{"id":7792,"date":"2026-07-17T18:03:37","date_gmt":"2026-07-17T16:03:37","guid":{"rendered":"https:\/\/macote.fr\/"},"modified":"2026-07-17T18:08:26","modified_gmt":"2026-07-17T16:08:26","slug":"bmw-n47-and-n57-known-issues-with-these-diesel-engines-and-how-to-anticipate-them","status":"publish","type":"post","link":"https:\/\/macote.fr\/en\/bmw-n47-and-n57-known-issues-with-these-diesel-engines-and-how-to-anticipate-them\/","title":{"rendered":"BMW N47 and N57: Known Issues with These Diesel Engines (and How to Anticipate Them)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Les moteurs diesel BMW&nbsp;<strong>N47<\/strong>&nbsp;et&nbsp;<strong>N57<\/strong>&nbsp;ont \u00e9quip\u00e9 des centaines de milliers de v\u00e9hicules des S\u00e9ries 1, 3, 5, 7, ainsi que les X1, X3, X5 et X6, entre le milieu des ann\u00e9es 2000 et 2015-2016. R\u00e9put\u00e9s pour leur agr\u00e9ment de conduite, leur souplesse et leur sobri\u00e9t\u00e9, ils ont aussi h\u00e9rit\u00e9 d&rsquo;une r\u00e9putation plus discutable : celle de moteurs qui, pass\u00e9 un certain kilom\u00e9trage, r\u00e9v\u00e8lent des faiblesses de conception r\u00e9currentes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si vous poss\u00e9dez une BMW \u00e9quip\u00e9e de l&rsquo;un de ces blocs, comprendre ces points faibles n&rsquo;est pas qu&rsquo;une question de curiosit\u00e9 technique. C&rsquo;est ce qui vous permet d&rsquo;anticiper une panne, d&rsquo;\u00e9viter une immobilisation surprise, et de faire les bons choix quand vient le moment de l&rsquo;entretien. C&rsquo;est tout l&rsquo;objet de cet article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi les moteurs N47 et N57 ont-ils cette r\u00e9putation ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le N47 (essentiellement 4 cylindres, 2.0L) et le N57 (6 cylindres, 3.0L) partagent une architecture et des composants similaires, ce qui explique qu&rsquo;ils souffrent souvent des m\u00eames pathologies. Trois grandes familles de pannes reviennent le plus fr\u00e9quemment chez les propri\u00e9taires et dans les ateliers sp\u00e9cialis\u00e9s :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>La distribution par cha\u00eene mal positionn\u00e9e<\/li>\n\n\n\n<li>Le refroidisseur EGR qui se fissure en interne<\/li>\n\n\n\n<li>La sortie de liquide de refroidissement en plastique qui se fissure<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Chacune de ces faiblesses m\u00e9rite d&rsquo;\u00eatre expliqu\u00e9e en d\u00e9tail, car elles ne se manifestent pas toutes de la m\u00eame fa\u00e7on et n&rsquo;ont pas toutes le m\u00eame niveau de gravit\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. La cha\u00eene de distribution : un d\u00e9faut de conception connu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sur les premi\u00e8res g\u00e9n\u00e9rations de N47, BMW a positionn\u00e9 la cha\u00eene de distribution \u00e0 l&rsquo;arri\u00e8re du moteur, contre la bo\u00eete de vitesses, plut\u00f4t qu&rsquo;\u00e0 l&rsquo;avant comme c&rsquo;est plus g\u00e9n\u00e9ralement l&rsquo;usage. Cette architecture rend le remplacement particuli\u00e8rement co\u00fbteux, car il n\u00e9cessite de d\u00e9poser le moteur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me ne vient pas uniquement de la position de la cha\u00eene, mais de sa conception m\u00eame : certains lots ont montr\u00e9 un \u00e9tirement pr\u00e9matur\u00e9, parfois d\u00e8s 100 000 \u00e0 130 000 km, avec un risque de rupture pouvant entra\u00eener une destruction compl\u00e8te du moteur si la cha\u00eene casse en roulant.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Signes avant-coureurs :<\/strong>&nbsp;bruit m\u00e9tallique au ralenti, cliquetis \u00e0 froid, voyant moteur allum\u00e9 avec des codes li\u00e9s au calage de distribution.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Le refroidisseur EGR : une fissure interne difficile \u00e0 d\u00e9tecter<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le circuit EGR (recirculation des gaz d&rsquo;\u00e9chappement) int\u00e8gre un refroidisseur destin\u00e9 \u00e0 abaisser la temp\u00e9rature des gaz avant leur r\u00e9introduction dans l&rsquo;admission. Sur les N47 et N57, ce refroidisseur est connu pour se fissurer de l&rsquo;int\u00e9rieur, ce qui provoque un m\u00e9lange entre le liquide de refroidissement et les gaz d&rsquo;\u00e9chappement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Concr\u00e8tement, cela se traduit par une perte de liquide de refroidissement sans fuite visible \u00e0 l&rsquo;ext\u00e9rieur du moteur, une fum\u00e9e blanche \u00e0 l&rsquo;\u00e9chappement, et parfois une pression anormale dans le circuit de refroidissement au d\u00e9marrage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est une panne insidieuse, car elle est souvent confondue avec d&rsquo;autres fuites du circuit de refroidissement, notamment celle que nous allons d\u00e9tailler maintenant.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. La sortie de liquide de refroidissement en plastique : la panne la plus fr\u00e9quente<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est ici que nous arrivons au c\u0153ur du sujet. Sur la quasi-totalit\u00e9 des N47 et N57, BMW a fait le choix de fabriquer la pi\u00e8ce de sortie du liquide de refroidissement en sortie de culasse&nbsp;<strong>en plastique<\/strong>. Cette pi\u00e8ce, souvent appel\u00e9e en fran\u00e7ais \u00ab bride \u00bb ou \u00ab conduit de liquide de refroidissement \u00bb, et en anglais&nbsp;<em>coolant pipe<\/em>,&nbsp;<em>coolant flange<\/em>&nbsp;ou&nbsp;<em>coolant outlet<\/em>, porte la r\u00e9f\u00e9rence constructeur&nbsp;<strong>11127810707<\/strong>.<\/p>\n\n\n\n<div data-block-name=\"woocommerce\/single-product\" data-product-id=\"7782\" data-wp-context=\"woocommerce\/products::{&quot;productId&quot;:7782,&quot;variationId&quot;:null}\" data-wp-interactive=\"woocommerce\/single-product\" class=\"wp-block-woocommerce-single-product woocommerce\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div data-block-name=\"woocommerce\/product-gallery\" 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class=\"wc-block-components-product-image__inner-container\"><\/div><\/a><\/div>\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t<li\n\t\t\t\t\t\tclass=\"wc-block-product-gallery-large-image__wrapper\"\n\t\t\t\t\t>\n\t\t\t\t\t\t<div data-block-name=\"woocommerce\/product-image\" data-is-descendent-of-single-product-block=\"true\" data-show-product-link=\"false\" data-show-sale-badge=\"false\" class=\"wc-block-components-product-image wc-block-grid__product-image wc-block-components-product-image--aspect-ratio-auto wp-block-woocommerce-product-image\"><a tabindex=\"-1\" href=\"#\"   ><img loading=\"lazy\" decoding=\"async\" data-wp-on--click=\"actions.openDialog\" data-wp-on--mouseleave=\"actions.resetZoom\" data-wp-on--mousemove=\"actions.startZoom\" data-wp-on--touchend=\"actions.onTouchEnd\" data-wp-on--touchmove=\"actions.onTouchMove\" data-wp-on--touchstart=\"actions.onTouchStart\" data-wp-watch=\"callbacks.toggleImageVisibility\" draggable=\"false\" fetchpriority=\"low\" tabindex=\"-1\" width=\"1200\" height=\"900\" src=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/remplacement-bride-liquide-refroidissement-bmw-n47-1200x900.jpg\" class=\"attachment-woocommerce_single size-woocommerce_single wc-block-woocommerce-product-gallery-large-image__image wc-block-woocommerce-product-gallery-large-image__image--full-screen-on-click wc-block-woocommerce-product-gallery-large-image__image--hoverZoom\" alt=\"remplacement-bride-liquide-refroidissement-bmw-n47\" data-testid=\"product-image\" data-image-id=\"7791\" style=\"object-fit:cover;\" loading=\"lazy\" srcset=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/remplacement-bride-liquide-refroidissement-bmw-n47-1200x900.jpg 1200w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/remplacement-bride-liquide-refroidissement-bmw-n47-300x225.jpg 300w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/remplacement-bride-liquide-refroidissement-bmw-n47-1024x768.jpg 1024w, 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class=\"wp-block-post-title\"><a href=\"https:\/\/macote.fr\/en\/product\/reinforced-aluminum-coolant-hose-for-bmw-n47-and-n57-engines\/\" target=\"_self\" >Conduit de liquide de refroidissement renforc\u00e9 en aluminium &#8211; BMW N47\/N57<\/a><\/h2>\n\n<div data-block-name=\"woocommerce\/product-price\" data-is-descendent-of-single-product-block=\"true\" class=\"wp-block-woocommerce-product-price\" ><div class=\"wc-block-components-product-price wc-block-grid__product-price\" >\n\t\t\t\t\t<span class=\"woocommerce-Price-amount amount\"><bdi>26,99&nbsp;<span class=\"woocommerce-Price-currencySymbol\" translate=\"no\">&euro;<\/span><\/bdi><\/span>\n\t\t\t\t<\/div><\/div>\n\n<div data-block-name=\"woocommerce\/add-to-cart-form\" class=\"wp-block-add-to-cart-form wc-block-add-to-cart-form wc-block-add-to-cart-form--input wp-block-woocommerce-add-to-cart-form\" >\n\t\n\t<form class=\"cart\" action=\"https:\/\/macote.fr\/en\/product\/reinforced-aluminum-coolant-hose-for-bmw-n47-and-n57-engines\/\" method=\"post\" enctype='multipart\/form-data'>\n\t\t\n\t\t<div class=\"quantity\" data-type=\"type-2\">\n\t\t<label class=\"screen-reader-text\" for=\"quantity_6a5ac9d6cea68\">Conduit de liquide de refroidissement renforc\u00e9 en aluminium &#8211; BMW N47\/N57 quantity<\/label>\n\t<input\n\t\ttype=\"number\"\n\t\t\t\tid=\"quantity_6a5ac9d6cea68\"\n\t\tclass=\"input-text qty text\"\n\t\tname=\"quantity\"\n\t\tvalue=\"1\"\n\t\taria-label=\"Product quantity\"\n\t\t\t\tmin=\"1\"\n\t\t\t\t\t\t\tstep=\"1\"\n\t\t\tplaceholder=\"\"\n\t\t\tinputmode=\"numeric\"\n\t\t\tautocomplete=\"off\"\n\t\t\t\/>\n\t<\/div>\n\n\t\t<button type=\"submit\" name=\"add-to-cart\" value=\"7782\" class=\"single_add_to_cart_button button alt\">Add to cart<\/button>\n\n\t\t\t<\/form>\n\n\t\n<\/div>\n\n\n<div data-block-name=\"woocommerce\/product-meta\" class=\"wp-block-woocommerce-product-meta\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-995f960e wp-block-group-is-layout-flex\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u00c0 quoi sert cette pi\u00e8ce ?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Elle est emmanch\u00e9e directement dans la culasse et assure la jonction entre la sortie du liquide de refroidissement chaud et le reste du circuit (durites, pompe \u00e0 eau, thermostat, radiateur). Son \u00e9tanch\u00e9it\u00e9 repose sur un joint torique.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pourquoi cette pi\u00e8ce casse-t-elle syst\u00e9matiquement ?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Contrairement \u00e0 la cha\u00eene de distribution ou au refroidisseur EGR, dont les d\u00e9faillances varient selon les lots de fabrication, la fragilit\u00e9 de cette pi\u00e8ce est presque&nbsp;<strong>syst\u00e9matique<\/strong>&nbsp;avec le temps, pour une raison simple : son emplacement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mont\u00e9e directement sur la culasse, elle est expos\u00e9e en permanence \u00e0 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>des temp\u00e9ratures pouvant d\u00e9passer 100 \u00b0C au contact du liquide de refroidissement,<\/li>\n\n\n\n<li>des cycles de chauffe et de refroidissement r\u00e9p\u00e9t\u00e9s \u00e0 chaque trajet,<\/li>\n\n\n\n<li>les vibrations continues du bloc moteur,<\/li>\n\n\n\n<li>la pression du circuit de refroidissement.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Le plastique, aussi r\u00e9sistant soit-il \u00e0 l&rsquo;\u00e9tat neuf, perd progressivement de son \u00e9lasticit\u00e9 sous l&rsquo;effet conjugu\u00e9 de la chaleur et du temps. Il devient cassant. Une fissure finit par appara\u00eetre, le plus souvent dans le sens de la longueur du tube, \u00e0 l&rsquo;endroit le plus expos\u00e9 thermiquement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est un sc\u00e9nario que l&rsquo;on retrouve tr\u00e8s g\u00e9n\u00e9ralement entre&nbsp;<strong>120 000 et 250 000 km<\/strong>, mais qui peut survenir plus t\u00f4t sur des v\u00e9hicules soumis \u00e0 des trajets courts r\u00e9p\u00e9t\u00e9s ou \u00e0 un usage intensif.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-1024x768.jpg\" alt=\"ite-bride-liquide-refroidissement-bmw-n47-n57\" class=\"wp-image-7789\" srcset=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-1024x768.jpg 1024w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-300x225.jpg 300w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-768x576.jpg 768w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-16x12.jpg 16w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57-1200x900.jpg 1200w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/fuite-bride-liquide-refroidissement-bmw-n47-n57.jpg 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Comment reconna\u00eetre cette panne ?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les sympt\u00f4mes les plus fr\u00e9quemment rapport\u00e9s par les propri\u00e9taires sont :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>une baisse r\u00e9guli\u00e8re et inexpliqu\u00e9e du niveau de liquide de refroidissement,<\/li>\n\n\n\n<li>un message d&rsquo;alerte \u00ab Ajouter du liquide de refroidissement \u00bb au tableau de bord,<\/li>\n\n\n\n<li>une odeur de liquide chaud apr\u00e8s un trajet,<\/li>\n\n\n\n<li>des traces blanches ou ros\u00e9es s\u00e9ch\u00e9es autour du collecteur d&rsquo;admission,<\/li>\n\n\n\n<li>des gouttes de liquide sous le v\u00e9hicule,<\/li>\n\n\n\n<li>une fuite localis\u00e9e \u00e0 l&rsquo;arri\u00e8re du moteur, difficile \u00e0 rep\u00e9rer visuellement.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me, c&rsquo;est que cette pi\u00e8ce est positionn\u00e9e dans une zone peu accessible, souvent masqu\u00e9e par le collecteur d&rsquo;admission. Beaucoup de propri\u00e9taires roulent plusieurs semaines en faisant l&rsquo;appoint de liquide avant de comprendre l&rsquo;origine exacte de la fuite, ce qui expose \u00e0 un risque r\u00e9el de surchauffe moteur si la fuite s&rsquo;aggrave brutalement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi une pi\u00e8ce plastique sur un moteur aussi sollicit\u00e9 ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Il est l\u00e9gitime de se demander pourquoi un constructeur comme BMW a fait ce choix. La r\u00e9ponse tient en deux mots :&nbsp;<strong>co\u00fbt et poids<\/strong>. Le plastique inject\u00e9 co\u00fbte moins cher \u00e0 produire en grande s\u00e9rie qu&rsquo;une pi\u00e8ce en aluminium usin\u00e9e ou moul\u00e9e, et il permet un l\u00e9ger gain de masse. Sur le papier, ce choix se d\u00e9fend en phase de conception. Dans les faits, apr\u00e8s plusieurs ann\u00e9es d&rsquo;utilisation r\u00e9elle, c&rsquo;est une des faiblesses les plus document\u00e9es de ces moteurs, au point d&rsquo;\u00eatre largement discut\u00e9e sur les forums techniques et chez les sp\u00e9cialistes BMW diesel.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"980\" src=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-1024x980.jpg\" alt=\"bride-liquide-refroidissement-joint-torique-bmw\" class=\"wp-image-7784\" srcset=\"https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-1024x980.jpg 1024w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-300x287.jpg 300w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-768x735.jpg 768w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-13x12.jpg 13w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw-1200x1149.jpg 1200w, https:\/\/macote.fr\/wp-content\/uploads\/2026\/07\/bride-liquide-refroidissement-joint-torique-bmw.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">La solution : remplacer le plastique par de l&rsquo;aluminium<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Face \u00e0 ce constat, une solution s&rsquo;est progressivement impos\u00e9e chez les professionnels et les passionn\u00e9s : remplacer la pi\u00e8ce plastique d&rsquo;origine par une version usin\u00e9e en&nbsp;<strong>aluminium<\/strong>, con\u00e7ue pour reprendre exactement les cotes, le montage et le joint torique d&rsquo;origine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est exactement la philosophie de notre&nbsp;<strong>Conduit de liquide de refroidissement renforc\u00e9 en aluminium pour BMW N47\/N57<\/strong>, qui reprend en tout point les dimensions du montage BMW d&rsquo;origine (r\u00e9f\u00e9rence remplac\u00e9e : 11127810707) sans n\u00e9cessiter la moindre modification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ce que l&rsquo;aluminium change concr\u00e8tement<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Crit\u00e8re<\/th><th>Pi\u00e8ce plastique d&rsquo;origine<\/th><th>Version aluminium<\/th><\/tr><\/thead><tbody><tr><td>R\u00e9sistance \u00e0 la chaleur<\/td><td>Se fragilise avec le temps<\/td><td>Stable dans la dur\u00e9e<\/td><\/tr><tr><td>R\u00e9sistance aux vibrations<\/td><td>Point faible connu<\/td><td>Nettement sup\u00e9rieure<\/td><\/tr><tr><td>\u00c9tanch\u00e9it\u00e9 \u00e0 long terme<\/td><td>Se d\u00e9grade avec les fissures<\/td><td>Conserv\u00e9e gr\u00e2ce \u00e0 l&rsquo;usinage pr\u00e9cis<\/td><\/tr><tr><td>Dur\u00e9e de vie estim\u00e9e<\/td><td>Souvent 120 000 \u00e0 250 000 km<\/td><td>Tr\u00e8s largement sup\u00e9rieure<\/td><\/tr><tr><td>Montage<\/td><td>Identique<\/td><td>Identique (plug-and-play)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Il ne s&rsquo;agit pas de modifier votre BMW, mais de supprimer une faiblesse de conception connue tout en conservant strictement l&rsquo;aspect, le montage et la compatibilit\u00e9 d&rsquo;origine. C&rsquo;est ce que nous appelons chez Macote une d\u00e9marche&nbsp;<strong>OEM+<\/strong>&nbsp;: conserver ce qui fait l&rsquo;ADN du v\u00e9hicule, tout en corrigeant ses points faibles document\u00e9s.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi remplacer cette pi\u00e8ce de fa\u00e7on pr\u00e9ventive ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Beaucoup de propri\u00e9taires d\u00e9couvrent cette pi\u00e8ce&#8230; au moment o\u00f9 elle fuit d\u00e9j\u00e0. Pourtant, son remplacement pr\u00e9ventif a un int\u00e9r\u00eat r\u00e9el, notamment parce que son acc\u00e8s n\u00e9cessite un d\u00e9montage partiel du moteur (souvent le collecteur d&rsquo;admission). Ce d\u00e9montage est d\u00e9j\u00e0 r\u00e9alis\u00e9 lors de certaines interventions courantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>remplacement ou nettoyage du collecteur d&rsquo;admission,<\/li>\n\n\n\n<li>intervention sur le refroidisseur ou la vanne EGR,<\/li>\n\n\n\n<li>remplacement des bougies de pr\u00e9chauffage,<\/li>\n\n\n\n<li>intervention sur les volets d&rsquo;admission (swirl flaps).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Profiter de l&rsquo;un de ces d\u00e9montages pour remplacer pr\u00e9ventivement cette pi\u00e8ce par une version aluminium permet d&rsquo;\u00e9viter de payer deux fois la m\u00eame main-d&rsquo;\u0153uvre quelques mois ou quelques ann\u00e9es plus tard.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">En r\u00e9sum\u00e9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les moteurs N47 et N57 sont de bons moteurs diesel BMW, mais ils ne sont pas exempts de faiblesses de conception connues, dont la sortie de liquide de refroidissement en plastique fait partie des plus fr\u00e9quentes et des plus faciles \u00e0 corriger durablement. Comprendre ce point faible, savoir reconna\u00eetre ses sympt\u00f4mes et anticiper son remplacement par une solution en aluminium, c&rsquo;est s&rsquo;\u00e9viter une panne co\u00fbteuse et une immobilisation \u00e9vitable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Retrouvez notre Conduit de liquide de refroidissement renforc\u00e9 en aluminium \u2013 BMW N47\/N57 dans notre boutique, con\u00e7u pour remplacer d\u00e9finitivement la r\u00e9f\u00e9rence BMW 11127810707.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les moteurs diesel BMW&nbsp;N47&nbsp;et&nbsp;N57&nbsp;ont \u00e9quip\u00e9 des centaines de milliers de v\u00e9hicules des S\u00e9ries 1, 3, 5, 7, ainsi que les X1, X3, X5 et X6, entre le milieu des ann\u00e9es 2000 et 2015-2016. R\u00e9put\u00e9s pour leur agr\u00e9ment de conduite, leur souplesse et leur sobri\u00e9t\u00e9, ils ont aussi h\u00e9rit\u00e9 d&rsquo;une r\u00e9putation plus discutable : celle de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7789,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[289],"tags":[],"class_list":["post-7792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oem"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.7 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>BMW N47 et N57 : les failles connues de ces moteurs diesel (et comment les anticiper) - MaCote.fr<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/macote.fr\/en\/bmw-n47-and-n57-known-issues-with-these-diesel-engines-and-how-to-anticipate-them\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BMW N47 et N57 : les failles connues de ces moteurs diesel (et comment les anticiper)\" \/>\n<meta property=\"og:description\" content=\"Les moteurs diesel BMW&nbsp;N47&nbsp;et&nbsp;N57&nbsp;ont \u00e9quip\u00e9 des centaines de milliers de v\u00e9hicules des S\u00e9ries 1, 3, 5, 7, ainsi que les X1, X3, X5 et X6, entre le milieu des ann\u00e9es 2000 et 2015-2016. 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