{"product_id":"bmw-3-series-g20-g21-lci-carbon-fibre-performance-rear-diffuser-set-by-tre-2023","title":"BMW 3 Series G20 G21 LCI Carbon Fibre Performance Rear Diffuser Set by TRE (2023+)","description":"\u003cdiv class=\"station-tabs-local-above\"\u003e\n\u003cp\u003eThe TRE Performance Rear Diffuser for the BMW 3 Series M Sport LCI has been made to provide an aggressive centre piece on the rear of the vehicle.\u003c\/p\u003e\n\u003cp\u003eIt is constructed from 3 pieces of pre-preg Carbon Fibre.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis kit is for European cars only.\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"station-tabs-global-above\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"station-tabs-tabset mod-indicators mod-indicators-plusminus mod-indicators-after mod-vertical\"\u003e\n\u003ch4 class=\"station-tabs-tabtitle\"\u003e\u003cspan id=\"station-tabs-tab_ht-i0-t10\" class=\"station-tabs-tab mod-first is-active\" aria-controls=\"station-tabs-tabpanel_ht-i0-t10\" data-slug=\"what's-in-the-box\" role=\"button\" aria-expanded=\"true\" tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eWhat's in the box\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"station-tabs-tabpanel is-active\" id=\"station-tabs-tabpanel_ht-i0-t10\" aria-labelledby=\"station-tabs-tab_ht-i0-t10\" role=\"region\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"station-tabs-tabcontent\"\u003e\n\u003cul\u003e\n\u003cli\u003e3 x TRE Carbon Fibre (pre-preg, 2x2 Weave) Rear Diffuser Pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"station-tabs-tabtitle\"\u003e\u003cspan id=\"station-tabs-tab_ht-i0-t16\" class=\"station-tabs-tab is-active\" aria-controls=\"station-tabs-tabpanel_ht-i0-t16\" data-slug=\"compatible-models\" role=\"button\" aria-expanded=\"true\" tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eCompatible models\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"station-tabs-tabpanel is-active\" id=\"station-tabs-tabpanel_ht-i0-t16\" aria-labelledby=\"station-tabs-tab_ht-i0-t16\" role=\"region\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"station-tabs-tabcontent\"\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 3 Series LCI\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e(2023+, G20 G21)\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis kit is for European cars only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"station-tabs-tabtitle\"\u003e\u003cspan id=\"station-tabs-tab_ht-i0-t60\" class=\"station-tabs-tab is-active\" aria-controls=\"station-tabs-tabpanel_ht-i0-t60\" data-slug=\"how-to-install\" role=\"button\" aria-expanded=\"true\" tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eHow to install\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"station-tabs-tabpanel is-active\" id=\"station-tabs-tabpanel_ht-i0-t60\" aria-labelledby=\"station-tabs-tab_ht-i0-t60\" role=\"region\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"station-tabs-tabcontent\"\u003e\n\u003ch2 data-start=\"293\" data-end=\"362\"\u003e\u003cstrong data-start=\"296\" data-end=\"362\"\u003eBMW G20 M Sport — TRE 3-Piece Rear Diffuser Installation Guide\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"364\" data-end=\"453\"\u003e\u003cstrong data-start=\"364\" data-end=\"379\"\u003eDifficulty:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e★★☆☆☆ (Moderate)\u003cbr data-start=\"396\" data-end=\"399\"\u003e\u003cstrong data-start=\"399\" data-end=\"417\"\u003eTime Required:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e30–45 minutes\u003cbr data-start=\"431\" data-end=\"434\"\u003e\u003cstrong data-start=\"434\" data-end=\"451\"\u003eTools Needed:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"454\" data-end=\"633\"\u003e\n\u003cli data-start=\"454\" data-end=\"484\"\u003e\n\u003cp data-start=\"456\" data-end=\"484\"\u003ePlastic trim removal tools\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"485\" data-end=\"509\"\u003e\n\u003cp data-start=\"487\" data-end=\"509\"\u003eT20 Torx screwdriver\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"510\" data-end=\"531\"\u003e\n\u003cp data-start=\"512\" data-end=\"531\"\u003e8mm socket wrench\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"532\" data-end=\"568\"\u003e\n\u003cp data-start=\"534\" data-end=\"568\"\u003eMicrofiber towel or fender cover\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"569\" data-end=\"633\"\u003e\n\u003cp data-start=\"571\" data-end=\"633\"\u003eOptional: a friend or second person for alignment assistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong data-start=\"644\" data-end=\"675\"\u003eStep 1: Prepare the Vehicle\u003c\/strong\u003e\n\u003col data-start=\"676\" data-end=\"1068\"\u003e\n\u003cli data-start=\"676\" data-end=\"745\"\u003e\n\u003cp data-start=\"679\" data-end=\"745\"\u003ePark the vehicle on a flat surface and engage the parking brake.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"746\" data-end=\"839\"\u003e\n\u003cp data-start=\"749\" data-end=\"839\"\u003eIf possible, raise the rear of the car slightly using ramps or a lift for easier access.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"840\" data-end=\"928\"\u003e\n\u003cp data-start=\"843\" data-end=\"928\"\u003eUse a microfiber towel or fender cover to protect the paint around the rear bumper.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"929\" data-end=\"1068\"\u003e\n\u003cp data-start=\"932\" data-end=\"1068\"\u003eEnsure the diffuser and surrounding area are clean and free of dirt or debris—this prevents scratches during removal and installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cstrong data-start=\"1079\" data-end=\"1114\"\u003eStep 2: Remove the OEM Diffuser\u003c\/strong\u003e\n\u003col data-start=\"1115\" data-end=\"1617\"\u003e\n\u003cli data-start=\"1115\" data-end=\"1261\"\u003e\n\u003cp data-start=\"1118\" data-end=\"1261\"\u003eBegin by removing the screws along the underside of the OEM diffuser using an\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1196\" data-end=\"1210\"\u003e8mm socket\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1214\" data-end=\"1233\"\u003eT20 Torx driver\u003c\/strong\u003e, depending on your model.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1262\" data-end=\"1376\"\u003e\n\u003cp data-start=\"1265\" data-end=\"1376\"\u003eOnce the screws are out, use a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1296\" data-end=\"1325\"\u003eplastic trim removal tool\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto gently pry the diffuser away from the bumper.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1377\" data-end=\"1528\"\u003e\n\u003cp data-start=\"1380\" data-end=\"1528\"\u003eWork your way from one side to the other, carefully releasing the diffuser clips.\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1462\" data-end=\"1489\"\u003eAvoid using metal tools\u003c\/strong\u003e, as they can damage the bumper tabs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1529\" data-end=\"1617\"\u003e\n\u003cp data-start=\"1532\" data-end=\"1617\"\u003eOnce all clips are disengaged, pull the OEM diffuser straight out and set it aside.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cstrong data-start=\"1628\" data-end=\"1672\"\u003eStep 3: Test-Fit the TRE Diffuser Pieces\u003c\/strong\u003e\n\u003col data-start=\"1673\" data-end=\"2035\"\u003e\n\u003cli data-start=\"1673\" data-end=\"1824\"\u003e\n\u003cp data-start=\"1676\" data-end=\"1824\"\u003eBefore full installation,\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1702\" data-end=\"1744\"\u003etest-fit all three TRE diffuser pieces\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(left, right, and center) to familiarize yourself with alignment and fitment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1825\" data-end=\"1927\"\u003e\n\u003cp data-start=\"1828\" data-end=\"1927\"\u003eCheck that all clip points and screw holes line up correctly with the factory mounting locations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1928\" data-end=\"2035\"\u003e\n\u003cp data-start=\"1931\" data-end=\"2035\"\u003eIf necessary, make small adjustments to ensure a flush, even fit before securing anything permanently.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cstrong data-start=\"2046\" data-end=\"2098\"\u003eStep 4: Install the TRE Diffuser — Side Sections\u003c\/strong\u003e\n\u003col data-start=\"2099\" data-end=\"2489\"\u003e\n\u003cli data-start=\"2099\" data-end=\"2258\"\u003e\n\u003cp data-start=\"2102\" data-end=\"2258\"\u003eBegin with the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"2117\" data-end=\"2145\"\u003eleft-side diffuser piece\u003c\/strong\u003e. Align the mounting tabs with the OEM clip points, then press firmly until all clips snap securely into place.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2259\" data-end=\"2400\"\u003e\n\u003cp data-start=\"2262\" data-end=\"2400\"\u003eRepeat the process on the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"2288\" data-end=\"2317\"\u003eright-side diffuser piece\u003c\/strong\u003e, confirming that both ends are evenly seated and flush with the bumper contours.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2401\" data-end=\"2489\"\u003e\n\u003cp data-start=\"2404\" data-end=\"2489\"\u003eReinstall any factory screws along the lower edge of each side piece if applicable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cstrong data-start=\"2500\" data-end=\"2538\"\u003eStep 5: Install the Center Section\u003c\/strong\u003e\n\u003col data-start=\"2539\" data-end=\"3029\"\u003e\n\u003cli data-start=\"2539\" data-end=\"2702\"\u003e\n\u003cp data-start=\"2542\" data-end=\"2702\"\u003eAlign the\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"2552\" data-end=\"2579\"\u003ecenter diffuser section\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebetween the two installed side pieces. Ensure that the edges overlap cleanly and that all clip points are fully engaged.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2703\" data-end=\"2803\"\u003e\n\u003cp data-start=\"2706\" data-end=\"2803\"\u003ePress upward and inward firmly until the center piece locks into place with an audible “click.”\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2804\" data-end=\"2905\"\u003e\n\u003cp data-start=\"2807\" data-end=\"2905\"\u003eReinstall the remaining screws along the underside of the diffuser to secure all three sections.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2906\" data-end=\"3029\"\u003e\n\u003cp data-start=\"2909\" data-end=\"3029\"\u003ePerform a final visual check—ensure all edges are even, clips are seated, and the diffuser sits flush with the bumper.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cstrong data-start=\"3040\" data-end=\"3055\"\u003eFinal Notes\u003c\/strong\u003e\n\u003cul data-start=\"3056\" data-end=\"3383\"\u003e\n\u003cli data-start=\"3056\" data-end=\"3145\"\u003e\n\u003cp data-start=\"3058\" data-end=\"3145\"\u003eRecheck all clip points and screws after a short drive to ensure nothing has shifted.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3146\" data-end=\"3267\"\u003e\n\u003cp data-start=\"3148\" data-end=\"3267\"\u003eFor an OEM-like fitment, patience and even pressure during installation are key—avoid forcing any section into place.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3268\" data-end=\"3383\"\u003e\n\u003cp data-start=\"3270\" data-end=\"3383\"\u003eIf you plan to apply ceramic coating or PPF to the diffuser, do so\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"3337\" data-end=\"3360\"\u003ebefore installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor the best finish.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"station-tabs-tabtitle\"\u003e\u003cspan data-pro-tab-id=\"32707\" class=\"station-tabs-tab mod-pro-tab is-active\" data-type=\"text\" id=\"station-tabs-tab_pt-i0-t32707\" aria-controls=\"station-tabs-tabpanel_pt-i0-t32707\" data-slug=\"tre\" role=\"button\" aria-expanded=\"true\" tabindex=\"0\"\u003e\u003cspan class=\"station-tabs-tabtext\"\u003eTRE\u003c\/span\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv data-pro-tab-id=\"32707\" class=\"station-tabs-tabpanel is-active\" data-type=\"text\" id=\"station-tabs-tabpanel_pt-i0-t32707\" aria-labelledby=\"station-tabs-tab_pt-i0-t32707\" role=\"region\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"station-tabs-tabcontent\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1279\/7961\/files\/TRE_Product_Page_Image.png?v=1583927680\" alt=\"TRE\" width=\"1834\" height=\"252\"\u003eTRE (\"T-R-E\") products represent the pinnacle of range. Each product is built to the very highest standards and are covered by an industry leading\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003etwo year warranty\u003c\/span\u003e\u003cspan\u003e. The sole aim of each part in this range is to push boundaries and bring you closer to\u003cem\u003e\u003cspan class=\"Apple-converted-space\"\u003e T\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003cem\u003ehe Racers Edge\u003c\/em\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe pre-preg (dry) manufacturing method used in TRE carbon fibre parts is lighter, stronger and more premium than those found in it's range.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"TRE","offers":[{"title":"Default Title","offer_id":51548549775707,"sku":"TR-BG20LRDCFE","price":890.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0805\/8611\/3371\/files\/bmw-3-series-g20-g21-lci-carbon-fibre-performance-rear-diffuser-set-by-tre-2023-tre-254524.webp?v=1760618324","url":"https:\/\/reinhartautohaus.com\/products\/bmw-3-series-g20-g21-lci-carbon-fibre-performance-rear-diffuser-set-by-tre-2023","provider":"Reinhart Autohaus","version":"1.0","type":"link"}