{"product_id":"high-output-alternator-for-volkswagen-jetta-1999-2004-1-9l-2-0l-2-8l","title":"High Output Alternator for Volkswagen Jetta (1999-2004) 1.9L 2.0L 2.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output 250A Alternator for 1999-2004 Volkswagen Jetta (Mk4)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 250-Amp High Output Alternator upgrades the factory charging system on the 1999-2004 Volkswagen Jetta to eliminate voltage drop and deliver stable high-amperage current under auxiliary electrical loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Volkswagen Jetta Charging Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eMk4\u003c\/strong\u003e Jetta alternators are rated at only 90 to 120 amps, which quickly induces thermal saturation under heavy electrical draw. When running aftermarket audio systems, auxiliary cooling fans, or high-draw accessories, the stock diode pack overheats, causing system voltage to sag below 12.8V at idle. This voltage starvation leads to headlight flickering, slow starter turnover, and premature battery degradation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a bolt-in upgrade, this high-output unit yields up to 250 amps utilizing heavy-gauge copper windings and an upgraded internal rectifier diode pack to maximize current density. Precision-machined rotor shafts and high-grade bearings dissipate internal rotor heat while sustaining stable idle voltage. Built with standard serpentine pulley spacing and direct plug-and-play pinouts, it mounts directly to the accessory bracket without requiring custom spacers or harness repinning.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 High Output 250-Amp Alternator\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1999-2004 Volkswagen Jetta\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1.9L TDI (ALH), 2.0L (AEG), 2.8L VR6 (AFP\/BDF) \/ Mk4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e90-200 hp \/ 122-195 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e13850, 13850N, 021-903-025H, 0-124-315-002, AL0730X\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1999 Volkswagen Jetta 1.9L\u003c\/li\u003e\n  \u003cli\u003e2000-2001 Volkswagen Jetta 2.0L\u003c\/li\u003e\n  \u003cli\u003e1999-2004 Volkswagen Jetta 2.8L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the Mk4 Jetta?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2004 Volkswagen Jetta equipped with the \u003cstrong\u003e1.9L\u003c\/strong\u003e, \u003cstrong\u003e2.0L\u003c\/strong\u003e, and \u003cstrong\u003e2.8L VR6\u003c\/strong\u003e engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my wiring for this alternator?\u003c\/h4\u003e\n\u003cp\u003eUpgrading the primary B+ battery feed and chassis grounds with a heavy-gauge Big 3 wiring kit is strongly recommended to handle 250 amps safely without creating resistance bottlenecks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Volkswagen Electrical Standard\u003c\/h3\u003e\n\u003cp\u003eEuropean vehicle electronics require clean, ripple-free voltage regulation to safeguard sensitive control modules, sensors, and instrument clusters from spurious diagnostic trouble codes and current spikes.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67621539414264,"sku":"DS-EJSDXP36S","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-volkswagen-jetta-1999-2004-1-9l-2-0l-2-8l-1.jpg?v=1791664353","url":"https:\/\/performancechiptuning.com\/es\/products\/high-output-alternator-for-volkswagen-jetta-1999-2004-1-9l-2-0l-2-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}