Step-by-step guide to program a Peugeot Tepee remote key with Launch X431 BSI configuration. Includes prerequisites, transponder & remote pairing, troubleshooting, and advanced tips.

Quick Answer

To add a Peugeot Tepee remote key using a Launch X431 BSI configuration tool, you access the vehicle’s Built-in Systems Interface (BSI) through the OBD-II port. The process involves reading the immobilizer code, selecting the “Key Programming” function, and following on-screen prompts to learn both the transponder chip and the remote control frequency. You’ll need at least one original programmed key (or the master key code) and a stable battery charger. The entire procedure takes 10–30 minutes, depending on your X431 version and the Tepee model year.

Understanding Your Peugeot Tepee’s Immobilizer System

The Peugeot Tepee relies on a transponder-based immobilizer that integrates directly with the BSI. The BSI acts as the vehicle’s brain for body electronics, handling everything from window control to key recognition. When you insert a key into the ignition, the immobilizer coil reads the transponder chip inside the key fob and sends that data to the BSI. If the chip’s ID matches a stored code, the engine starts. If not, the fuel pump and starter remain disabled.

Three core components you need to understand:

Transponder chip – Each key contains a small RFID chip. On Tepee models from 2005–2015, this is typically a Philips Crypto ID44 chip. On 2015+ models, it switches to a Texas T5 type.
Remote control frequency – The key fob transmits a coded radio signal (usually 433 MHz or 868 MHz, depending on your market) to lock and unlock the doors.
BSI memory – The BSI stores a limited number of key codes, typically 4–5. Once that limit is reached, you must erase all existing keys and program them from scratch.

Understanding this architecture helps you avoid common pitfalls. For example, if you try to add a key when the BSI memory is full, the tool will throw an error. You’ll then need to perform an “All Keys Lost” procedure, which wipes the memory and lets you start fresh.

Prerequisites for Key Programming

Before you connect the Launch X431, set yourself up for success. Rushing into programming without the right preparation causes most failures.

What you need:

A working Launch X431 with updated Peugeot software – models like the X431 V, PRO, PAD, or PAD VII all work. Ensure your subscription covers immobilizer special functions.
A stable 12V battery charger connected to the vehicle. Low voltage is the number one cause of interrupted programming and BSI corruption.
At least one already programmed original key. If you don’t have one, you’ll need the vehicle’s immobilizer PIN code (usually a 4-digit number).
A new blank key that matches your Tepee’s specification. If you buy a generic key from an online marketplace, confirm the transponder type and blade cut.
Clear access to the ignition key slot and the OBD-II port (located under the dashboard, driver’s side).

Warning: Do not disconnect the diagnostic tool or remove the charger during programming. An interruption mid-sequence can lock the BSI, requiring a dealer visit or EEPROM reprogramming.

Step-by-Step: Adding a Key Using Launch X431

I have performed this procedure on dozens of Tepee models across different years. The steps below reflect the most reliable sequence I’ve found.

Step 1: Connect and Initialize the Tool

Turn the ignition OFF.
Plug the X431 into the OBD-II port.
Turn the ignition ON (position 2, engine off). The dashboard lights should illuminate.
Launch the X431 software. Select Peugeot from the vehicle list, then choose Expert / Tepee (or simply “Partner” for pre-2015 models).
From the system menu, select Immobilizer or BSI Configuration – the exact label varies by X431 software version.

On newer X431 tablets, you may also see an option called MUX-BSI (Multiplexed BSI). If the direct BSI path doesn’t work, go through Diagnostics > Peugeot > Partner (Tepee) > MUX-BSI first.

Step 2: Read and Backup BSI Data

This step is often skipped, but I strongly recommend it. A backup can save you hours if something goes wrong.

Navigate to BSI > Read Immobilizer Code or Read EEPROM.
Write down or screenshot the immobilizer PIN if the tool displays it. On older Tepee models (2005–2008), you will see a 4-digit code. Newer models often hide it.
Look for a Backup EEPROM option. The X431 will save a .bin file to your tablet. Store this file safely.

If you ever need to recover a corrupted BSI, that backup file is your lifeline.

Step 3: Enter Key Programming Mode

Go to Special Functions > Key Programming (some tools label it Add Key).
The X431 will ask: “Do you have a key already programmed?” Select YES if you have a working original key.
If you have no working key at all, choose All Keys Lost. You will then need to enter the immobilizer PIN from Step 2.

Step 4: Program the Transponder Chip

This is where the actual key learning happens. Follow the on-screen commands carefully:

Take your already programmed original key, insert it into the ignition, and turn it to the ON position. Wait about 5 seconds. Turn the key OFF and remove it.
Immediately insert the new blank key, turn it to the ON position. Do not start the engine.
The X431 will read the transponder ID of the new key and send a learning command to the BSI.
Wait for a confirmation message: “Key learned successfully.” If you get an error, do not cycle the ignition – troubleshoot first (see the troubleshooting table below).

Step 5: Program the Remote Control Function

The transponder chip and the remote control are two separate systems. Many technicians finish Step 4 and assume the remote will work. It won’t – you must pair the remote frequency separately.

Exit the immobilizer menu and go to Central Locking or Remote Configuration.
Select Learn Remote.
Hold the new key fob near the steering column (where the BSI receiver is located – usually behind the lower dash panel).
Press and hold any button on the key fob for 3 seconds. The hazard lights should flash once to confirm successful pairing.
Test both the lock and unlock functions. If the lights do not flash, repeat the step with the key closer to the receiver.

Step 6: Verify and Clear Error Codes

Return to the main diagnostic menu.
Read fault codes under BSI and Immobilizer.
Clear any codes like “Key not recognized” or “Communication error”.
Cycle the ignition OFF, then ON again. Try starting the engine. If it starts, the transponder is working. Then test the remote from 10 meters away.

Troubleshooting Common Errors

Problem	Possible Cause	Solution
“Communication error with BSI”	Low battery voltage or loose OBD connection	Connect a charger, tighten the OBD plug, restart the tool
“Key not learned” after procedure	Wrong blank key type or damaged transponder	Use a genuine Peugeot blank or verify the chip type (ID44 vs T5); try a different new key
Remote works but engine won’t start	Key not cut correctly or transponder not learned	Recheck key cutting; repeat Step 4 from the beginning
Engine starts but remote does nothing	Remote pairing step missed or frequency mismatch	Repeat the remote learning step (Step 5) with the key near the BSI receiver; confirm frequency (433 MHz vs 868 MHz)
“All keys lost” error – can’t find PIN	BSI firmware locked; PIN not displayed	Retrieve PIN from Peugeot dealer using VIN, or use X431’s “Read PIN by VIN” function (if available)
BSI becomes unresponsive after programming	Locked due to too many failed attempts	Disconnect tool, turn ignition OFF, wait 15 minutes, then restart the procedure exactly as described

If remote programming fails repeatedly:

Check the new key’s battery. A weak CR2032 battery can prevent the remote signal from reaching the BSI.
Some pre-2010 Tepee models require a separate learning sequence via the central locking unit itself, not through the BSI. In that case, go to Central Locking > Learn Remote directly instead of relying on the BSI menu.

Advanced Tips & Topical Depth

Distinguishing Tepee by Platform

Not all Tepee models behave the same during programming. Knowing your platform saves time.

2005–2008 (M49 platform): The BSI communicates separately from the engine ECU. You will need a 4-digit PIN for an all-keys-lost scenario.
2008–2015 (B9 platform): BSI and engine ECU talk over CAN bus. Most models allow you to add a key without a PIN if you already have one working key.
2015+ (K9 platform): Uses rolling code encryption. You may need an online subscription on your X431 for these models.

Using the MUX (Multiplexing) Function

On certain X431 software versions, the tool may not find the BSI directly. I have seen this often on 2008–2012 Tepee models. The workaround:

Select Diagnostics > Peugeot > Partner (Tepee).
Choose MUX-BSI (Multiplexed BSI).
Then proceed with Immobilizer > Key Programming.

Reusing a Used Key

If you have a key that was previously programmed to another Peugeot, you cannot simply add it. The BSI will reject it because the old transponder ID is already stored elsewhere. To reuse it:

Use the X431 to select Immobilizer > Erase Keys. This wipes the BSI’s key memory.
Then program the used key as a new one using the steps above. The BSI will overwrite the old transponder ID.
The remote function usually resets automatically after learning.

When Only One Key Exists

If you have only one working key, I strongly advise programming a second key immediately in the same session. Losing that single key means you will need the PIN code or a dealer visit. Consider cloning the existing key with a tool like VVDI MB or Autel before entering the programming menu – that way you have a safety net.

Frequently Asked Questions

Can I program a Peugeot Tepee key without a Launch X431?
Yes, but you would need another professional-grade diagnostic tool like the Autel MaxiCOM IM608 or Xtool D7. Dealer-level software (DiagBox/PP2000) also works. Manual OBD procedures (ignition cycling) are unreliable on Tepee and rarely succeed.

Do I need a specific blank key for the Tepee?
Absolutely. The transponder type must match your vehicle year. For 2005–2015, use a Philips Crypto ID44 transponder key. For 2015 onward, use a Texas T5. Always verify the key’s blade cut matches your existing key before attempting programming.

Will programming erase my existing keys?
Only if you select “All Keys Lost” or “Erase Keys.” The “Add Key” function keeps your existing keys and simply appends the new one to the BSI memory.

How many keys can the Tepee BSI store?
Typically between 4 and 5 keys, depending on the BSI firmware. Once you hit that limit, you must erase all keys and start fresh.

What if my X431 asks for a password or subscription?
Some key programming functions require an active subscription for Peugeot special functions. Make sure your X431 software is updated to the latest version and that you have purchased the immobilizer license. Without it, the key programming menu may be greyed out.

Can I program a used key from a different Peugeot?
Yes, but only after erasing the BSI’s key memory or performing an all-keys-lost procedure. The used key must also match the correct transponder type for your Tepee.

Why does my new key turn the ignition but the remote doesn’t work?
This means the transponder chip was learned successfully, but the remote frequency pairing was missed. Re-enter the remote learning step (Step 5) and make sure the key is within arm’s reach of the steering column where the BSI receiver sits.

Final Safety Notes

Never interrupt the programming sequence – doing so can permanently lock the BSI. If you lose power mid-stream, you may need to send the BSI out for EEPROM repair.
Always use a battery maintainer. I cannot overstate this – low voltage causes more failed programming attempts than any other issue.
If the tool prompts you for a “Security Code” and you don’t have it, check the vehicle’s glovebox or service booklet. Some owners write the code on a card. Otherwise, contact a Peugeot dealer with your VIN.
For post-2018 Tepee models, some X431 versions require an online activation for BSI configuration. Ensure your tool has internet access and a valid subscription before you start.

By following this structured approach, you can reliably add and synchronize a remote key to your Peugeot Tepee using the Launch X431 BSI configuration tools. For more details on using diagnostic tools with other Peugeot models, check out our guide on [link to related guide on Peugeot 308 key programming] or [link to Launch X431 advanced functions article].

Published / Last Updated: May 10, 2026

About the Author: Erwin Salarda is an Automotive Service Equipment Technician based in the Philippines, specializing in computerized automotive diagnostic equipment such as OBD scanners and wheel alignment systems. Since 2012, he has been actively providing technical support, equipment installation, troubleshooting, after-sales service, and hands-on training for automotive service equipment used by workshops and automotive professionals.

He has received specialized training from international suppliers and manufacturers, including Launch X431 in Shenzhen, China, Lawrence Engineering Company in Guangzhou, China, and 3Excel Wheel Alignment Company in Shenzhen, China. Through these trainings, he developed advanced expertise in automotive diagnostics, calibration, wheel alignment systems, and computerized automotive service technologies.

Erwin Salarda provides professional after-sales support and technical training for automotive diagnostic and wheel alignment equipment, helping clients maximize the performance and proper use of their tools and systems. His experience covers equipment setup, software updates, calibration procedures, troubleshooting, and operational guidance for automotive workshops and service centers.

With more than a decade of experience in the automotive equipment industry, Erwin Salarda continues to support automotive businesses by delivering reliable technical expertise and practical training solutions.

For inquiries and equipment purchases, please visit https://carlifterph.com/

How to Add Peugeot Tepee Remote Keys Using Launch X431 BSI Tools