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Vivid Racing Gear 
ST3403 Autometer Wideband Air-Fuel Ratio Gauge
The ST3403 Wideband Air-Fuel Ratio (Lambda) gauge is an essential tool for any serious tuner. With its dual digital red numeric and multi-color radial LED displays, you get a clear and precise readout of your vehicle's air/fuel ratio or lambda values—whichever you prefer. The user-selectable format ensures that you can tailor the gauge to your specific tuning needs.
This gauge features adjustable scaling, allowing for customized calibration based on specialty fuel types, ensuring maximum display resolution for your application. It also includes a peak lean value recall function and programmable alarm settings, enabling quick data review and timely alerts while driving.
Thanks to its built-in photo sensor, the display automatically adjusts its intensity based on ambient lighting conditions, although you can manually control this feature with a simple switch connection. The ST3403 also offers 0-5 Volt analog and serial data outputs, making it compatible with data loggers, ECUs, and other devices for real-time closed-loop feedback, which is critical for optimizing your vehicle's performance.
Additionally, the Pro-Control output allows for automatic management of other power systems based on specific lambda conditions, enhancing your tuning capabilities. Each gauge is supplied complete with a wiring harness and includes a Bosch LSU4.9 sensor for reliable readings.
Specifications
- Gauge Type: Wideband Air-Fuel Ratio (Lambda)
- Size: 52mm (2.0625 inches)
- Bezel Color: Chrome
- Dial Color: Black
Key Features
- User-selectable air/fuel ratio or lambda readout
- Peak lean value recall for quick data review
- Programmable alarm settings for driver alerts
- Automatic display intensity adjustment
- 0-5 Volt analog and serial data outputs
- Pro-Control output for automatic system management
Fitment Information
Universal Fitment: The ST3403 is designed to be a universal fitment, making it compatible with various vehicles. However, it's recommended to conduct research to confirm compatibility with your specific vehicle model.
Customer Insights
Users appreciate the clarity and responsiveness of the ST3403 gauge, particularly noting its ability to provide real-time data that aids in fine-tuning performance. Many find the adjustable scaling feature beneficial for different fuel types, while the automatic display adjustment is praised for its convenience during night and day driving.
Other Part Numbers:
Autometer #amST3403
Proposition 65
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
AutoMeter is an aftermarket company that started in 1957. The company specializes in creating high precision gauges for various automobiles. The company was founded by Vern Westberg and initially poured sand castings in their family’s backyard. Today, Autometer is considered the leading brand when it comes to vehicle instrumentations and is being used by a lot of enthusiasts worldwide.
Experts in their FieldWith more than 60 years in the industry, the company was able to perfect its craft and developed many industry-changing products such as rev control and quick responding tachometers. They also offer an LCD Competiton data acquisition system for those who are more serious when it comes to data monitoring.
State-of-the-art FacilityAutometer has one of the industry’s most advanced manufacturing facilities based in Sycamore, IL USA. This, coupled with an advanced engineering system allows them to create parts that are durable, accurate, and precise. The company is ISO certified so you can be sure that you get quality products consistently.
Autometer has its own High-Performance division that focuses on competition spec and racing electronics and instrumentations. Using their experience, they are able to develop and continuously improve their products and adapt them to the ever-changing automotive technology.
Purchase Autometer at Vivid RacingIf you want to accurately monitor your engine’s vitals, then upgrade your gauges to Autometer. They have been the trusted brand of many enthusiasts and racers worldwide and have proven themselves as the leading brand in the industry. To know more, visit Vivid Racing and check out their list of products that would fit your specific requirement.
Auto Meter warrants to the consumer that this product will be free from defects in materials and workmanship for a period of twelve (12) months from the date of the original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at the manufacturer's option to the consumer, when determined by the manufacturer that the product failed because of defects in material or workmanship. This warranty is limited to the repair or replacement of parts in the instrument and the necessary labor done by the manufacturer to affect the repair or replacement of the instrument. In no event shall this warranty exceed the original purchase price of the instrument, nor shall the manufacturer be responsible for special, incidental or consequential damages or costs incurred due to failure of this product. Warranty claims to the manufacturer must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to the original purchaser of product and is non-transferable. All implied warranties shall be limited in duration to the said 12 month warranty period. Breaking the meter seal, improper use or installation, accident, water damage, abuse, unauthorized repairs or alterations voids this warranty. The manufacturer disclaims any liability for consequential damages due to breach of any written or implied warranty on all products made by the manufacturer.
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