REACH Compliance for Throttle Body: Buyer Checklist
For EU and UK sourcing, reach compliance for throttle body programmes is not a one-line supplier promise. It is a traceable materials position for the exact assembly being bought. The file has to show what the part contains, whether any substances of very high concern are present above the applicable threshold, how restricted substances are controlled, and how sub-supplier changes are handled. In practice, buyers usually work around the 0.1% w/w SVHC communication threshold at article level, plus any Annex XVII restriction that touches coatings, polymers, elastomers, electronics, solder, adhesives, connectors, finishes, or small hardware. The weak points are usually where materials meet. A good procurement record connects part number, revision, material declaration, SVHC status, lot traceability, and change-control terms. Driventus is an independent aftermarket manufacturer; brand names and OE references are used only for fitment identification. Use this guide as a working decision file: what to request, where throttle body assemblies fail, how to audit the evidence, and what to lock into the PO before stock moves.
Start With The Article, Not The Casting
A throttle body is not just an aluminium housing. It may include ADC12/A380-type castings, zinc alloy or plated steel hardware, stainless or carbon-steel shafts, polymer covers, EPDM or FKM seals, silicone gaskets, anaerobic or epoxy adhesives, surface finishes, soldered electronics, actuator components, connectors, and fasteners. Under REACH (EC) No 1907/2006, the supplier has to assess whether the article placed on the market contains restricted substances or substances of very high concern (SVHCs) above the relevant communication threshold, and whether any buyer notification duties apply.
The first procurement question is simple: can the supplier prove the material position of every relevant subassembly? A finished-unit statement saying "REACH compliant" is weak unless it is tied to the exact part number, revision, material file, and current Candidate List status. For SVHC communication, use the 0.1% weight-by-weight threshold at article level as the baseline check. Also ask whether the supplier assessed at homogeneous-material, component, or article level. The answer tells you how mature the file is.
Keep REACH separate from adjacent requirements. RoHS may apply to electrical and electronic content, but it is not the same regulation. IATF 16949:2016 and ISO 9001:2015 help with traceability, document control, and corrective action, but they do not replace a REACH declaration.
For throttle body programmes, put coatings, adhesives, sealants, plastics, elastomers, connectors, PCB materials, solder, sensors, and actuator modules at the top of the review. Record the latest Candidate List date, declaration issue date, and internal material-control revision so the file can be matched to the production lot being purchased.
Build The File In Three Rounds
Treat supplier documentation as a staged approval gate, not a cleanup task after the order is placed. Request a draft compliance pack with the quotation, a confirmed pack before pilot order release, and a final signed declaration before mass shipment.
Minimum records should include:
REACH declaration of conformity for the exact throttle body part number and revision, signed or electronically controlled by the supplier
Bill of materials or controlled material declaration covering the housing, shaft, plate, seals, connector, actuator, PCB, fasteners, and finishes
SVHC statement referencing the current Candidate List update date and the 0.1% w/w communication threshold
Restricted substance screening confirmation for coatings, elastomers, plastics, solder, pigments, adhesives, and finishes
Change-control process for materials, tooling, manufacturing site, and sub-suppliers, with a defined notice period such as 60 to 90 days before shipment of changed product
Country of origin and manufacturing site identification, including the site that performs final assembly and test
Test reports or detailed material declarations where the buyer's risk assessment requires them, especially for polymer grades, rubber compounds, solder, and conversion coatings
For a private-label or OE-equivalent programme, the file should also identify revision level, application range, connector type, bore size where specified, and any OE 06A... style cross-reference when that reference supports the buyer's catalogue or keyword structure. Broad wording such as "complies with EU regulations" does not carry much weight unless it links to a specific part, revision, and material record.
For a wider sourcing view, compare the supplier's published range in our catalog and review the supporting process detail in the quality system.
Use This Approval Matrix Before Release
This matrix is the fast way to separate a usable compliance file from a cosmetic one:
Check item
What to verify
Why it matters
Part identification
Exact part number, revision, application, connector, bore size if controlled
A lower-tier change can invalidate the buyer's file
Traceability
Lot code, production batch, site, inspection record
Supports corrective action, recalls, and customs questions
Change notification
60 to 90 days' advance notice for material or process changes
Keeps buyer records aligned with production reality
Retention
Declaration, BOM summary, test evidence, shipment lot record kept for at least 10 years where required by buyer policy
Makes later market-surveillance or customer questions answerable
</tr></thead><tbody> </tbody></table>If the throttle body includes an electronic actuator, do not stop at the casting and seal set. Confirm whether the actuator housing, connector system, PCB, solder, motor winding insulation, magnets, and potting compounds have their own material declarations. A clean metal-housing file does not clear the full assembly if the harness, overmould, or electronics contain a reportable substance above threshold.
A practical release rule: mass production stays blocked until three records align. The signed declaration, the approved sample or PPAP-style sample file, and the commercial specification on the PO must carry the same revision. If one differs, freeze release until the supplier explains the difference in writing.
Four Places Throttle Body Files Usually Break
Most REACH problems in throttle body sourcing do not come from the obvious housing material. They appear in smaller material decisions that were never pulled into the buyer's file.
1. Surface treatment
Anodising, plating, passivation, conversion coating, zinc-nickel plating, black oxide, and protective finishes can introduce regulated substances when old chemistry or loose process control is still in use. Ask which finish is used, which standard or internal specification controls it, and whether the process is monitored against current EU restrictions. For cast aluminium housings, check whether chromate conversion coatings or sealing chemicals are used. For steel screws and brackets, confirm the plating system and whether chromium VI is intentionally excluded.
2. Polymers and seals
Glass-filled nylon, PBT, PPS, EPDM, FKM, silicone, acetal, and similar materials may sit in one assembly. Each compound should be identified by grade, supplier, and revision where the supplier controls that data. A generic polymer family name is usually not enough for audit. Ask for compound-level confirmation on phthalates, PAHs in rubber contact materials where relevant, flame retardants, plasticisers, and processing aids. For seals, include hardness and material family in the engineering record, for example EPDM 60 to 75 Shore A or FKM 70 to 80 Shore A when those values are controlled by the drawing.
3. Electronics and solder
Electronic throttle bodies with integrated actuators or position sensors need their own subassembly review. Lead-bearing solder, legacy connector materials, flame retardants, potting compounds, motor winding insulation, magnets, and overmoulds should be covered by the supplier's RoHS and REACH documentation as applicable. If the supplier claims RoHS compliance for the electronics, still request the REACH position for the complete actuator and sensor module. RoHS does not cover every SVHC or Annex XVII restriction relevant to the assembly.
4. Mixed-origin hardware
Fasteners, spring clips, inserts, bushings, shaft bearings, return springs, and small brackets are easy to miss because they are low-cost items. They still form part of the article placed on the market. They should be covered by the controlled BOM or supplier material declaration. Low-value hardware is also where unapproved plating or supplier substitution often appears, so require lot-level traceability for the hardware family instead of relying only on finished-goods labels.
For OE-equivalent sourcing programmes, the strongest control is a managed BOM with documented revision history. It reduces the chance that a later material substitution creates a compliance gap after the part has already entered stock.
Audit The Paper Against The Part
A supplier audit should answer one question: does the paperwork describe the physical throttle body being purchased? Start with the sample part and packaging, then work through the file in this order:
1. Match the label, carton, and part number against the REACH declaration. 2. Check that the declaration names the manufacturing site or controlled production location. 3. Confirm the BOM revision, document owner, and effective date. 4. Review whether the Candidate List reference date is current and whether the 0.1% w/w SVHC position is stated clearly. 5. Verify whether any controlled substances are present above threshold and how they are communicated. 6. Ask for evidence that REACH requirements flow down to sub-suppliers for electronics, rubber, plastics, coatings, and fasteners. 7. Review the change-control procedure for future material, finish, site, or supplier changes. 8. Select at least one recent production lot and trace it back to incoming material records, assembly inspection, functional test, and shipment label.
During the audit, compare the actual part to the declared BOM. Connector colour and cavity count, actuator cover material, seal type, screw plating, shaft finish, and label format should match the controlled record. A useful sampling rule is one full document review per part family, plus focused checks on every different electronic module, connector platform, or seal compound.
If the supplier is certified to IATF 16949:2016 and ISO 9001:2015, use those systems as supporting evidence for document control, traceability, corrective action, and record retention. Certification is support, not proof. The real test is whether the supplier can show stable inputs, controlled change, and a declaration tied to the exact throttle body version being ordered.
For programmes that need a non-standard package, custom manufacturing can help align the BOM, fitment, packaging, and documentation from the start.
Do Not Let Compliance Outrun Fitment
A throttle body can have a clean material file and still fail the programme. Bore, flange, bolt pattern, connector, idle-control arrangement, actuator orientation, and sealing interface all have to match the target application. Manage fitment and compliance in the same approval workflow so the document file does not describe a part the buyer cannot use.
Recommended controls before release:
Dimensional inspection against the approved drawing or sample standard, including bore diameter, flange flatness, bolt-hole position, shaft end play, and connector keying
Functional check of actuator movement, return behaviour, and sensor response where applicable
Leak check where the design includes a sealed air path, using the buyer's pressure and leakage limit or a supplier-agreed control plan value
Packaging review to protect the bore, shaft, motor cover, gasket face, and connector pins during export handling
Label review for lot traceability, revision control, destination-market requirements, and private-label carton rules
Where drawings are controlled by the buyer, define tolerances instead of relying on visual matching. Typical sourcing checks may include bore and flange dimensions to the approved drawing, gasket face free from nicks, connector pin alignment verified by gauge or mating connector, and actuator return without sticking across the specified travel range. For first-article approval, ask for at least 5 to 10 samples from the intended production process, not hand-built samples from a different line.
For replacement programmes, align the compliance file with the target OE or aftermarket application range before release. Do not claim manufacturer approval, endorsement, or genuine status unless it is contractually true and documented. Cross-reference information should be used only for fitment and catalogue clarity.
When the part is ready for quotation, request a quote with the target application, annual volume, packing specification, destination market, required declaration format, expected MOQ, and target launch date.
Write The PO So It Can Be Enforced
The purchase order should carry the compliance requirement into the commercial record. Otherwise, the obligation sits in email, and emails are easy to lose when shipments are late.
Include:
Exact throttle body part number and revision
Required declaration: REACH compliance for throttle body, tied to the specified part and current Candidate List date
Packaging and label requirements, including unit box, master carton, pallet, barcode, and lot-code format where applicable
Lot traceability requirement, linking finished goods to incoming material batches and functional test records
Submission timing for documents before first shipment, normally before deposit release or before final inspection
Notice period for material, process, site, or sub-supplier changes, typically 60 to 90 days before changed product ships
Right to reject or quarantine goods if declaration, label, lot code, or revision does not match the PO
Commercial terms should reflect the compliance workload. Catalogue throttle bodies may allow lower MOQ when tooling and documentation already exist. Private-label packaging, new connector variants, or non-standard labels usually require higher MOQ because cartons, labels, compliance files, and production scheduling must be controlled separately.
In quotation comparisons, separate unit price from one-time costs such as tooling, test fixtures, artwork, documentation translation, private-label packaging, and additional third-party material testing. A low unit price can be misleading if declaration updates, sample packs, or small-lot export documents are charged later.
If the buyer sources multiple engine components from one supplier, keep the throttle body file consistent with the wider product-family record. For related assemblies, see engine components as a reference point for document control and part grouping.
A clear PO gives QA, purchasing, and import teams one record to compare against supplier declarations, customs requests, and incoming inspection results.
Choose Suppliers By How They Handle Change
Different destination markets may ask for different evidence, but the sourcing discipline stays the same. Strong suppliers maintain traceability, control revisions, and keep documentation coherent across regions.
Criterion
Minimum expectation
Traceability
Batch or lot identification on cartons, inspection records, and shipment documents
Quality system
Current certification under IATF 16949:2016 or ISO 9001:2015, with document-control and corrective-action procedures available
Material control
BOM and declaration linked to the exact part revision, including electronics and seal compounds
Change management
Written notice before material, finish, site, tooling, or process changes, normally 60 to 90 days before shipment
Export experience
Records suitable for multiple destination markets and private-label supply
MOQ, lead time, payment terms, spare capacity, and document-update cost stated before order placement
</tr></thead><tbody> </tbody></table>Use commercial questions to test whether the process is real. Ask for MOQ by SKU and by packaging format, standard production lead time after deposit and artwork approval, sample lead time, and the lead time impact of third-party testing or updated SVHC declarations. A practical supplier should be able to explain why a stocked reference can ship faster, while a private-label or modified connector version needs extra time for sample build, compliance pack confirmation, carton approval, and production scheduling.
Driventus manufactures in Taizhou, Zhejiang and exports to more than 60 countries. For throttle body sourcing, geography matters less than file discipline. The part, BOM, declarations, labels, price terms, lead time, and change-control process need to tell the same story.
Frequently asked questions
No. A statement is only useful when it is tied to the exact part number, revision, material breakdown, current SVHC reference date, and 0.1% w/w threshold position. Without that connection, the compliance file is weak.
Yes. The actuator, sensor, connector, PCB, solder, motor insulation, magnets, and potting or overmoulding materials should be checked separately because each may carry different substance risks and supplier declarations.
No. IATF 16949:2016 supports process control and traceability, but REACH compliance still requires its own material and substance documentation for the exact throttle body revision being purchased.
They accept a compliance claim without checking the BOM, revision control, Candidate List date, threshold statement, or change-notification process. That creates avoidable risk when materials or sub-suppliers change.
Use a controlled document set before approving a throttle body for EU or UK supply. Send your target application, destination market, annual volume, MOQ target, lead-time requirement, and compliance requirements through /contact.html.
