{"product_id":"harley-x440-throttle-body-assembly-hdfh16400acz000s","title":"Harley-Davidson X440 \/ 440X Genuine Throttle Body Assembly – HDFH16400ACZ000S – OEM EFI Intake Control Unit","description":"\u003cp data-end=\"737\" data-start=\"221\"\u003eIf your bike is facing \u003cstrong data-end=\"393\" data-start=\"290\"\u003eunstable idle, throttle hesitation, poor pickup, erratic RPM, or fueling-related rideability issues\u003c\/strong\u003e, one of the most critical EFI components to inspect is the \u003cstrong data-end=\"479\" data-start=\"453\"\u003ethrottle body assembly\u003c\/strong\u003e. This genuine \u003cstrong data-end=\"537\" data-start=\"494\"\u003eHDFH16400ACZ000S Throttle Body Assembly\u003c\/strong\u003e is a complete OEM unit supplied in sealed packaging, making it the correct choice when a mechanic has confirmed throttle body failure or when the original unit is damaged beyond cleaning\/calibration.\u003c\/p\u003e\n\u003cp data-end=\"1173\" data-start=\"739\"\u003eThe throttle body is the part of the fuel-injection intake system that regulates incoming air and works with sensors to maintain correct engine response. On a premium fuel-injected platform like the Harley X440 \/ 440X, using a mismatched or low-grade used unit can lead to poor idling, throttle lag, or repeat workshop visits. That is exactly why this listing is positioned as a \u003cstrong data-end=\"1172\" data-start=\"1118\"\u003efitment-first, diagnosis-first genuine replacement\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"1475\" data-start=\"1175\"\u003e\u003cstrong data-end=\"1207\" data-start=\"1175\"\u003eWhy buy from Under The Hood:\u003c\/strong\u003e this is not a routine consumable—it’s a high-value EFI component. We stock genuine boxed parts, pack expensive assemblies carefully, and can help you double-check the part code before dispatch so you don’t end up with an incorrect order sitting idle in your workshop.\u003c\/p\u003e\n\u003chr data-end=\"1480\" data-start=\"1477\"\u003e\n\u003cp data-end=\"1525\" data-start=\"1482\"\u003e\u003cstrong data-end=\"1523\" data-start=\"1486\"\u003eKey Features \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2214\" data-start=\"1526\"\u003e\n\u003cli data-end=\"1573\" data-start=\"1526\" data-section-id=\"anr9ny\"\u003e\n\u003cp data-end=\"1573\" data-start=\"1528\"\u003e\u003cstrong data-end=\"1550\" data-start=\"1528\"\u003ePart Number \/ SKU:\u003c\/strong\u003e \u003cstrong data-end=\"1571\" data-start=\"1551\"\u003eHDFH16400ACZ000S\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1634\" data-start=\"1574\" data-section-id=\"1oj0ohu\"\u003e\n\u003cp data-end=\"1634\" data-start=\"1576\"\u003e\u003cstrong data-end=\"1605\" data-start=\"1576\"\u003ePrinted item name on box:\u003c\/strong\u003e \u003cstrong data-end=\"1632\" data-start=\"1606\"\u003eTHROTTLE BODY ASSEMBLY\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1674\" data-start=\"1635\" data-section-id=\"l34tvc\"\u003e\n\u003cp data-end=\"1674\" data-start=\"1637\"\u003e\u003cstrong data-end=\"1645\" data-start=\"1637\"\u003eMRP:\u003c\/strong\u003e \u003cstrong data-end=\"1672\" data-start=\"1646\"\u003e₹8,510 incl. all taxes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1772\" data-start=\"1700\" data-section-id=\"1hj9ula\"\u003e\n\u003cp data-end=\"1772\" data-start=\"1702\"\u003eGenuine sealed OEM assembly, not a loose repaired\/used throttle body\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1848\" data-start=\"1773\" data-section-id=\"gwmm9o\"\u003e\n\u003cp data-end=\"1848\" data-start=\"1775\"\u003eCritical EFI component for \u003cstrong data-end=\"1846\" data-start=\"1802\"\u003eair intake control and throttle response\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1976\" data-start=\"1849\" data-section-id=\"77b74j\"\u003e\n\u003cp data-end=\"1976\" data-start=\"1851\"\u003eBest suited for bikes showing \u003cstrong data-end=\"1951\" data-start=\"1881\"\u003eidle fluctuation, hesitation, poor pickup, or fueling irregularity\u003c\/strong\u003e after proper diagnosis\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2054\" data-start=\"1977\" data-section-id=\"6un543\"\u003e\n\u003cp data-end=\"2054\" data-start=\"1979\"\u003eBetter long-term reliability than buying unknown-condition used EFI parts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2136\" data-start=\"2055\" data-section-id=\"1xjfixp\"\u003e\n\u003cp data-end=\"2136\" data-start=\"2057\"\u003eHigh-value item: ideal for customers who already have technician confirmation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2214\" data-start=\"2137\" data-section-id=\"19wzi2o\"\u003e\n\u003cp data-end=\"2214\" data-start=\"2139\"\u003e\u003cstrong data-end=\"2161\" data-start=\"2139\"\u003eReturn-prevention:\u003c\/strong\u003e buy only after part-code \/ VIN \/ existing-unit match\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2219\" data-start=\"2216\"\u003e\n\u003cp data-end=\"2248\" data-start=\"2221\"\u003e\u003cstrong data-end=\"2248\" data-start=\"2225\"\u003eCompatibility Table\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"2652\" data-start=\"2250\"\u003e\n\u003cthead data-end=\"2340\" data-start=\"2250\"\u003e\n\u003ctr data-end=\"2340\" data-start=\"2250\"\u003e\n\u003cth class=\"\" data-col-size=\"sm\" data-end=\"2257\" data-start=\"2250\"\u003eMake\u003c\/th\u003e\n\u003cth class=\"\" data-col-size=\"sm\" data-end=\"2275\" data-start=\"2257\"\u003eModel \/ Variant\u003c\/th\u003e\n\u003cth class=\"\" data-col-size=\"sm\" data-end=\"2295\" data-start=\"2275\"\u003eEngine \/ Platform\u003c\/th\u003e\n\u003cth class=\"\" data-col-size=\"sm\" data-end=\"2313\" data-start=\"2295\"\u003eFuel \/ BS Stage\u003c\/th\u003e\n\u003cth class=\"\" data-col-size=\"sm\" data-end=\"2331\" data-start=\"2313\"\u003eYears (Approx.)\u003c\/th\u003e\n\u003cth class=\"\" data-col-size=\"xl\" data-end=\"2340\" data-start=\"2331\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"2652\" data-start=\"2367\"\u003e\n\u003ctr data-end=\"2652\" data-start=\"2367\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2393\" data-start=\"2367\"\u003eHarley-Davidson (India)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2411\" data-start=\"2393\"\u003eX440 \/ 440X (❓)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2426\" data-start=\"2411\"\u003e440 platform\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2432\" data-start=\"2426\"\u003eBS6\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2447\" data-start=\"2432\"\u003e2023–onwards\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"2652\" data-start=\"2447\"\u003eBox label confirms \u003cstrong data-end=\"2494\" data-start=\"2468\"\u003eThrottle Body Assembly\u003c\/strong\u003e and Harley-X supply-chain style coding, but the model name is not printed on the visible label. Confirm by \u003cstrong data-end=\"2633\" data-start=\"2602\"\u003eVIN \/ EPC \/ old part number\u003c\/strong\u003e before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-end=\"2807\" data-start=\"2654\"\u003e\u003cstrong data-end=\"2671\" data-start=\"2654\"\u003eCaution note:\u003c\/strong\u003e This is an \u003cstrong data-end=\"2714\" data-start=\"2683\"\u003eEFI\/mechanical control part\u003c\/strong\u003e, not a casual accessory. Do not order based only on symptoms—confirm after proper diagnosis.\u003c\/p\u003e\n\u003chr data-end=\"2812\" data-start=\"2809\"\u003e\n\u003cp data-end=\"2841\" data-start=\"2814\"\u003e\u003cstrong data-end=\"2839\" data-start=\"2818\"\u003eVariants \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2971\" data-start=\"2842\"\u003e\n\u003cli data-end=\"2971\" data-start=\"2842\" data-section-id=\"fxwbo3\"\u003e\n\u003cp data-end=\"2971\" data-start=\"2844\"\u003e\u003cstrong data-end=\"2873\" data-start=\"2844\"\u003eSingle OEM assembly only:\u003c\/strong\u003e \u003cstrong data-end=\"2919\" data-start=\"2874\"\u003eHDFH16400ACZ000S – Throttle Body Assembly\u003c\/strong\u003e\u003cbr data-end=\"2922\" data-start=\"2919\"\u003eNo size\/color\/variant options shown on the label.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2976\" data-start=\"2973\"\u003e\n\u003cp data-end=\"3005\" data-start=\"2978\"\u003e\u003cstrong data-end=\"3003\" data-start=\"2982\"\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"3069\" data-start=\"3006\"\u003e\n\u003cli data-end=\"3069\" data-start=\"3006\" data-section-id=\"r76cei\"\u003e\n\u003cp data-end=\"3069\" data-start=\"3008\"\u003e\u003cstrong data-end=\"3046\" data-start=\"3008\"\u003e1 × Genuine Throttle Body Assembly\u003c\/strong\u003e – \u003cstrong data-end=\"3069\" data-start=\"3049\"\u003eHDFH16400ACZ000S\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3311\" data-start=\"3071\"\u003e\u003cstrong data-end=\"3089\" data-start=\"3071\"\u003eAccuracy note:\u003c\/strong\u003e The outer label confirms it is a complete \u003cstrong data-end=\"3158\" data-start=\"3132\"\u003eThrottle Body Assembly\u003c\/strong\u003e, but it does not list sub-components externally. Sell it as a sealed genuine assembly unless you have opened stock and documented the internal contents.\u003c\/p\u003e\n\u003chr data-end=\"3316\" data-start=\"3313\"\u003e\n\u003cp data-end=\"3360\" data-start=\"3318\"\u003e\u003cstrong data-end=\"3358\" data-start=\"3322\"\u003eInstallation \u0026amp; Maintenance Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"3819\" data-start=\"3361\"\u003e\n\u003cli data-end=\"3415\" data-start=\"3361\" data-section-id=\"4zaued\"\u003e\n\u003cp data-end=\"3415\" data-start=\"3363\"\u003eRecommended only for \u003cstrong data-end=\"3413\" data-start=\"3384\"\u003eprofessional installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3537\" data-start=\"3416\" data-section-id=\"isukk2\"\u003e\n\u003cp data-end=\"3537\" data-start=\"3418\"\u003eConfirm diagnosis before ordering: throttle body issues can overlap with sensor, injector, air leak, or wiring faults\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3604\" data-start=\"3538\" data-section-id=\"1wllc6c\"\u003e\n\u003cp data-end=\"3604\" data-start=\"3540\"\u003eMatch by \u003cstrong data-end=\"3578\" data-start=\"3549\"\u003eVIN \/ EPC \/ old unit code\u003c\/strong\u003e before opening the seal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3732\" data-start=\"3605\" data-section-id=\"15udn7s\"\u003e\n\u003cp data-end=\"3732\" data-start=\"3607\"\u003eAfter installation, the bike may require \u003cstrong data-end=\"3698\" data-start=\"3648\"\u003eidle\/throttle adaptation or ECU-related checks\u003c\/strong\u003e depending on workshop procedure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3819\" data-start=\"3733\" data-section-id=\"1exnmsc\"\u003e\n\u003cp data-end=\"3819\" data-start=\"3735\"\u003eKeep the unit sealed until fitment is confirmed to reduce high-value return disputes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"3824\" data-start=\"3821\"\u003e\n\u003cp data-end=\"3855\" data-start=\"3826\"\u003e\u003cstrong data-end=\"3853\" data-start=\"3830\"\u003eFAQs \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3964\" data-start=\"3857\"\u003e\u003cstrong data-end=\"3890\" data-start=\"3857\"\u003eQ1. What is HDFH16400ACZ000S?\u003c\/strong\u003e\u003cbr data-end=\"3893\" data-start=\"3890\"\u003eIt is a \u003cstrong data-end=\"3935\" data-start=\"3901\"\u003egenuine Throttle Body Assembly\u003c\/strong\u003e as printed on the box label.\u003c\/p\u003e\n\u003cp data-end=\"4163\" data-start=\"3966\"\u003e\u003cstrong data-end=\"4012\" data-start=\"3966\"\u003eQ2. What does a throttle body assembly do?\u003c\/strong\u003e\u003cbr data-end=\"4015\" data-start=\"4012\"\u003eIt is part of the EFI intake system and controls airflow into the engine, affecting idle stability, throttle response, and overall fueling behavior.\u003c\/p\u003e\n\u003cp data-end=\"4359\" data-start=\"4165\"\u003e\u003cstrong data-end=\"4209\" data-start=\"4165\"\u003eQ3. Will this fit my Harley X440 \/ 440X?\u003c\/strong\u003e\u003cbr data-end=\"4212\" data-start=\"4209\"\u003eTreat it as \u003cstrong data-end=\"4257\" data-start=\"4224\"\u003eVIN\/EPC confirmation required\u003c\/strong\u003e. The visible box label confirms the part identity, but not the printed model name in the photo shown.\u003c\/p\u003e\n\u003cp data-end=\"4567\" data-start=\"4361\"\u003e\u003cstrong data-end=\"4418\" data-start=\"4361\"\u003eQ4. Should I order this if my bike has pickup issues?\u003c\/strong\u003e\u003cbr data-end=\"4421\" data-start=\"4418\"\u003eOnly after proper diagnosis. Pickup or idle problems can also come from sensors, injector issues, air leaks, or wiring—not only the throttle body.\u003c\/p\u003e\n\u003cp data-end=\"4729\" data-start=\"4569\"\u003e\u003cstrong data-end=\"4622\" data-start=\"4569\"\u003eQ5. Is this a complete assembly or a repair part?\u003c\/strong\u003e\u003cbr data-end=\"4625\" data-start=\"4622\"\u003eThe box label states \u003cstrong data-end=\"4672\" data-start=\"4646\"\u003eThrottle Body Assembly\u003c\/strong\u003e, which indicates a complete assembly-level genuine part.\u003c\/p\u003e\n\u003cp data-end=\"4920\" data-start=\"4731\"\u003e\u003cstrong data-end=\"4775\" data-start=\"4731\"\u003eQ6. Why buy genuine for a throttle body?\u003c\/strong\u003e\u003cbr data-end=\"4778\" data-start=\"4775\"\u003eBecause EFI components are highly fitment-sensitive. A wrong or poor-condition unit can create repeat issues and expensive workshop time loss.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":51146355605799,"sku":null,"price":8500.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/WhatsAppImage2026-03-10at16.30.18_3.jpg?v=1773559273","url":"https:\/\/underthehood.co.in\/products\/harley-x440-throttle-body-assembly-hdfh16400acz000s","provider":"UNDER THE HOOD","version":"1.0","type":"link"}