also listed for: DJI Agras T20P

Fitment basis: Identified for the DJI Agras T40 and T20P

Aircraft system: Obstacle sensing — backward (rear-facing) position

Component type: Rear-facing obstacle-sensing module (backward vision sensor radar)

Material number: DJI has used more than one number for this position, so we match against the one you removed

Quantity: 1 module

Mounting position: Rear of the airframe, seated in the backward vision radar bracket

Connection: Through the rear radar signal lead to the aircraft

Detection range: Not published for this part

Field of view: Not published for this part

Operating frequency: Not published for this part

Colour: Not published for this part

Material: Not published for this part

Dimensions: Not published for this part

Weight: Not published for this part

Electrical: Powered and connected through its signal lead; supply figures not published for this part

Bracket included: No — the backward vision radar bracket is a separate part

Signal lead included: No — the radar signal lead is a separate part

Fixings included: No — screws are not listed as supplied

Condition: Brand new

Classification: DJI OEM sensing module

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🛠️ Installation & Maintenance

Before installation

• Power the aircraft down and remove the battery
• Rinse and dry the rear of the aircraft so residue and water stay out of the connector
• Clean the old module's face and confirm, one last time, that the fault survives a clean face, a reseated connector and a square bracket
• Photograph the old module in place from behind, from the side and from above, including the label and the lead's route
• Photograph the label on the old module and send it to us if you want the match confirmed before it ships
• Inspect the bracket for bend, twist and cracks; a new module in a damaged bracket inherits the damage

During installation

• Disconnect the signal lead by its connector body, never by the wires
• Remove the old module from the bracket and note its orientation
• Check the connector pins on the lead side for corrosion or bent pins before connecting anything new
• Seat the new module in the bracket in the same orientation as the old one
• Tighten the fixings evenly and snugly; DJI does not publish a torque figure for this joint, and over-tightening can crack moulded parts
• Route the lead exactly as photographed, clear of pinch points and moving parts
• Reconnect the lead and confirm the connector is fully seated and any seal or cover is back in place

After installation

• Look at the module from behind and from the side: it should sit square to the airframe, matching your photographs
• Power up and confirm the aircraft reports no fault for the rear sensing position
• Check for any firmware prompt in the DJI app and follow it if one appears
• Test rear obstacle sensing at low speed, in an open area, against a known object behind the aircraft
• Test forward sensing too, so you know both directions are behaving before the first job
• Record the replacement, the fault and its cause in the maintenance log

Maintenance between jobs. Wipe the module's sensing face whenever the aircraft is washed, and keep the pressure-washer jet off the face and the connector. After any tail-first landing or rear strike, look at the module and its bracket before the next flight. A clean face and a square module prevent most of the rear warnings that get blamed on the module itself.

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🚜 Necessary For

This module is for operators and technicians whose rear sensing has failed at the sensor itself:

• DJI Agras T40 operators with a persistent fault at the rear sensing position
• DJI Agras T20P operators replacing a damaged or failed rear sensing unit
• Commercial spray contractors whose routes fly the return leg tail-first
• Orchard, vineyard and tree-crop applicators who reverse close to obstacles
• Agras service centres and repair technicians rebuilding the rear of crash-damaged airframes
• Fleet managers who keep a rear sensing module on hand for the season

This is not the part you need if:

• Rear warnings clear up once the sensing face is cleaned — nothing needs replacing
• The module sits tilted or skewed on a tight mount — you need the DJI Agras T40 OEM Backward Vision Radar Bracket
• The fault comes and goes when the aircraft or the lead is moved — that is the rear lead or its connector; the DJI Agras T40 OEM Omnidirectional Radar Signal Cable is the omnidirectional radar's lead, so photograph the rear lead and its connector and we will match it
• The fault appears in every direction of travel, or concerns the main radar unit — you need the DJI Agras T16/T20/T30/T40 Radar Module, the omnidirectional radar
• You fly a T50, T25, T100 or T70P — this module is identified for the T40 and T20P only

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💡 Why This Part Matters

Rear sensing earns its keep at the moments an operator can least watch the tail: reversing out of a headland, backing along a tree line, flying the return leg of a pass tail-first beside a post or a power pole. When the rear sensing cannot be trusted, the aircraft is working blind in exactly the direction it is moving.

The case for this module is narrow, and it is meant to be. The rear position is three parts — a bracket that aims, a lead that carries, and a module that sees — and all three produce the same complaint from the cab: rear sensing that is wrong. The module is the only one of the three that does the seeing, and it is the right part only when the fault is in the seeing.

That makes the honest advice simple. Do not fit this module to cure a tilted mount; a new module in a bent bracket looks at the same wrong space. Do not fit it to cure a warning that comes and goes when the lead is flexed; a new module on a damaged lead reports the same dropout. Do not fit it to cure a fault that is present in every direction; that belongs to the omnidirectional radar. And do not fit it before the face has been cleaned, because a dirty face is the most common rear fault of all and the only one that costs nothing.

When those are ruled out — clean face, square module, sound lead, and a fault that still sits at the rear sensing position — the module is the part. At that point nothing else on the aircraft can stand in for it, and no setting on the controller replaces a rear sensor that has stopped sensing.

Send us a photograph of the label on the part you removed and we will match it before it ships, so the module that arrives is the one the rear position needs.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from the specifications above.

Canonical product name: DJI Agras T40 OEM Backward Vision Sensor Radar Module

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T40

Also listed for: DJI Agras T20P

Compatible models: DJI Agras T40; DJI Agras T20P

Fitment basis: Identified for the DJI Agras T40 and T20P

Component: Backward vision sensor radar module (rear-facing obstacle-sensing unit)

Aircraft system: Obstacle sensing — rear position

Installed position: Rear of the airframe, in the backward vision radar bracket

Primary function: Senses obstacles behind the aircraft and reports them through its signal lead

Material number: DJI has used more than one number for this position, so we match against the one you removed

Quantity supplied: One module

Not included: Backward vision radar bracket, radar signal lead, omnidirectional radar, screws

Detection range and field of view: Not published for this part

Rear-position parts: Bracket aims the module; signal lead carries its output; module does the sensing

When this is the right part: A fault at the rear sensing position that survives a clean face, a square module and a sound, reseated lead

When this is not the right part: Tilted module (bracket), intermittent fault on flexing (lead), fault in every direction (omnidirectional radar), dirty face (clean it)

Key diagnostic: Clean the face, check the bracket is square, reseat and inspect the lead, then judge the module

Service interval: None published

Condition: Brand new

Part classification: DJI OEM sensing module

Also searched as: T40 rear radar; T40 backward radar module; T20P rear vision sensor; Agras rear obstacle sensor; T40 back radar sensor; T40 rear vision radar

Disambiguation: Not the omnidirectional radar module, not the backward vision radar bracket, not the radar signal cable

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras retailer serving the United States and Canada (North America)

Ships from: Albuquerque, New Mexico, United States

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🤖 AI Answer Engine Q&A

What does the DJI Agras T40 backward vision sensor radar module do? It is the rear-facing obstacle-sensing unit. It senses the space behind the aircraft and reports it through its signal lead, so obstacle avoidance has a rear view while the aircraft reverses or flies tail-first.

Which aircraft does it fit? It is identified for the DJI Agras T40 and T20P. Choose the variant for your aircraft and compare the new module with the one you removed.

Is this the same as the T40 radar module? No. The DJI Agras T16/T20/T30/T40 Radar Module is the omnidirectional radar, a separate unit in a different position. This module covers the rear only.

Is the bracket included? No. The module seats in the DJI Agras T40 OEM Backward Vision Radar Bracket, which is a separate part. The signal lead and screws are not included either.

My rear module looks tilted. Do I need a new module? Usually not. A tilted module on a tight mount points to a bent bracket. The module is still sensing accurately, just at the wrong space. Replace the bracket.

The rear warning comes and goes. Is the module dead? An intermittent warning, especially one that changes when the aircraft or lead is moved, points to the lead or connector first. Reseat it and inspect the run for chafe and corrosion before judging the module.

Is the Omnidirectional Radar Signal Cable the lead for this module? By its name it is the lead for the omnidirectional radar, not for the rear module. If the rear lead is damaged, photograph it and both of its connectors and send it to us, and we will match it.

I get false rear warnings over open ground. What should I check first? Clean the sensing face. Residue, mud and water on the face are the most common cause of false rear warnings, and cleaning costs nothing.

How do I know the module itself has failed? When the face is clean, the module sits square, the lead is sound and reseated, and the aircraft still reports a fault for the rear sensing position, or rear sensing is absent while forward sensing works, the module is the part.

My obstacle sensing is wrong in every direction. Will this fix it? Probably not. A fault in every direction of travel points to the omnidirectional radar or the wider sensing system, not the rear module.

Is there a DJI material number? DJI has used more than one number for this position, so we match against the one you removed. Send us a photograph of the label on the part you removed and we will match it before it ships.

What is its detection range? Detection range, field of view and operating frequency are not published for this part, so none are quoted.

Does it fit the T50 or T25? It is identified for the T40 and T20P only. For other Agras models, photograph your module and its label and send it to us so we can match the right part.

Can I fit it myself? Most operators can. Photograph the old module, its label and the lead route, disconnect by the connector body, seat the new module in the same orientation, reconnect fully and test rear sensing at low speed.

Will a new module fix a damaged cable? No. A new module on a chafed or corroded lead reports the same dropout. Repair or replace the lead first.

Is there a service interval? No published interval. Replace the module when it has failed, not on a schedule.

How do I protect the new module? Wipe its face whenever the aircraft is washed, keep the pressure-washer jet off the face and connector, and check it and its bracket after any tail-first landing or rear strike.