BMW 335i Thermostat Replacement Cost

Between $436 and $502, the average cost for a BMW 335i Thermostat Replacement is between $436 and $502. Labor costs are estimated between $168 and $212 while parts are priced between $268 and $290. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed. For a more accurate estimate based on your location, use our Fair Price Estimator below. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

Detailed Cost Breakdown for BMW 335i Thermostat Replacement

Understanding the individual components of your BMW 335i thermostat replacement cost is crucial for budgeting and making informed decisions. The total price you'll pay is a sum of parts, labor, and potentially other associated costs. Let's delve deeper into what influences these figures.

Pricing Comparison Table

Please note: This table represents an average and can vary significantly based on the factors discussed below.

Regional Cost Variations

The geographical location of your BMW 335i significantly impacts the overall cost of a thermostat replacement. Shops in major metropolitan areas or regions with a higher cost of living will generally charge more for both parts and labor compared to those in smaller towns or rural areas. This is due to differences in overhead, wages, and local market demand.

OEM vs. Aftermarket Parts Costs

When it comes to replacing your BMW 335i thermostat, you'll typically have the option between Original Equipment Manufacturer (OEM) parts and aftermarket alternatives.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Shop Type Differences (Dealership vs. Independent)

The type of repair shop you choose for your BMW 335i thermostat replacement will also influence the final bill.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Factors Affecting Cost

Several variables can influence the final BMW 335i thermostat replacement cost, extending beyond the basic parts and labor. Understanding these factors can help you anticipate potential expenses.

Vehicle Mileage Impact

As your BMW 335i accumulates mileage, certain components may show signs of wear and tear, which can impact repair costs. While mileage itself doesn't directly increase the price of a new thermostat, it can influence the condition of surrounding components. For example, older hoses might be more brittle and prone to cracking during the replacement process, necessitating their replacement as well. This can add to the overall cost.

Geographic Location Effects

As mentioned earlier, your physical location plays a significant role. Areas with a higher cost of living, higher demand for specialized automotive services, or more stringent environmental regulations on fluid disposal can all contribute to higher repair bills. Conversely, you might find lower prices in regions with a lower cost of living and less demand for specialized European auto mechanics.

Additional Repairs Commonly Needed

A thermostat replacement on a BMW 335i can sometimes uncover or be related to other issues within the cooling system. It's common practice for mechanics to inspect related components during this service.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

The cost of these additional repairs will, of course, increase the total BMW 335i thermostat replacement cost.

Seasonal Pricing Variations

While less common for routine maintenance like thermostat replacement, some shops might adjust pricing slightly based on seasonal demand. During peak driving seasons (like summer when overheating is more prevalent), you might find slightly higher labor rates, although this is generally not a significant factor for thermostat jobs.

Diagnostic & Repair Process

Understanding how a thermostat issue is diagnosed and how the replacement is performed can shed light on the labor involved and the expertise required for your BMW 335i.

How are thermostat issues diagnosed?

Diagnosing thermostat issues on a BMW 335i involves a systematic approach to pinpoint the exact cause of cooling system malfunctions, primarily overheating or poor temperature regulation.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

How is a thermostat replaced?

The process of replacing a thermostat on a BMW 335i, while seemingly straightforward, requires precision and adherence to specific procedures to ensure a leak-free and correctly functioning cooling system.

1. Coolant Drainage: The first step involves safely draining the existing engine coolant from the system. This is typically done by opening a drain plug on the radiator or lower hose, or by siphoning it out. Proper disposal of used coolant is essential due to its toxicity.
2. Accessing the Thermostat Housing: The thermostat is usually housed in a specialized housing, often integrated with a coolant outlet pipe. Accessing this housing might require removing other components, such as air intake ducts, coolant hoses, or even engine covers, depending on the specific engine layout of the 335i.
3. Removing the Old Thermostat: Once the housing is accessible, the technician will unbolt and remove it. The old thermostat will be carefully extracted. It's crucial to note the orientation of the old thermostat before removal, as its position is critical for proper function.
4. Cleaning the Sealing Surface: The mating surface between the thermostat housing and the engine block (or cylinder head) must be thoroughly cleaned. Any old gasket material, debris, or corrosion must be removed to ensure a perfect seal for the new thermostat.
5. Installing the New Thermostat: The new thermostat, along with a new gasket or O-ring (often supplied with the new thermostat or housing), is installed in the correct orientation.
6. Reinstalling the Housing: The thermostat housing is then reattached to the engine, and the bolts are tightened to the manufacturer's specified torque in a specific pattern to prevent warping.
7. Refilling with Coolant: The cooling system is refilled with the correct type and mixture of BMW-approved coolant.
8. Bleeding the Cooling System: This is a critical step. Air pockets trapped within the cooling system can cause hot spots and further overheating. The system is bled by opening specific bleed screws or by running the engine with the expansion tank cap off until all air is purged.
9. Final Checks: After refilling and bleeding, the engine is run to operating temperature. The technician will check for any leaks, monitor the coolant temperature, and ensure the cooling fans are operating correctly. A final scan of the OBD-II system might be performed to clear any temporary codes.

Tools and Expertise Required

Replacing a thermostat on a BMW 335i generally requires:

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Expertise in BMW cooling systems is highly beneficial to ensure the job is done correctly, especially the bleeding process.

Common Complications

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Warning Signs & Symptoms of a Faulty Thermostat

Recognizing the early signs of a failing thermostat on your BMW 335i is key to preventing more severe engine damage and costly repairs.

Early Detection Indicators

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Performance Impacts

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Dashboard Warning Signals

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

When to Seek Immediate Repair

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Cost-Saving Strategies for BMW 335i Thermostat Replacement

While ensuring your BMW 335i is running optimally is paramount, there are several strategies you can employ to manage the cost of a thermostat replacement.

Getting Multiple Quotes

This is perhaps the most effective way to ensure you're getting a fair price for your BMW 335i thermostat replacement. Contact at least two to three reputable repair shops (including both dealerships and trusted independent mechanics) in your area. Ask for a detailed quote that includes parts, labor, and any diagnostic fees. Comparing these quotes will give you a clear understanding of the market rate.

Best Timing for Repairs

While a failing thermostat often necessitates immediate attention, if you notice symptoms that aren't critical (like slow warm-up), you might have some flexibility.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Warranty Considerations

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

DIY Feasibility Assessment

For mechanically inclined individuals, replacing the thermostat on a BMW 335i can be a viable DIY project, potentially saving on labor costs. However, it's crucial to honestly assess your skills and the tools available.

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

FAQ Section

How much does BMW 335i Thermostat Replacement Cost?

The average cost for a BMW 335i Thermostat Replacement is between $436 and $502. This includes an estimated $168 to $212 for labor and $268 to $290 for parts. This range can vary based on your location, the specific parts used (OEM vs. aftermarket), and the repair shop you choose.

Can I drive with this problem?

Driving with a faulty thermostat, especially if it's causing overheating, is highly discouraged. An overheating engine can lead to severe and expensive damage, such as a warped cylinder head or a blown head gasket. If the thermostat is stuck open, it might be drivable for short distances, but performance and fuel efficiency will be compromised, and you risk further issues. It's best to address the issue promptly.

How long does BMW 335i Thermostat Replacement take?

The labor time for a BMW 335i thermostat replacement typically ranges from 1.5 to 3 hours. This estimate includes draining the coolant, removing the old thermostat, installing the new one, refilling, and bleeding the cooling system. The exact time can depend on the accessibility of the thermostat housing and the technician's familiarity with the model.

What causes this issue?

A faulty thermostat in a BMW 335i can be caused by several factors:

• OEM Parts: These are parts manufactured by BMW or by a supplier to BMW's exact specifications. They are generally of higher quality, designed for a perfect fit, and come with a manufacturer's warranty. However, they are usually the more expensive option. For a BMW 335i thermostat replacement, expect OEM parts to be at the higher end of the $268-$290 range.
• Aftermarket Parts: These parts are made by companies other than BMW. While some aftermarket parts are excellent and can be a more budget-friendly choice, quality can vary significantly. It's advisable to research reputable aftermarket brands known for their quality and durability. Aftermarket thermostats can sometimes be found at the lower end of the parts cost range, potentially saving you money.

Next Steps:

If you suspect your BMW 335i's thermostat is failing, it's recommended to have it inspected by a qualified mechanic as soon as possible. Obtain multiple quotes, consider your warranty options, and be prepared for potential related repairs to ensure your cooling system operates at its best.