VW Group OEM Remote Head Key – MQB48 Transponder, HU162 Blade

Fitments for the VW Group OEM Remote Head Key include the 2017–2020 Volkswagen Beetle, one of the final production runs of the iconic compact. Across this platform, the unit pairs remote-lock functionality with a 315 MHz RF signal and an MQB48-MM5 transponder embedded in the head of the key. Each VW Group OEM Remote Head Key communicates with the Beetle’s immobilizer control module during a cryptographic handshake that must complete before the engine will crank. Owners replacing the fob should expect a dealer-level or advanced-locksmith programming session, as MQB-generation immobilizer protocols are not accessible through basic OBD tools. When ordering a VW Group OEM Remote Head Key, confirm the HU162 keyway profile matches the vehicle’s cylinder and verify the 315 MHz operating frequency — Canadian and export-market variants sometimes differ.

VW Group OEM Remote Head Key — Transponder and Frequency Details

The MQB48-MM5 transponder inside this key belongs to the MQB (Modularer Querbaukasten) immobilizer generation that Volkswagen rolled out across much of its lineup beginning in the mid-2010s. Unlike earlier Megamos or ID48 chips, the MQB48-MM5 uses an AES-128 encrypted dialogue with the vehicle’s Body Control Module (BCM). This encryption layer means the device cannot be cloned through traditional read-and-write transponder methods; instead, it must be virgin-programmed or adapted through the BCM’s secure key-learning procedure.

The 315 MHz frequency governs the remote-entry portion of the key — locking, unlocking, and panic activation — and is standard for Volkswagen vehicles sold in the North American market. Because the remote and the transponder share the same plastic shell but serve separate subsystems, a failure in one does not necessarily disable the other. A key with a dead remote battery, for example, can still start the engine via proximity to the steering-column antenna ring, while a deprogrammed transponder will block ignition even though the remote locks and unlocks the doors normally.

HU162 Keyway and Blade Cutting

The HU162 profile is a high-security laser-cut (or track-cut) blade used across a wide swath of late-model Volkswagen, Audi, Škoda, and SEAT vehicles. Its side-milled design features cuts on both narrow edges of the blade rather than the traditional bitting on the flat face, making it resistant to casual picking and bumping. Cutting an HU162 blade requires a code-cutting machine capable of side-milling — standard pin-code or manual-duplicating machines will not produce an accurate replica.

Locksmiths typically source the key code from the vehicle’s VIN through authorized dealer databases or by decoding the existing cylinder. Because the 2017–2020 Beetle uses the same lock architecture as other MQB-platform Volkswagen models, an experienced automotive locksmith with the correct code-cutting equipment can produce a mechanically functional blade on-site. The transponder programming, however, is a separate step that follows blade cutting.

Programming Considerations for the 2017–2020 Volkswagen Beetle

Adding or replacing a VW Group OEM Remote Head Key on MQB-equipped Beetles involves a multi-step process. The technician connects a diagnostic platform — typically one that supports the Volkswagen MQB security protocol — to the vehicle’s OBD-II port and accesses the immobilizer adaptation menu within the BCM. The system requires a valid Online Security Code (also called a PIN/SKC) linked to the vehicle’s VIN, which must be obtained from Volkswagen’s online portal or generated through an authorized tool’s server connection.

Once the security code is entered, the BCM opens a limited programming window during which the new key’s MQB48-MM5 transponder is enrolled. The remote-entry function is typically learned simultaneously through the same diagnostic session, pairing the 315 MHz transmitter with the vehicle’s convenience-access receiver. After enrollment, a start-test confirms that both the immobilizer handshake and the remote functions operate correctly.

It is worth noting that all existing keys should be present during programming. The BCM re-enrolls every key in a single session, so any key not presented may be deactivated — an intentional security measure that prevents a lost or stolen key from retaining access to the vehicle.

OEM vs. Aftermarket Sourcing

Because this product carries genuine Volkswagen Group part credentials, the transponder arrives pre-loaded with the correct cryptographic seed for MQB48-MM5 enrollment. Aftermarket alternatives exist at lower price points, but quality varies significantly. Some third-party shells use the correct HU162 blank and house a compatible transponder, while others may ship with an incompatible chip revision that fails during the BCM handshake. Automotive locksmiths who regularly service Volkswagen vehicles generally maintain a stock of verified-compatible blanks and can advise owners on the trade-offs between OEM and aftermarket options.

Regardless of the source, the same diagnostic programming procedure applies. The BCM does not differentiate between an OEM and a properly spec’d aftermarket key once the transponder passes the AES-128 challenge-response sequence.

When to Contact a Locksmith

Volkswagen Beetle owners needing a replacement remote head key have two main service paths: the dealership or a qualified automotive locksmith. Dealerships guarantee OEM parts and factory-level diagnostics but often involve longer wait times and higher labor rates. Independent locksmiths with MQB programming capability can frequently complete the job on-site — including blade cutting, transponder enrollment, and remote pairing — in a single appointment. For owners who have lost all keys, the procedure becomes more involved because the BCM may need to be reset or replaced, which further underscores the importance of choosing a technician experienced with MQB-platform Volkswagen vehicles.