NOx Sensors
916+ references
Application-focused NOx sensor solutions for passenger cars, commercial vehicles and modern SCR systems.
Diesel Aftertreatment Solutions
Diesel Aftertreatment Solutions for Professional Aftermarket Partners
BEST GROWTH helps distributors, private-label brands and remanufacturing specialists identify, validate and expand diesel aftertreatment product programmes across passenger car, commercial vehicle and off-highway applications.
Submit an OE reference, vehicle application, product photograph or enquiry list for application review.
- 916+
- NOx sensor references available for cross-checking
- 2,000+
- Aftertreatment references across the product portfolio
- 30+
- R&D team members supporting product and application work
- 32
- NOXIA calibration stations used for NOx sensor evaluation
Where to begin
Start with Your Requirement
Four common starting points for professional partners. Choose the one that matches your project and we will take it from there.
Expand an Aftertreatment Product Range
For distributors and wholesalers building broader passenger-car, commercial-vehicle and off-highway coverage across sensors, DEF components and repair parts.
Browse the product rangeDevelop a Private-Label Programme
Product selection, branding, packaging and product-data support, subject to an agreed project scope.
Discuss a private-label projectFind the Correct Replacement
Identification from OE numbers, vehicle and engine information, installation position, connector details and photographs of the existing part.
Send a reference for reviewSource Repair and Remanufacturing Components
DEF pump repair parts, dosing components and technical cooperation for professional remanufacturing programmes.
View repair partsSystem context
One Aftertreatment System. Multiple Connected Components.
Sensors, dosing components and catalysts do not work in isolation. Understanding where a component sits in the exhaust flow is the fastest way to identify the correct replacement.
- Stage 1Engine
- Exhaust gas out
- Stage 2DOC
- EGT sensors
- Stage 3DPF
- PM monitoring
- EGT sensors
- Stage 4DEF Dosing
- DEF pump
- DEF dosing module
- Stage 5SCR
- Upstream NOx sensor
- SCR components
- Stage 6ASC / Tailpipe
- Downstream NOx sensor
System architecture and component position vary by vehicle, engine and emissions platform. Compatibility must be confirmed by OE reference and application.
Product programmes
Aftertreatment Product Programmes
Build an individual category or combine related products into a broader aftermarket programme.
DEF / AdBlue Dosing Modules
190+ references
DEF doser valves, dosing valves and doser injectors engineered for stable DEF injection and effective SCR operation.
DEF / Urea Pumps
70+ references
Complete pump assemblies and related solutions for a wide range of SCR systems.
PM Sensors
280+ references
Particulate matter sensor solutions for modern diesel emission monitoring systems.
EGT Sensors
450+ references
Exhaust gas temperature sensors covering a wide range of vehicle and engine applications.
DEF Pump Repair Parts
100+ references
Motors, diaphragms, filters, valves, heating components and other professional repair solutions.
How it works
From Reference Analysis to Reliable Supply
A structured six-step route from your first enquiry to repeat supply. Each step has a clear input from you and a clear output from our team.
- Step 1
Requirement and Market Review
You provide: You share target market, vehicle parc focus and current range gaps.
You receive: We outline which product families are relevant to that programme.
- Step 2
OE and Application Analysis
You provide: You send OE references, vehicle/engine data, installation position or photos.
You receive: We confirm matches by OE reference and application, and flag open questions.
- Step 3
Product and Programme Selection
You provide: You confirm priorities, volumes and packaging expectations.
You receive: A structured reference list with product data for the agreed scope.
- Step 4
Sample Testing and Validation
You provide: You define the validation expectation for your market.
You receive: Samples with applicable test evidence — applicable tests vary by product family and application.
- Step 5
Production and Quality Control
You provide: You approve the validated references and specification.
You receive: Standardized production with incoming, in-process and outgoing inspection.
- Step 6
Delivery and Technical Follow-Up
You provide: You provide shipment and labelling requirements.
You receive: Delivery plus technical follow-up on fitment and field questions.
Applicable tests vary by product family and application, and are agreed before samples are prepared.
Validation
Testing Built Around Product Function and Application
Testing capability grouped by what it is intended to prove, rather than by equipment list.
NOx Sensor Evaluation
- Controlled NO and O₂ concentration conditions
- Sensor calibration
- Signal and communication verification
Electrical and Functional Testing
- Electrical signal verification
- Oscilloscope testing
- Functional response checking
Environmental Evaluation
- Thermal shock testing
- High-temperature and humidity exposure
- Microscopic or particle analysis where applicable
DEF System Testing
- Spray-pattern evaluation
- Flow and response testing
- DEF pump performance testing
Quality Inspection
- Incoming material inspection
- Dimensional inspection
- Outgoing inspection and traceability
Applicable test items and acceptance criteria depend on the product family, vehicle platform and agreed customer specification.
Who we support
Built for Professional Aftermarket Partners
The support we provide differs by partner type. These are the practical working points for each.
Distributors and Wholesalers
- Category-by-category range building
- Cross-reference checking from OE lists
- Product data for catalogue and webshop use
- Combined enquiries across several product families
Private-Label Brands
- Product selection for a defined programme scope
- Branding, labelling and packaging support
- Product-data preparation for your own catalogue
- Scope agreed per project before start
Remanufacturing Specialists
- DEF pump repair components
- Dosing and sensor components
- Diagnostic and testing equipment
- Technical cooperation on component-level questions
Fleet and Service Networks
- Replacement identification from OE number or photo
- Upstream and downstream sensor position confirmation
- Technical guides for fault diagnosis
- Repeat-supply planning for common references
Application coverage
Coverage Across Major Vehicle and Engine Applications
Filter the catalogue by the application segments that matter to your market.
Availability and compatibility are confirmed by product reference and application—not implied by vehicle category alone.
Behind the portfolio
Engineering Evidence Behind the Product Portfolio
Product programmes are supported by in-house calibration and testing, standardized production and inspection, and a European-based technical contact point.
Representative workflow — not a customer case study
How BG Supports a Distributor Expanding Beyond NOx Sensors
- Review the existing NOx listThe current NOx references are checked against our catalogue by OE number.
- Identify adjacent familiesDEF dosing modules, DEF pumps and EGT sensors used on the same platforms are proposed.
- Validate a first batchSamples are prepared with the test items applicable to those product families.
- Plan the roll-outPackaging, product data and repeat-supply planning are agreed for the new range.
Next step
Send Us Your OE List or Product-Range Requirement
Our team will review the references, confirm the required application information and respond with available matches, technical questions and a quotation plan.
On the contact page you can provide OE references, vehicle applications, product photographs, indicative quantities and your target market — everything needed to start the review.
What to prepare
- OE reference numbers (or your enquiry list)
- Vehicle make, model, engine and build year
- Installation position (upstream / downstream, before / after filter)
- Photographs of the existing part, nameplate and connector
- Indicative quantities and target market
Technical knowledge
Background Reading Before You Specify a Part
Technical guides that help confirm the component, its position in the system and the likely fault mechanism.
Ready to Build or Expand Your Aftertreatment Product Range?
Send your OE references, target applications, product photographs or enquiry list. BEST GROWTH will help review the requirement and identify the next technical and commercial steps.