
A1666821400 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $54.59 | Condition is Used, 2012-2014 MERCEDES ML350 W166 3.5L FRONT RIGHT EXHAUST HEAT SHIELD PLATE OEM, FREE SHIPPING | ![]() |
![]() | $56.00 | Top Pick! Condition is Used, Mercedes-Benz A1666821400 Right catalytic converter heat shield ML GLE W166 ..., shipping cost = $65.00 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $201.88 | Top Pick! Condition is Neu, NEW MB SHIELD A1666821400 OEM, shipping cost = $87.19 | 99.2% |
![]() | $233.53 | Top Pick! Condition is Neu, OEM MERCEDES M GL-CLASS RIGHT CATALYTIC CONVERTER HEAT SHIELD A1666821400, shipping cost = $102.30 | 97.3% |

Introducing the Mercedes-Benz W166 ML350 (2012-2014) Front Right Exhaust Heat Shield Plate with part number A166 68 21 40 00. This essential component is designed to protect the front right exhaust system of your Mercedes-Benz ML350 from the extreme heat generated during engine operation.
Crafted with superior quality materials, this heat shield plate ensures effective insulation between the engine compartment and the exhaust system. Its primary function is to maintain a safe temperature level for the surrounding components, preventing potential damage from direct contact with hot exhaust gases.
The Mercedes-Benz Front Right Exhaust Heat Shield Plate is meticulously engineered to fit perfectly in your vehicle. Its precise dimensions and contours enable a seamless installation process, ensuring a secure and reliable fit. The heat shield plate is designed with a durable finish that can withstand the rigors of daily use and exposure to various weather conditions.
This replacement heat shield plate is an excellent choice for those seeking to restore the performance and efficiency of their Mercedes-Benz ML350. If your current heat shield plate has become worn out, damaged, or is no longer effective, upgrading to a new one will help maintain the optimal operating temperature of your exhaust system and enhance the overall driving experience.
In summary, the Mercedes-Benz W166 ML350 (2012-2014) Front Right Exhaust Heat Shield Plate with part number A166 68 21 40 00 is an essential upgrade for any Mercedes-Benz ML350 owner. Its superior quality materials, precise fit, and effective heat insulation make it an indispensable component for maintaining the optimal performance and longevity of your vehicle's exhaust system.
The Mercedes ML350 W166, produced between 2012 and 2014, is a midsize luxury SUV known for its powerful 3.5-liter V6 engine. The exhaust system on this vehicle includes a heat shield plate for the front right exhaust, which can help protect the undercarriage from extreme heat. Here are some potential pros and cons of buying a replacement heat shield plate for this vehicle.
Pros:1. Protection: A heat shield plate can help protect the undercarriage of the vehicle from the extreme heat generated by the exhaust system. This can help prevent damage to other components and extend the life of the vehicle.
2. Comfort: By reducing the amount of heat that enters the cabin, a properly functioning heat shield plate can help improve the comfort of the vehicle, especially during hot weather.
3. Reduced Engine Heat: The heat shield plate can also help reduce the amount of heat that enters the engine compartment, which can help improve engine performance and longevity.
Cons:1. Cost: Replacing a heat shield plate can be an expensive repair, especially for a luxury vehicle like the Mercedes ML350. The cost of the part itself can vary, but labor costs can also add to the total cost of the repair.
2. Availability: Depending on the location and availability of the part, it may take some time to get the replacement heat shield plate installed. This can be inconvenient for those who rely on their vehicle for daily transportation.
3. Complexity: The exhaust system on the Mercedes ML350 is complex, and replacing a heat shield plate can involve removing several components to access the damaged part. This can add to the time and cost of the repair.
In conclusion, while a heat shield plate for the front right exhaust on a Mercedes ML350 W166 can offer several benefits, including protection, comfort, and reduced engine heat, the cost and availability of the part, as well as the complexity of the repair, may make it a less desirable option for some owners. Ultimately, the decision to replace the heat shield plate should be based on the individual's budget, vehicle usage, and personal preferences. If the vehicle is used frequently, particularly in hot weather, or if the undercarriage has already sustained damage, replacing the heat shield plate may be a worthwhile investment. However, if the vehicle is used infrequently or the budget is limited, other maintenance priorities may be more pressing. It's always a good idea to consult with a trusted mechanic or Mercedes dealership for personalized advice and recommendations.
Details:
Drive type: all wheel AWD / 4 mastic. Transmission: 7-speed automatic 7g-tonic. Mileage: 149k miles. Body type: sport utility 4-door SUV.
specifications heatnshield:
- for models: Ml350, W166
- for years: 2012–2014
- brand: Mercedes
- mpn: A1666821400
- vintage part: No
- type: Heat Shield
- placement on vehicle: Front, Right, Passenger
- country/region of manufacture: United States
- color: Silver
shipping heatnshield:
- class: standard
- transit: 4-7 days
- service: standard
- type: fixed
general heatnshield:
- category: Auto Parts > Car Truck Accessories > Exhaust Emission Systems > Heat Shields, Wraps Sleeves
returns heatnshield:
- policy: returns accepted
- time: 30 days
- paid by: buyer
seller heatnshield:
- city: kingsley, michigan
- # reviews: 16533
- rating: 99.4%
payments heatnshield:
- credit card: discover
- wallet: paypal
- other
offer heatnshield:
- prices: $54.59–$233.53
- item condition:
- Used
- Neu
- in stock #: 4
- started: september 18, 2025
- options: ship-to-home
- availability: in stock
- best offers: true
- sold #: 18
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