N55 serpentine belt

Replaces: 11-28-7-589-366. Warranty: This genuine part is guaranteed by BMW's factory warranty. Fits the following Vehicles: 2012-2015 BMW 335i | Sedan (F30) View related parts. BMW 335i Ribbed V-Belt. Part Number: 11287628652. …

N55 serpentine belt. Prevent your serpentine belt from slipping past your crankshaft pulley and into your engine block with this cover guard. It bolts onto the engine block behind the crankshaft pulley and provides a very tight seal that the belt can't get past. Fits on all N54, N55, and S55 engines in E82, F22, E90, E92, F30, F32, E60, F10, F13, F02, X3, X4, X5 ...

135i, 135is, 335i, 335i xDrive, X1. Complete drive belt kit composed of Contitech serpentine belt, INA automatic belt tensioner assembly, and INA idler pulley. Save for later. 36 Ratings. Available. In Stock. Price each: $178.56. QTY. Add to cart.

BMW 535i F10 N55 motor -Serpentine Belt Tensioner Replacement DIY video. These tensioners start knocking at about 60k miles. Parts about $250 USD. Here is th...BMW F10 F11 SERPENTINE BELT REPLACEMENT REMOVAL INSTALLATION 520i 523i 528i 530i 535i 518d 520d 525dIn this video we will explain how to replace the serpenti...MSRP Price: 176.43. BW Part #: 11282449731-OEM. Brand: OEM. (In Stock) Description. Customer Reviews. The N55 single-turbo engine uses a serpentine drive belt to operate the steering pump, AC compressor, and alternator. This belt, along with the tensioner and pulleys, should be replaced every 80,000 miles.If a car makes a squealing noise after the alternator has been replaced, it often needs the serpentine belt or belt tensioner replaced. Continuing to drive the car without repairin...2013 X5 E70 N55 Xdrive 35i Belt diagram. I’m posting this in hopes it is more readily available to anyone needing this particular engine belt diagram. The interwebz are full of every other variation, except this one which was hard to find. While this particular photo is from a 2014 engine, the belt orientation for the 7 pulleys is the exact same.Feb 25, 2019 ... BMW 335i N54 Serpentine Belt Install Tips ... Belt Squeal FIX N55 BMW 335i | Belt Tensioner and Belt Replacement (2010-2012) ... BMW 335i (N54) ...The belt package reads Continental 7K1860 -- When I measure it against the old belt, it seems only *slightly* smaller, like I'd expect a brand new belt to be. In my frustration with taking the belt off and putting it back on, verifying that it's on correctly, measuring pulleys, cranking on the tensioner, etc, I didn't think to try installing ...BMW Serptentine Belt Tensioner Tool - N54/N55 DM13-W186. Share: Facebook; Twitter; Pinterest; Google+; $101.20 Inc. GST. or 4 payments of $25.30 ... For rotating the tensioner on BMW N54 and N55 engines when replacing the serpentine drive belt. Double ended T60 Torx bit. Offset for correct clearance. Length: 580mm. Engines: N54 / N55 (DM13 …

Serpentine belt replacement mileage. Jump to Latest Follow ... no more than 100k I would probably say, but I think the N55's have a nasty problem with belts being sucked in it's not a big job . 2020 2 series, 230 XDrive Cabriolet F23 B46 2012 128 m-sport, vert / 2002 Dodge Neon /1992 Porsche 944 S2 cab / 1981 Ford Capri mk.3 2.8i / 1979 …In Stock. $148.99. Free Shipping. Performance Accessory Belt Kit - Kevlar Reinforced. Utilizes high quality components and our performance Kevlar reinforced belt Earn 5% …Front oil seal and serpentine belt. Bimmerpost ☰ Model Selection. 1. F40Model Year: 2019 + ... 2014 F30 N55 6MT, gray/red, M-sport, VMR 710/Mich PS 4S, MPPK, MPE ...Serpentine Belt that works for the new layout - Gates 7PK1440 (1440 is the length of the belt in mm, 56.7 inches. 7 is the number of ribs on the belt. Any belt that matches these specs should theoretically work.) The factory belt is 73 inches in length, the shorter belt is used as we are bypassing two of the pulleys.6. Serpentine Belt Failure. In the 2007-2008 models, you can see the power steering pulley positioned a little too close to the subframe. As the motor mounts wore down over time, the engine would move ever so slightly when hitting corners hard. This results in the pulley getting into contact with the subframe, thereby shredding the serpentine belt.

Tenways is an e-bike maker which has launched its first model, the CGO 600, on Indiegogo. Priced at around $1,400 this is a relatively affordable e-bike in the scheme of things, an...a) The tensioner torque bolt is 25NM =~18.5ftlb +90degrees. (This freaked me out you torque the NEW aluminum bolt to 25NM then go another 90degrees.) the bolt stretches and it is a one shot use! b) the idler bolt (16mm~5/8") torque is 40NM=~29.5ftlb. (no extra turn) BTW save the old belt as a spare. Good luck.Crank Seal Guard Protection KIT for BMW N52, N54, N55, S55 - 335i, 135i Rated as the best solution in many BMW Forums! Regular price $89.99 USD Regular price $ ... Most common reasons for the serpentine belt to come off: Oil dripping from a …The belt package reads Continental 7K1860 -- When I measure it against the old belt, it seems only *slightly* smaller, like I'd expect a brand new belt to be. In my frustration with taking the belt off and putting it back on, verifying that it's on correctly, measuring pulleys, cranking on the tensioner, etc, I didn't think to try installing ...Front oil seal and serpentine belt. Bimmerpost ☰ Model Selection. 1. F40Model Year: 2019 + ... 2014 F30 N55 6MT, gray/red, M-sport, VMR 710/Mich PS 4S, MPPK, MPE ...

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Nov 7, 2023 ... ... serpentine belt, (drive belt), on a BMW X5 ... Drive Belt Replacement BMW X5 | Serpentine Belt ... Bmw N55 in an E70 X5 Belt, Idlers, tensioner, ...BMW SERPENTINE BELT REPLACEMENT DIAGRAM N51 N52 N51 N52 N53 N54 N55 E90 E60 X3 X5 E83 E70 E82 E65 E63 E64 F25If you have BMW and you need to replace the serp...VTT BILLET BMW N54/55 Crank Seal Guard. It is a well-known issue on the BMW N54/N55/S55 platforms that your serpentine belt can fail for various reasons, when this happens you have a high chance of the belt getting sucked behind the front damper, and then being pushed past the crank seal into your oil.The main accessory belt, also known as the serpentine belt, can be another source of BMW N55 engine squeal. As the belt ages, it can stretch, causing it to slip on …N55 screeching serpentine belt/pulley Post Reply Thread Tools: Search this Thread 02-13-2018, 09:47 PM #1: Mageshkk. Canyon Carver. 50. Rep. 185. Posts. Drives: 135is 6MT; 2000 M5;1991 M5. Join Date: Aug 2016. Location: Alpharetta, ga. iTrader: N55 screeching serpentine belt/pulley. For a couple of days now, my drive belt is …

Tenways is an e-bike maker which has launched its first model, the CGO 600, on Indiegogo. Priced at around $1,400 this is a relatively affordable e-bike in the scheme of things, an...Shop Amazon for URLWALL Crank Seal Guard Plate for BMW 335i 528i 135i S55 N54 N55 N52 Engines, Front Crankshaft Seal Engine Serpentine Belt Guards Protection Guards Plate Replacement (Red) and find millions of items, delivered faster than ever.A bench grinder is the ideal tool for all those sharpening jobs, but if you don't own one you might find a belt sander works as well. Watch video. Expert Advice On Improving Your H...Crank Seal Guard Protection KIT for BMW N52, N54, N55, S55 - 335i, 135i Rated as the best solution in many BMW Forums! Regular price $89.99 USD Regular price $ ... Most common reasons for the serpentine belt to come off: Oil dripping from a …Your vehicle’s serpentine belt is a vital component that keeps your auto running smoothly. Here’s more information about what serpentine belts do, and how to spot serpentine belt p...I'm a usual here on the forums. I have owned a 135i 2011 n55 for well over 2 years now. I've had the DREADFUL SERPENTINE BELT SQUEEL. Like 5 months into ownership it started happening faintly. I replaced belt and pulley's but noise still kept on. dampner pulley and cause engine failure stopped timing and seizing up.A serpentine belt, also known as a multi-vee, poly-v, or multi-rib belt, is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air pump, etc. Over time the belt can become frayed, cracked or even break.Feb 21, 2020 ... Comments45 ; BMW 335i N54 Serpentine Belt Install Tips. OGPedXing · 95K views ; BMW E90 335i N55 Engine Belts & Pulleys in 20 Minutes or less DIY.BMW 535i F10 N55 motor -Serpentine Belt Tensioner Replacement DIY video. These tensioners start knocking at about 60k miles. Parts about $250 USD. Here is th...The economic case for immigration. Trump’s anti-immigration crusade is taking a toll on the same Rust Belt communities that voted for him. Foreign-born arrivals have been a boost f...Tested on N52/N54/N55 and S55 for 100% confirmed fitment. Key benefits: Protect crank seal from rogue accessory belts and their shredded debris; Optimized to fit N52, N54, N55, and S55 engines; Rigid design that fits within the space constraints between the engine block and harmonic balancer; Zinc-coated fasteners for corrosion and oxidation ...The serpentine belt in my 2011 N55 equipped 135i with 38000 miles tore off the other day. There was no real damage to the belt at all, no contaminants on any of the pulleys. I didn't see any oil leaks on the engine (under tray was clean). I got no warning of any kind (no squeaking etc) - it just tore off. The only indication something was wrong ...

VTT BILLET BMW N54/55 Crank Seal Guard. It is a well-known issue on the BMW N54/N55/S55 platforms that your serpentine belt can fail for various reasons, when this happens you have a high chance of the belt getting sucked behind the front damper, and then being pushed past the crank seal into your oil.

Aug 17, 2022 · Shop Amazon for URLWALL Crank Seal Guard Plate for BMW 335i 528i 135i S55 N54 N55 N52 Engines, Front Crankshaft Seal Engine Serpentine Belt Guards Protection Guards Plate Replacement (Red) and find millions of items, delivered faster than ever. 2013 X5 E70 N55 Xdrive 35i Belt diagram. I’m posting this in hopes it is more readily available to anyone needing this particular engine belt diagram. The interwebz are full of every other variation, except this one which was hard to find. While this particular photo is from a 2014 engine, the belt orientation for the 7 pulleys is the exact same. The belt I got was 1398mm long and belt I had in the car was 1480mm. Seller said I ordered belt for rwd car and it has shorter belt than xdrive. I did not find any information on this by googling. Only belt I could find for f10 n55 was 1478mm long. The car is located in finland, but it is bought from USA mayde 4 years ago. 3. N55 Engine Problems – Leaking Oil Filter Housing Gasket. Yet another weak point of the N55 is the Oil Filter Housing Gasket (OFHG), which begins to degrade and leak oil with age. An OFHG leak is not a severe problem in the short run, however, not to overly scare anyone, the oil commonly leaks onto the belt tensioner and drive belt.BMW F10 F11 SERPENTINE BELT REPLACEMENT REMOVAL INSTALLATION 520i 523i 528i 530i 535i 518d 520d 525dIn this video we will explain how to replace the serpenti...SERPENTINE BELT REPLACEMENT BMW N55 335i 535i 435i 635i M235i X1 X3 X4 X5 X6 XDRIVE35i SDRIVE35i M2 If you need to replace the serpentine belt on BMW N55 engine in this video we will... BOOTMOD3 S55 - BMW F80 F82 F87 M3 / M4 / M2 Competition Tune. $595.00. NOTE: Due to a national shortage on OEM BMW products, some products may have a 60+ day wait time. Please do not order if there is an immediate need for this product. Replace Crankshaft oil seal. Clean affected area and perform oil pressure "priming" procedure after repairs. Replace oil soaked upper radiator hose, serpentine …N52/N54/N55 serpentine belt guard. When oil gets on the serpentine belt the belt tends to slip up and get shredded and sucked in through the front main seal. This plate goes over the front main seal to protect your engine from the serpentine belt getting sucked in.

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N52/N54/N55/S55 BMW owners commonly experience a shredded serpentine belt, which can get sucked in through the crank seal on the front of the engine. Oil and coolant leaks are often the culprit, causing the serpentine belt to slip past the crank pulley, getting sucked in behind the harmonic balancer, moving its way past the crank seal, and ...Serpentine Belt that works for the new layout - Gates 7PK1440 (1440 is the length of the belt in mm, 56.7 inches. 7 is the number of ribs on the belt. ... The N55 and N54 belt PNs are different but only have a 5mm difference in length N55: OEM: 11287628653 || Continental: 7PK 1860 N54: OEM: 11287628652 || Continental: 7PK 1855Performance Kevlar Reinforced Belt - N55 F Chassis. Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Earn 5% back in ECS Rewards on orders placed 4/15-4/29. Redeem 6/3-6/28. Terms & conditions apply. 2X Entries For Spring Spin To Win Sweepstakes.This specially designed tool allows the technician to access most T-60 Torx bolt belt tensioners on BMW N54 and N55 engines found in many models from 2007 to 2013. The tensioner is in a confined area that a standard T60 socket has a hard time accessing. This unique wrench design allows the technician to loosen the spriBMW Ribbed V-Belt. Part Number: 11288613707. Vehicle Specific. Other Name: Serpentine Belt. $17.99 MSRP: $27.35. You Save: $ 9.36 ( 35%) Check the fit. Add to Cart. Fits the following BMW Models:A cassette deck, or player, is a platform that allows you add content to a cassette tape that you can playback and enjoy. To allow the information on the film in the cassette to be...A cassette deck, or player, is a platform that allows you add content to a cassette tape that you can playback and enjoy. To allow the information on the film in the cassette to be...Battery Replacement and Registration with Carly. Oil Filter Housing Gasket Replacement. Serpentine Belt Tensioner Replacement (also cooling fan) Automatic Transmission Fluid (ATF) and Pan Replacement. Water Pump / Coolant Pump and Thermostat. Brake rotor/disc and pad replacement.Best instructions I can offer: Remove intake and front intake cowl (parts over the front of the motor) Remove Radiator Fan (involves some tricky squeezing but not too hard) Take pic of belt pattern. Use breaker bar to release tension and insert service pin to hold. Unbolt unbolt unbolt. Install new in reverse. ….

#BMW #N55 #F30 SUBSCRIBE! - https://www.YouTube.com/alexthompsonINSTAGRAM - https://www.instagram.com/alex.thompsn/REPLACEMENT PARTS - https://www.fcpeuro.co...In this video I show a DIY tutorial on how to replace your BMW N55 (535i F10 in my case) Belt Tensioner. Part: https://www.rockauto.com/en/moreinfo.php?pk=11...Product Details. Earn 5% back in ECS Rewards on orders placed 4/15-4/29. Redeem 6/3-6/28. Terms & conditions apply. 2X Entries For Spring Spin To Win Sweepstakes. …This Crank Seal Protection Cover is a preventative measure application designed to prevent the belt from entering the oil pan through the front crank seal, in the event of an serpentine belt failure. The kit comes with 2 stainless steel replacement bolts, washers and 0.5ml of Loctite. These are... Just one example.Serpentine Belt that works for the new layout - Gates 7PK1440 (1440 is the length of the belt in mm, 56.7 inches. 7 is the number of ribs on the belt. Any belt that matches these specs should theoretically work.) The factory belt is 73 inches in length, the shorter belt is used as we are bypassing two of the pulleys.Tested on N52/N54/N55 and S55 for 100% confirmed fitment. Key benefits: Protect crank seal from rogue accessory belts and their shredded debris; Optimized to fit N52, N54, N55, and S55 engines; Rigid design that fits within the space constraints between the engine block and harmonic balancer; Zinc-coated fasteners for corrosion and oxidation ...BMW e92 N55 Serpentine Belt Noise . 335i So I replaced my Serpentine belt & pulleys back in January 2023. About a month ago (June 2023) I had a bad coolant leak from my upper radiator hose that dumped all my coolant out and got onto the belt & pulleys. I’m now noticing the noise coming from the belt & was wondering if I would have to change ...Serpentine belt failure on the BMW N54/N55/S55 platform is extremely common, as the serpentine belt can fail for various reasons. In the event of a serpentine belt failure, fragments of the belt may enter into the oil pan through the crank seal. This can cause severe engine damage, if not total engine failure. N55 serpentine belt, I'm a usual here on the forums. I have owned a 135i 2011 n55 for well over 2 years now. I've had the DREADFUL SERPENTINE BELT SQUEEL. Like 5 months into ownership it started happening faintly. I replaced belt and pulley's but noise still kept on. dampner pulley and cause engine failure stopped timing and seizing up., Ah then it is likely your Front Main Seal. The FMS will usually get damaged because that is the belt ingestion point at the crank of the N55. Even though you may have all the bits and pieces of your belt, it likely ripped the FMS. Easy to replace if you have an extraction tool. Mine was ripped due to the belt incident., MSRP Price: 49.67. BW Part #: 11287628661. Brand: Continental Contitech. (In Stock) Description. Customer Reviews. The main drive belt runs the power steering pump, air conditioning compressor, and alternator on the N55 6-cylinder turbo engine. It's very important not to neglect your drive belts as a failure will leave you stranded., Serpentine belt rip on N55 . My brother's serpentine belt ripped on his 5-series. Not completely, about half of it was still on and some ripped pieces were in the driveway. It was caused by the OFHG leaking, I replaced the belt and while doing so I didn't notice any leaking or wear to the crankshaft seal. Would it be safe to drive it to the shop?, 135i, 135is, 335i, 335i xDrive, X1. Complete drive belt kit composed of Contitech serpentine belt, INA automatic belt tensioner assembly, and INA idler pulley. Save for later. 36 Ratings. Available. In Stock. Price each: $178.56. QTY. Add to cart. , 591 posts · Joined 2005. #2 · Oct 7, 2019. Yes do those together but also check for leaks at the oil filter housing gasket and do that as well if there are signs of leakage because it can leak on a perfectly new serpentine belt. 2011 535i Sport 6sp MT. 2000 328ci Sport 5sp MT. 1958 Isetta bubble car., WHY SERPENTINE BELT KEEPS COMING OFF ON BMW N51 N52 N53 N54 N55 ENGINEIf you have BMW with 6 cylinder engine and your serpentine belt keeps coming off, you i..., Serpentine Belt - Keeps Shredding. Hello everyone. I really hope someone can offer some insight into this serpentine belt problem I’ve been having. The car is a 2012 X5 35i (10/2011). I bought it used in August of 2021 from a BMW dealership with about 108,000 miles. It has about 143,000 miles now. About 3,500 miles ago the serpentine shredded ..., Best instructions I can offer: Remove intake and front intake cowl (parts over the front of the motor) Remove Radiator Fan (involves some tricky squeezing but not too hard) Take pic of belt pattern. Use breaker bar to release tension and insert service pin to hold. Unbolt unbolt unbolt. Install new in reverse., Serpentine belt replacement bmw n55 335i 535i 435i 635i m235i x1 x3 x4 x5 x6 xdrive35i sdrive35i Diagram 535i belt bmw 2008 need 2008 bmw 535i belt diagram. Serpentine belt shredded, twice. Bmw serpentine 528i 525i e39 alternator soooo1988 bmw 535i serpentine belt routing and timing belt diagrams [diagram] bmw n52 engine …, I found these on amazon and they should fit.Idler pulley - https://amzn.to/2zcsTVpSerpentine belt - https://amzn.to/2WIAjswYou can email me at Camaromac91@gm... , A serpentine belt, also known as a multi-vee, poly-v, or multi-rib belt, is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air pump, etc. Over time the belt can become frayed, cracked or even break., Aug 17, 2022 · Shop Amazon for URLWALL Crank Seal Guard Plate for BMW 335i 528i 135i S55 N54 N55 N52 Engines, Front Crankshaft Seal Engine Serpentine Belt Guards Protection Guards Plate Replacement (Red) and find millions of items, delivered faster than ever. , Whether you’re struggling with routing that long serpentine belt for your vehicle or stuck with a broken belt on your snowmobile, having the right belt routing diagrams makes the p..., BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Question about noise in serpentine belt area - 2011 335i n55, Apr 9, 2019 ... I Do Cars•554K views · 14:29. Go to channel · Serpentine Belt and Belt Tensioner DIY - 2015 BMW X3 F25. #bmw #x3 #fcpeuro. Dom-iY•6.1K views., A contaminated belt can cause the engine to... After replacing the Oil Filter Housing Gasket, it was time for us to replace the pulleys and the serpentine belt., BMW SERPENTINE BELT REPLACEMENT DIAGRAM N51 N52 N51 N52 N53 N54 N55 E90 E60 X3 X5 E83 E70 E82 E65 E63 E64 F25If you have BMW and you need to replace the serp... , If you have a BMW that had a broken or shredded serpentine belt then you may find that this can lead to a bigger problem. Sometimes shops will replace the be..., Serpentine Belt - Keeps Shredding. Hello everyone. I really hope someone can offer some insight into this serpentine belt problem I’ve been having. The car is a 2012 X5 35i (10/2011). I bought it used in August of 2021 from a BMW dealership with about 108,000 miles. It has about 143,000 miles now. About 3,500 miles ago the serpentine …, 7346 Central Park Ave, Skokie, IL, United States Of America (847) 568-9966. Monday-Friday: 8:00am-6:00pm, Fitment:. For BMW 128i, 328i, 528i,M2, M3, M4, Fit for N55 S55 N54 N52 Engine. Feature: This Crank Seal Protection Cover protect the front crank seal in the event of an serpentine belt breakage to prevent the belt from entering the oil pan through the front crank seal. The item is made of high quality Billet 7075 Aluminum; complete aluminum ..., Replace Crankshaft oil seal. Clean affected area and perform oil pressure "priming" procedure after repairs. Replace oil soaked upper radiator hose, serpentine …, 2013 bmw x5 xdrive35i e70, n55 engine. My serpentine belt wrapped up behind the crank pulley and got some small pieces from the belt in the oil . I have flushed the oil out 3 times and strained the oil through cheese cloth. I haven't found any pieces of belt in the oil filter . The car only ran about a mile in limb mode before having it towed ..., This Part Fits on the following N55 Engine Equipped Vehicle This an OEM, High Quality Serpentine Belt, Tensioner an pulleys Kit. 1pc OEM Serpentine Belt. 1pc OEM Automatic Belt Tensioner Assembly. BMW N55 Engine 135,235M,335,435,535,X3,X5 Serpentine Belt,Tensioner,Pulleys Kit | eBay, This Crank Seal Protection Cover is a preventative measure application designed to prevent the belt from entering the oil pan through the front crank seal, in the event of an serpentine belt failure. The kit comes with 2 stainless steel replacement bolts, washers and 0.5ml of Loctite. These are... Just one example., Dec 24, 2022 · SERPENTINE BELT DIAGRAM INSTALLATION BMW N55 335i 535i 435i 635i M235i X1 X3 X4 X5 X6 XDRIVE35i SDRIIf you need the serpentine belt diagram on BMW N55 engine... , The serpentine belt in my 2011 N55 equipped 135i with 38000 miles tore off the other day. There was no real damage to the belt at all, no contaminants on any of the pulleys. I didn't see any oil leaks on the engine (under tray was clean). I got no warning of any kind (no squeaking etc) - it just tore off. The only indication something was wrong ..., Product Details. Earn 5% back in ECS Rewards on orders placed 4/15-4/29. Redeem 6/3-6/28. Terms & conditions apply. 2X Entries For Spring Spin To Win Sweepstakes. …, The drive belt, or serpentine belt, is a continuous rubber belt that connects the pulleys of a vehicle's engine to transmit power and help your vehicle power its accessories. Your car's serpentine belt is driven by the crankshaft and operates the power steering pump, A/C compressor, alternator, and in some vehicles, the water pump., BMW Serptentine Belt Tensioner Tool - N54/N55 DM13-W186. Share: Facebook; Twitter; Pinterest; Google+; $101.20 Inc. GST. or 4 payments of $25.30 ... For rotating the tensioner on BMW N54 and N55 engines when replacing the serpentine drive belt. Double ended T60 Torx bit. Offset for correct clearance. Length: 580mm. Engines: N54 / N55 (DM13 …, SERPENTINE BELT DIAGRAM INSTALLATION BMW N55 335i 535i 435i 635i M235i X1 X3 X4 X5 X6 XDRIVE35i SDRIIf you need the serpentine belt diagram on BMW N55 engine..., The serpentine belt in a BMW 335i N55 is responsible for powering various engine components, such as the alternator, water pump, power steering pump, and air conditioning compressor. It is crucial to have a proper understanding of the serpentine belt diagram in order to properly install or replace it.