{"product_id":"infiniti-q45-4-5l-vin-b-4th-digit-4-5l-engine-2003-2004","title":"Infiniti Q45 4.5L, VIN B, 4th digit 4.5L Engine (2003-2004)","description":"\u003cdiv class=\"ds-message _63c77b1\"\u003e\n\u003cdiv class=\"ds-markdown\"\u003e\n\u003ch1 class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eAuthentic 4.5L V8 engine block designed for 2003–2004 Infiniti Q45 applications\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eRestore your Infiniti Q45's ultimate luxury performance with our OEM 4.5L VK45DE engine. Designed specifically for 2003-2004 Q45 models (4th VIN digit B), this premium V8 powerplant delivers the sophisticated power and refined acceleration that defined Infiniti's flagship luxury sedan. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eEngine Specifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003ctable style=\"width: 57.5033%; height: 244px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003cth style=\"width: 41.0245%; height: 19.5833px; text-align: center;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 58.4873%; height: 19.5833px; text-align: center;\"\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eDisplacement\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003e4.5L V8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eEngine Code\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003eVK45DE (VIN B)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eHorsepower\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003e340 HP \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eTorque\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003e333 lb-ft \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eFuel System\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003eElectronic Multi-Port Fuel Injection\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eValvetrain\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003eDOHC 32-Valve with CVTCS\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eBlock Material\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003eAluminum Block \u0026amp; Heads\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"text-align: center; width: 41.0245%; height: 19.5833px;\"\u003eEmissions\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 58.4873%; height: 19.5833px;\"\u003e\u003cspan\u003eLEV Compliant\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n \u003c\/div\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eCompatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 2003-2004 Infiniti Q45 4th VIN Digit B.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"ds-markdown-paragraph\"\u003e\n\u003cspan\u003e\u003cstrong\u003ePricing \u0026amp; Condition Options:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\n\u003cdiv class=\"ds-scroll-area _1210dd7 c03cafe9\"\u003e\n\u003ctable style=\"width: 84.3739%; height: 195px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003cth style=\"width: 27.007%; height: 19.5833px;\"\u003e\u003cstrong\u003eMileage Range\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 19.0622%; height: 19.5833px; text-align: center;\"\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 53.3852%; height: 19.5833px; text-align: center;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 27.007%; height: 19.5833px;\"\u003e\u003cstrong\u003e30K-60K Miles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 19.0622%; height: 19.5833px;\"\u003e\u003cspan\u003e$ 1,911.00\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center; width: 53.3852%; height: 19.5833px;\"\u003e\u003cspan\u003eLow mileage, excellent compression, full service records\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 27.007%; height: 19.5833px;\"\u003e\u003cstrong\u003e60K-90K Miles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 19.0622%; height: 19.5833px;\"\u003e\u003cspan\u003e$ 1,576.00\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 53.3852%; height: 19.5833px; text-align: center;\"\u003e\u003cspan\u003eWell-maintained, strong performance, minimal wear\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 27.007%; height: 19.5833px;\"\u003e\u003cstrong\u003e90K-120K Miles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 19.0622%; height: 19.5833px;\"\u003e\u003cspan\u003e$ 1,350.00\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 53.3852%; height: 19.5833px; text-align: center;\"\u003e\u003cspan\u003eGood condition, includes updated timing components\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 27.007%; height: 19.5833px;\"\u003e\u003cstrong\u003e120K-150K Miles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 19.0622%; height: 19.5833px;\"\u003e\u003cspan\u003e$ 1,195.00\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 53.3852%; height: 19.5833px; text-align: center;\"\u003e\u003cspan\u003eCost-effective solution for Q45 restoration\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n \u003c\/div\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eKey Features: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003e\u003cstrong\u003eLong Block Assembly:\u003c\/strong\u003e Fully assembled engine block featuring crankshaft, pistons, cylinder head, and complete valvetrain components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSmooth \u0026amp; Reliable: \u003c\/span\u003e\u003c\/strong\u003eWe guarantee that the engine will not smoke, leak or sound. It will be a good smooth runner.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eBacked by Warranty:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Full warranty coverage on the complete engine assembly ensures dependable protection and confidence in your investment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003eShipping Information:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eStandard shipping 5-7 business days\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eExpedited shipping are available for an extra cost\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan\u003eFrequently Asked Questions?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 class=\"ds-markdown-paragraph\"\u003eQ: Is this engine compatible with the Q45's 5-speed automatic transmission?\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eA:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes, this engine is specifically calibrated for the Q45's 5-speed automatic transmission with manual shift mode and adaptive shift control.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"ds-markdown-paragraph\"\u003eQ: What improvements were made for the 2003-2004 model years?\u003c\/h3\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e OEM 4.5L V8 engine for 2003–2004 Infiniti Q45 with improved fuel injection, variable valve timing, and enhanced cooling for reliable performance.\u003c\/div\u003e\n\u003cdiv class=\"ds-markdown\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-markdown\"\u003e\n\u003ch3 class=\"ds-markdown-paragraph\"\u003eQ: Are these becoming rare engines to find?\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eA:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes, clean low-mileage examples of these final second-generation Q45 engines are becoming increasingly sought after by collectors and enthusiasts.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan\u003eReady to Order?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan\u003eSelect your desired mileage tier and proceed to checkout via the Add to Cart function. Our Infiniti technical team stands ready to confirm fitment specifications and provide comprehensive guidance on V8 engine installation for your 2003–2004 Q45.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Infiniti","offers":[{"title":"30K-60K miles","offer_id":45954337669377,"sku":null,"price":1911.0,"currency_code":"USD","in_stock":true},{"title":"60K-90K miles","offer_id":45954337702145,"sku":null,"price":1576.0,"currency_code":"USD","in_stock":true},{"title":"90K-120K miles","offer_id":45954337734913,"sku":null,"price":1350.0,"currency_code":"USD","in_stock":true},{"title":"120K-150K miles","offer_id":45954337767681,"sku":null,"price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0616\/7471\/7441\/files\/Buick_Envision_2.0L_f0626475-4b42-4083-8dbd-6bede0f533cc.jpg?v=1738172123","url":"https:\/\/www.bestuseautoparts.com\/products\/infiniti-q45-4-5l-vin-b-4th-digit-4-5l-engine-2003-2004","provider":"Best Use Auto Parts","version":"1.0","type":"link"}