2021 BMW 330i XDrive Engine Makes A Ticking Noise

Resolve Ticking Noises in Your 2021 BMW 330i xDrive Engine

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
12% chance it's the
Exhaust Leak
0%
88% chance it's
Something else
The most common reasons a 2021 BMW 330i xDrive engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak.
  • Exhaust Leak: A damaged exhaust manifold or a loose connection in the exhaust system can cause an exhaust leak, resulting in increased noise and potential loss of engine power.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2021 BMW 330i xDrive engine makes a ticking noise?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the drive belt tensioner fails, there will be a very audible chirping, grinding, or rattling noise from the front of the engine. This is because the tensioner pulley bearing is no longer smooth, and rotating causes metal to grind at high speeds. If it is not changed immediately, there is a chance it will become dislodged, or allow the drive belt to lose tension, or break. If the belt falls off, the accessory that it drives will no longer function. Also, if the tensioner spring fails, allowing slack in the belt, it may make an extremely loud squeaking or screeching noise combined with a rattle as the tensioner bounces back and forth under load. The squealing noise is the belt slipping on the crankshaft pulley, and will require belt replacement once the belt tensioner is replaced.

An engine leaking oil does not always make a puddle on the ground. A burning smell may be noticed from the front of the vehicle after driving. This is because engine oil leaks may fall onto hot engine components, especially the exhaust manifold, and burn off before making it to the ground. This poses a risk to the engine because the leak going unnoticed may deplete the engine oil reserve, and lead to an oil starvation issue. Some engine oil leaks only occur while the engine is running, so the leak may be larger than the small spot on the ground makes it seem.

Noises can be accompanied by many annoying or worrisome sensations. Consider the noise of grinding brakes, the noise sounds much like the brake pedal and steering wheel feel. This is important, as random noises can be difficult to replicate without knowing when the sound occurs, what must be done to make the sound, and what sound it is. Any professional technician can replicate and diagnose most noises, but to ensure the vehicle is more quickly diagnosed, make sure you tell your technician these three pieces of information.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the initial diagnostic steps to take for a ticking noise in the engine of a 2021 BMW 330i xDrive?

When faced with a ticking noise in the engine of your 2021 BMW 330i xDrive, it's essential to adopt a methodical diagnostic approach. Start by checking the oil level, as insufficient oil can lead to increased friction and noise. Next, inspect the engine components for any signs of wear or looseness, particularly focusing on belts, pulleys, and the timing chain, as these can often be culprits of unusual sounds. Pay attention to the specific location of the ticking noise; this can help you narrow down potential issues. Additionally, examine the exhaust system for leaks, which can sometimes produce sounds that mimic engine problems. Utilizing a diagnostic scanner to check for error codes can provide further insights into any underlying issues. If these initial steps do not yield results, it may be time to consult a professional mechanic for a thorough evaluation. By following this structured approach, you can effectively diagnose the ticking noise and take the necessary steps toward resolution.

What are the common causes of a ticking noise in the engine of a 2021 BMW 330i xDrive?

When diagnosing a ticking noise in the engine of a 2021 BMW 330i xDrive, it's crucial to consider several common problems that could be at play. One of the primary culprits is valve train issues, which may arise from worn lifters or valves, leading to an audible ticking sound. Additionally, low engine oil levels or dirty oil can exacerbate this noise, as insufficient lubrication causes engine components to rub against each other. Another potential source of the ticking could be a faulty timing chain tensioner, which may fail to maintain proper tension on the timing chain, resulting in a noticeable ticking. An exhaust leak is also a possibility, as it can create a tapping noise, particularly when the engine is running. Lastly, a malfunctioning fuel injector can contribute to the ticking sound as it operates within the engine. Addressing these issues promptly is essential to prevent further damage, and while some DIY enthusiasts may be able to investigate these areas, consulting a qualified mechanic for a thorough inspection is always advisable to ensure accurate diagnosis and repair.

How urgent is it to address the ticking noise in the engine of a 2021 BMW 330i xDrive?

Addressing a ticking noise in the engine of a 2021 BMW 330i xDrive is crucial for several reasons. First and foremost, early detection of such noises can significantly reduce the risk of further damage to engine components, which can be costly to repair. For DIY enthusiasts, understanding that these sounds may indicate underlying issues—such as low oil levels, worn-out lifters, or valve problems—can motivate timely intervention. Additionally, neglecting these symptoms can lead to safety concerns while driving, as a deteriorating engine may result in unexpected failures. Moreover, if your vehicle is still under warranty, addressing the issue promptly ensures that you remain covered for necessary repairs, as delays could jeopardize your warranty status. Therefore, taking immediate action not only preserves the performance and longevity of your BMW but also empowers you as a DIYer to maintain your vehicle effectively.

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