PRODUCT DETAILS
Link ECU CAN Lambda Module - Bosch LSU 4.9 Wideband (LNK-125-1000)
This is the no-drama way to get trustworthy wideband data into your Link ECU. The CAN Lambda module runs a Bosch LSU 4.9 sensor and sends your AFR and lambda data to the ECU digitally over the CAN bus, instead of hoping an analog voltage stays clean. If you tune your own car, or you pay a tuner and want to verify what the engine actually sees, this is one of those parts you stop thinking about because it just works. Guessing at AFR is how engines learn expensive lessons; this takes the guessing out.
Digital CAN, Not Noisy Analog
This is the core advantage, so it's worth understanding.
The module uses a Bosch LSU 4.9 wideband sensor and pushes the data to the ECU over the CAN bus rather than an analog voltage wire. That matters because analog wideband signals are prone to real headaches, voltage drift, electrical noise, and the phantom lean spikes that come from ignition noise bleeding into the signal. A digital CAN connection sidesteps all of it: the data stays digital all the way to the ECU, clean and consistent.
In practice, that means your AFR data stays reliable when the car gets heat-soaked on track, when the fans kick on, or when the ignition system is spraying noise into everything. If your car already runs CAN, adding this is usually easier than running an analog wire back to the ECU and hoping your grounding is perfect.
No Free-Air Calibration
A genuine convenience over many wideband setups.
A lot of widebands need periodic free-air calibration to stay accurate. This module skips that entirely, it reads the OEM sensor trim resistor for automatic calibration, so each sensor's individual characteristics are accounted for automatically. You're not pulling the sensor to recalibrate it; it stays accurate on its own. One less maintenance task, and one less way for your data to drift out of trust.
Monitoring Or Closed-Loop Fueling
It works two ways on a Link setup.
Wire it into your existing CAN network and set it up in PCLink, and it serves either as a monitoring input (so you can see and log true AFR) or as the lambda input for closed-loop fuel control. For a race car, it's a repeatable, trustworthy lambda source lap after lap, which is exactly what you want when you're relying on the data to protect the engine.
Link supports stacking up to eight modules on one CAN bus, which is handy for staged fuel banks, multiple engines, or just logging everything on a serious build.
Fits Link And Other CAN ECUs
It's designed for Link's G4+ and G4X ECUs and configures in PCLink, but it also works with other aftermarket ECUs that support configurable CAN. The CAN bit rate is adjustable (1Mb/s, 500kb/s, 250kb/s, 125kb/s) to match your network, so it integrates cleanly whether it's on a Link bus or another configurable-CAN system.
What's In The Box
- Link CAN Lambda module
- Bosch LSU 4.9 wideband O2 sensor
- Deutsch 4-way connector kit
- O2 bung and plug
- Quick start guide
- Link stickers
Specifications
- Part number: LNK-125-1000
- Sensor: Bosch LSU 4.9 (aftermarket use)
- Lambda measurement range: 0.67 to 10.0 lambda
- CAN communication: 1Mb/s, 500kb/s, 250kb/s, 125kb/s
- Input voltage: controller 7.5-20V, sensor 10.8-16.5V
- Operating temperature: -20°C to 100°C
- Enclosure: 60 x 26 x 15mm
- Supports up to 8 modules on one CAN bus
Who Should Run This
This is for the tuner or serious DIYer on a Link ECU (or another configurable-CAN ECU) who wants accurate, digital AFR data without fighting analog noise or recalibrating widebands. A Bosch LSU 4.9 sensor, a clean CAN connection, automatic calibration, and the stability to hold its reading when the car's hot and the electrical system is busy. Wire it into your CAN bus, set it up in PCLink, and tune with data you can trust.
Part number: LNK-125-1000. Sensor: Bosch LSU 4.9 wideband. Comms: CAN, configurable 125kb/s to 1Mb/s. Fits: Link G4+/G4X and other configurable-CAN ECUs, set up in PCLink. Calibration: automatic via OEM trim resistor, no free-air cal. Range: 0.67-10.0 lambda. Stacking: up to 8 modules per bus. Includes: module, LSU 4.9 sensor, Deutsch connector kit, bung and plug, quick start guide.