2003 bmw 325i serpentine belt diagram

How do you change a serpentine belt on a BMW 325i?

How to Replace a Serpentine Belt on BMW 325i Pop the hood. Locate the belt -routing diagram , which is a sticker on the core support. Place the 3/8-inch ratchet and socket on the hex-head bolt in the middle of the tensioner and turn it counterclockwise to release the tension on the belt . While still holding the ratchet, pull the belt off the pulleys.

How much does it cost to replace a serpentine belt on a BMW?

BMW 328i Serpentine Belt Replacement Cost Estimate. The average cost for a BMW 328i serpentine belt replacement is between $155 and $195. Labor costs are estimated between $112 and $142 while parts are priced between $42 and $53. This range does not include taxes and fees, and does not factor in your unique location.

How long do BMW serpentine belts last?

between 50,000 and 100,000 miles

What is the proper tension for a serpentine belt?

The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more, the belt is loose, and if twisted less, the belt is too tight.

Can I put WD 40 on a squeaky belt?

Spray just enough WD – 40 onto the belt to lightly cover the area where the squeal occurs. Oversaturating the belt will result in severe slipping, which can permanently damage the belt . WD – 40 is a water displacement lubricant and should remove the moisture from the belt ribs.

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Can you replace a serpentine belt yourself?

Serpentine belt replacement is easy because today’s automatic drive belt tensioners eliminate the need to loosen bolts or pry components into position for retensioning. Just rotate the tensioner, remove the old belt and install a new one .

Will a car start with a broken serpentine belt?

The short answer is yes, a car can start with a broken serpentine belt . Your serpentine belt is responsible for powering the accessories in your car so if your serpentine belt is broken or disconnected it would not prevent your car from starting .

How expensive is it to replace a serpentine belt?

A typical serpentine belt start at around $25 and goes up to $75 at most. If you know some car repair basics, you could change the belt yourself, and it may save you paying labor charges somewhere between $75 and $120 . All together, you’re looking at around $100 to $195 to replace your serpentine belt.

What happens if the serpentine belt breaks while driving?

A broken serpentine belt will immediately lead to a loss of power assist for the steering system. A broken serpentine belt will stop the water pump from circulating antifreeze through the cooling system. This ultimately means that once the serpentine belt breaks the engine can overheat anytime or anywhere.

What causes a serpentine belt to break?

The most serious failure is when the serpentine belt breaks completely. This is usually the result of a belt in poor condition, or a problem with one of the accessory components being driven by the belt . A failed bearing in a pulley being driven by the serpentine belt will also cause the belt to break .

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Can a serpentine belt stretch?

Serpentine belts stretch with age and use, but the tensioner is spring-loaded to keep the belt tight on the pulleys. If a belt starts slipping, the tensioner should always be checked to see if it is functioning properly. There should be no binding or resistance and the pulley should spin smoothly.

How do I know if my serpentine belt is bad?

Symptoms of a Bad or Failing Serpentine /Drive Belt Squealing noise from the front of the vehicle. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt . Power steering and AC not working. If the serpentine belt completely fails and breaks, then your car will break down. Engine overheating. Cracks and wear on the belt .

How do you know if your serpentine belt tensioner is bad?

1. Grinding or squeaking noise from the belts or tensioner . The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner . If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.

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