2017-2022 Encore & Trax Upper Radiator Support Tie Bar: Diagnosing Noises and Misalignment
This guide covers the common failure symptoms, replacement costs, and inspection points for the front upper radiator support on the 2017-2022 Buick Encore and Chevrolet Trax.
- This part serves a dual purpose: it holds the radiator and provides structural alignment for the hood and headlights.
- The most common symptom of failure is physical misalignment of front body panels and difficulty closing the hood.
- Part number 42496075 is for 2017 models, while 42599080 is for 2018-2022 models.
- When buying a used part, inspect it carefully for cracks, especially around mounting points, and any signs of warping.
Symptoms of a Failing Radiator Support Bracket
Because this part is structural, signs of failure are almost always physical or audible. Damage is typically caused by a front-end collision, but stress fractures from age and vibration can also occur.
- Front-End Misalignment: This is the most common symptom. You may notice uneven gaps between the hood, fenders, grille, or headlights. The hood may also become difficult to open or close because the latch, which mounts to the support, is out of position.
- Rattling or Clunking Noises: A cracked or broken support can cause a rattling, clunking, or creaking sound from the front of the vehicle. This noise is often more noticeable when driving on bumpy roads as the loose components shift and make contact.
- Loose or Tilted Radiator: If you look under the hood, you may be able to see the radiator itself is tilted or physically loose. This is a serious issue, as it can put stress on the radiator hoses, potentially leading to coolant leaks.
- Overheating or Poor A/C Performance: In severe cases, if the support allows the radiator or A/C condenser to shift significantly, it can reduce airflow or cause damage to the cooling fins or lines. This can lead to engine overheating or a noticeable decrease in air conditioning effectiveness.
Vehicle and Part Compatibility
The Buick Encore and Chevrolet Trax from 2017 to 2022 are built on the same GM platform and share the same upper radiator support. However, there was a part number change during the production run.
| Vehicle Years | OEM Part Number | Notes |
|---|---|---|
| 2017 | 42496075 | Fits both 2017 Buick Encore and 2017 Chevrolet Trax. |
| 2018-2022 | 42599080 (replaces 42549081) | Fits 2018-2022 Buick Encore and Chevrolet Trax. Part number 42599080 is the current replacement for 42549081. |
Pro Tip: Unlike some other parts, this radiator support fits all trim levels of the Buick Encore within these years, including models with the Sport Touring package. Aftermarket parts listings also confirm this fitment.
Warning: There are no specific recalls or Technical Service Bulletins (TSBs) for a faulty radiator support on these vehicles. However, there was a recall for improperly welded front lower-control arms on some 2017-2019 Trax models, which can also cause front-end structural issues.
Buying a Used Radiator Support Bracket: What to Inspect
Since this is often a collision-damaged part, buying a used OEM support can be a great value, but careful inspection is critical. A recycled OEM part is often more durable and fits better than a cheap aftermarket alternative.
- Check for Cracks: Thoroughly inspect the entire part, especially around the mounting holes and corners where stress is highest. Pay close attention to the headlight and hood latch mounting areas.
- Look for Stress Marks: On this black plastic part, stress from an impact or bending will often appear as faint, lighter-colored or white-ish lines. This indicates the plastic has been compromised, even if it's not fully cracked.
- Verify All Tabs are Intact: The support has numerous small tabs, clips, and mounting points for wiring harnesses and other components. Ensure none of these are broken off, as this can make installation difficult.
- Confirm it is Not Warped: Lay the part on a flat surface to check for any twisting or warping. A bent support will cause significant alignment issues with the hood, fenders, and headlights.
- Ask About the Donor Vehicle: If possible, confirm the part came from a vehicle that did not sustain a major front-end collision. A part from a side or rear impact vehicle is a much safer bet.
Cost of Replacement
The cost to replace the upper radiator support can vary significantly based on the parts source and labor rates.
| Part or Service | Estimated Cost |
|---|---|
| New OEM Part | $290 - $460 |
| New Aftermarket Part | $210 - $260 |
| Used OEM Part | $125 - $225 |
| Shop Labor | $250 - $500 |
Replacement Overview & Difficulty
Replacing the upper radiator support is a moderately difficult job for a DIYer. The main challenge is the need to remove the front bumper cover 🎬 Watch how to remove the front bumper cover on a Buick Encore to access the support.
- Difficulty: 3 out of 5
- Estimated Time: 2-3 hours
- Tools Needed: Basic hand tools, including a socket set (10mm, 13mm), and a trim panel removal tool for plastic clips.
The general process involves removing the upper plastic sight shield, detaching the front bumper cover 🎬 See this step-by-step front bumper cover replacement video, unbolting several smaller brackets, and then unbolting the main upper tie bar itself. The radiator and condenser do not need to be removed, but care must be taken not to damage them during the process.
Frequently Asked Questions (FAQ)
Can I drive with a broken radiator support?
You can, but it is not recommended for long. A broken support allows the radiator and other components to vibrate and shift, which can lead to coolant hose leaks, A/C line damage, or even damage to the radiator itself, potentially leaving you stranded.
Will a bad radiator support cause the check engine light to come on?
No, a bad radiator support itself will not trigger a check engine light. However, if the movement it allows causes damage to the radiator fan or a sensor, a light could come on for that secondary failure.
Is this the same part for the Buick Encore and Chevy Trax?
Yes, for the model years 2017-2022, the Buick Encore and Chevrolet Trax use the exact same upper radiator support tie bar, though the part number is different for 2017 vs. 2018-2022 models.
Does the radiator need to be drained to replace this part?
No. The upper support can be unbolted and replaced without disconnecting any coolant hoses or draining the radiator. You will, however, need to have the A/C system's refrigerant professionally evacuated if you are replacing the condenser at the same time.
Helpful Videos
Technical Specifications
OEM Part Numbers: 42496075 42549081 42599080
Part is also known as the 'Front End Upper Tie Bar'. It is a large, single-piece plastic assembly.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Buick Encore:
- Chevrolet Trax: