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The wideband oxygen sensor built to Bosch's motorsport-durability spec, an 80 cm sensor originally developed for the sustained heat and vibration of NASCAR competition, now the standard wideband sensor behind closed-loop lambda control and AFR logging across professional racing.
Part number 0258.988.001, Bosch's motorsport-grade build of the industry-standard LSU 4.9 wideband sensing element.
The LSU 4.9 is a planar ZrO2 dual-cell limiting current sensor with an integrated heater, reading exhaust oxygen content across the full lambda 0.65 to air range. That monotonic output makes it equally useful as a stoichiometric lambda 1 sensor and as a true wideband sensor for rich and lean tuning, which is why it has become the de facto standard wideband element behind most modern engine management and standalone wideband systems.
This specific part, 0258.988.001, is Bosch's motorsport-durability build of that same LSU 4.9 sensing technology. It was originally developed for NASCAR competition, where sensors see sustained high vibration and heat cycling that shortens the life of a standard automotive-grade unit. It carries an 80 cm lead and the same 6-pin automotive-style connector used across the LSU 4.9 family, so it drops into the same wiring and controller setups your team already knows.
Like every LSU 4.9 variant, this sensor only functions correctly when paired with a controller built around the matching LSU-IC signal conditioning chip, whether that is a Bosch Lambdatronic unit or the wideband input on most modern standalone ECUs.
0258.017.025 is Bosch's standard production LSU 4.9, the sensor most aftermarket ECUs and wideband controllers reference as their factory-fit wideband part. It uses the same LSU 4.9 wideband sensing element as the sensor on this page. Creative Motorsport Solutions doesn't stock the standard 0258.017.025, we stock 0258.988.001 instead, Bosch's motorsport-durability version of that same sensor, built with enhanced resistance to the heat and vibration racing puts on a sensor, on an 80 cm lead. If your ECU or wideband controller calls for a Bosch LSU 4.9 by part number 0258.017.025, this sensor uses the same wideband technology and connector, with the added durability of Bosch's motorsport construction.
Reads lambda 0.65 to air with a monotonic output, accurate for stoichiometric lambda 1 control as well as rich and lean tuning.
Developed from NASCAR-spec requirements for enhanced resistance to sustained vibration and thermal cycling versus a standard automotive sensor.
Rated for gasoline, diesel, and E85, so one sensor covers most engine and fuel combinations.
Uses the same 6-pin automotive-style connector as the rest of the LSU 4.9 family, with an integrated trimming resistor for the sensor's characteristic curve.
Integrated heater brings the sensing element to operating temperature quickly for real-time tuning and data logging.
Works with any LSU-IC-based controller, including Bosch Lambdatronic units and the wideband inputs on most modern standalone ECUs.
Core LSU 4.9 sensing element specs, shared across the Bosch Motorsport LSU 4.9 family.
| Measurement range | Lambda 0.65 to air |
| Fuel compatibility | Gasoline / Diesel / E85 |
| Exhaust gas pressure | Up to 2.5 bar (accuracy decreases above this) |
| Exhaust gas temp (operating) | Up to 1,706°F (930°C) |
| Exhaust gas temp (short-term max) | Up to 1,886°F (1,030°C) |
| Hexagon temperature | Up to 1,112°F (600°C) |
| Thread | M18 x 1.5 |
| Wrench size | 22 mm |
| Installation torque | 30 to 44 lb-ft (40 to 60 Nm) |
| Cable length | 31.5 in (80 cm) |
| Max. vibration | 30.6 g (300 m/s², stochastic peak) |
| Wire & sleeve temperature | Up to 482°F (250°C) |
| Connector temperature | Up to 284°F (140°C) |
| Storage temperature | -40 to 212°F (-40 to 100°C) |
| Connector style | 6-pin automotive-style, with integrated trimming resistor |
| Sleeve | Fiberglass / silicone coated |
| Controller requirement | LSU-IC based controller (see below) |
Application and mechanical specs reflect Bosch's published data for the LSU 4.9 sensing element. Cable length and motorsport-durability construction are specific to this part number, 0258.988.001.
This sensor ships with the sensor-side connector attached. If you're building or repairing the harness side, we stock the matching 6-way mating connector kit, including body, contacts, and seals.
Shop the LSU 4.9 Connector Kit →The LSU 4.9 doesn't output a usable signal on its own. It needs a controller with the matching LSU-IC to drive the heater, pump the Nernst cell, and turn that into a lambda value.
Bosch's own Lambdatronic LT2 Sport and LT4 are purpose-built for this, supplying and reading up to two or four Bosch lambda sensors with CAN and analog output. Outside of the Bosch ecosystem, the LSU 4.9 is also the wideband element behind the wideband inputs on most modern standalone ECUs and dedicated wideband controllers, including systems from Haltech, Link, MoTeC, AEM, ECUMaster, and Innovate, among others. If you're not sure your controller supports the LSU 4.9 specifically, check its documentation for LSU-IC or LSU 4.9 support before ordering.
We carry a few variants of the LSU 4.9 family depending on what you're building for.
| Sensor | Best for | Key difference |
|---|---|---|
| LSU 4.9 (this product) | General motorsport, dyno, and standalone ECU installs | Motorsport-durability build, 80 cm lead, standard 6-pin connector |
| Mini-LSU 4.9 | Weight- and space-critical installs (open-wheel, motorcycle, small-bore engines) | Same LSU 4.9 sensing element and electronics, smaller M16 x 1.5 thread, lighter Inconel housing, higher hexagon temperature tolerance. Not stocked online, contact us to special order |
| LSU ADV / ADV Pre-Turbo | Newer builds standardizing on Bosch's next-generation platform | Wider working temperature range, 5-pin connector (no trim resistor), requires the LT4 ADV controller, not compatible with standard LT4/LT2 |
The LSU ADV is a separate ecosystem from LSU 4.9. It is not a drop-in replacement, since it requires the LT4 ADV controller rather than a standard LT4 or LT2.
If your ECU or dash doesn't read the LSU 4.9 natively, a CAN interface module drives the sensor and puts the lambda value on your CAN bus.
Bosch's own controller for up to four LSU 4.2, LSU 4.9, or Mini-LSU 4.9 sensors, with CAN and analog output.
Single-channel module that drives one Bosch LSU 4.9 and puts its reading on CAN, up to 32 can share one bus.
Drives up to four Bosch LSU 4.9 sensors over CAN with full MoTeC protocol compliance for M1 ECUs and dashboards.
Same four-channel capability as the LCU in a single integrated module with a JAE connector.
It uses the same LSU 4.9 wideband sensing element and the same automotive-style connector as 0258.017.025, Bosch's standard production LSU 4.9. This part, 0258.988.001, is Bosch's motorsport-durability build of that sensor, with enhanced resistance to vibration and heat and an 80 cm lead. We stock 0258.988.001 rather than the standard part.
You need a controller built around an LSU-IC, such as a Bosch Lambdatronic LT2 Sport or LT4, or a standalone ECU or wideband controller with LSU 4.9 support, which covers most modern systems from Haltech, Link, MoTeC, AEM, ECUMaster, and Innovate. Check your controller's documentation for LSU 4.9 or LSU-IC support if you're not sure.
Yes. The LSU 4.9 is widely used for dyno tuning as well as in-car installs, provided your dyno's AFR system or wideband controller supports the LSU 4.9.
Both use the same LSU 4.9 sensing element. The IMSA version is supplied specifically for IMSA WeatherTech Championship scrutineering requirements. If you don't compete in that series, this standard listing is the one you want.
The sensor ships with its own connector attached. If you're building or repairing the harness side, we stock the matching 6-way mating connector kit separately.
Currently, UPS is our preferred shipping carrier for both domestic and international orders, however we will ship via FedEx if required. At checkout, you may select your preferred service type from UPS and benefit from our discounted shipping rates. Orders received before 2:30PM EST are able to be shipped the same day, pending the items ordered are in stock at our location. If an order is placed after 12PM EST and is urgent required expedited shipping, please contact us at (386) 333-9543, and we will do everything we can to process your request.
The current ground transit days from our facility as of 05SEP2024 are listed below. The transit times are subject to change at any given time via UPS/FedEx. Please visit their website for the most accurate information.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
You may return most new, unopened items within 7 days of delivery for a full refund (less the cost of shipping). Special order items will be subject to a restocking fee, so please contact us before sending your item. Your refund will process within one week of Creative Motorsport Solutions receiving your item. Please note the time it takes your bank to process your refund may take up to 5 to 10 business days.
We diligently try our best to keep the most popular items in stock. However, certain items may have extended lead times as items have to get shipped from their respected manufacturer's warehouses to us first; and then to you. If the items are in stock, the average added transit times are:
AvioRace: 1-3 days
Bosch: 3-6 days
Motec: 1-3 days
TireWatch: 7-10 Days
Texense/XAP: Please contact us for more information.
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