A suspension knock is more than an annoyance; it changes how your Acura feels on the road. Every bump or driveway entry becomes a reminder that something is loose, worn, or failing. For drivers of the TLX and MDX, that sound can start quietly and become more noticeable over weeks or months. At Fremont Foreign Auto in Fremont, we isolate the source of the noise with targeted testing, then restore the suspension so the ride feels tight and controlled again.
Where the Knock Begins in the TLX and MDX
The Acura TLX and MDX share suspension designs that combine struts, control arms, sway bars, and bushings to balance comfort and handling. In 2015–2020 TLX models, front lower control arm bushings can develop internal cracking, allowing the arm to shift under load. This movement causes a dull knock when hitting small road imperfections. In the 2014–2022 MDX, worn stabilizer bar links are common, especially in vehicles that have carried heavier loads or been driven on rougher surfaces. Our inspections check these components for free play, cracked boots, and signs of metal-to-metal contact.
The Role of Struts and Mounts in Noise Creation
A strut assembly does more than absorb bumps; it also locates the suspension geometry. When the internal valving wears or the strut mount bearing degrades, the result can be a repetitive knock over uneven pavement. In the MDX, the upper strut mounts can develop excessive play, especially in higher-mileage vehicles, creating a sharp clunk when the steering is turned. We test mounts by applying steering input under static load and listening for movement within the mount housing.
Ball Joints and Their Effect on Steering Precision
Lower ball joints act as pivot points between the control arm and the steering knuckle. On 2016–2021 TLX models, a ball joint with worn internals can allow vertical movement that produces a knock each time the suspension compresses. This play also impacts steering precision, making the vehicle feel less responsive. We use pry bar testing and dial indicators to measure any excess clearance, replacing ball joints that fail to meet Acura’s tight tolerance specifications.
Bushing Wear and Chassis Flex
Bushings are the cushioning interface between suspension components and the chassis. In the MDX rear suspension, trailing arm bushings can degrade, causing a hollow-sounding knock when transitioning from acceleration to braking. The rubber may look intact at first glance, so we apply a suspension load and inspect for hairline separations or deformation. Replacing these bushings restores both noise isolation and the proper alignment angles critical for tire wear.
Why Noise Diagnosis Requires a Methodical Process
A suspension knock can originate from multiple locations, and replacing parts without confirming the source leads to wasted time and money. We begin by road testing under varied conditions, noting when and how the sound appears. After lifting the vehicle, we check torque on all major suspension fasteners, inspect each joint and bushing for wear, and test for play at each wheel position. This process ensures that we identify the exact fault instead of guessing.
Repairing for Long-Term Results
Replacing a worn link or bushing solves the noise, but a complete repair considers the entire system. When we replace a stabilizer link, we inspect the opposite side and the bar bushings for wear. When replacing control arms, we verify torque at ride height to prevent premature bushing failure. Every fastener is tightened to Acura’s specifications, and every replaced component is matched to the original design for fit and durability.
Preventing Suspension Knocking in the Future
Regular inspections catch early wear before it becomes a pronounced knock. We recommend having the suspension checked during tire rotations or alignments, particularly for Union City drivers who frequently encounter speed bumps, construction zones, or rough pavement. Lubricating moving joints where applicable and replacing damaged dust boots also extends the life of suspension components.
Why Union City Acura Owners Choose Fremont Foreign Auto
Our technicians work with Acura suspension systems regularly, and we know the subtle differences between model years and trim levels. We follow factory repair procedures, use quality parts, and verify each repair with a post-service road test. This attention to detail is why Union City drivers trust us to restore quiet, precise handling to their TLX or MDX.
Address the Knock Before It Gets Worse
A suspension knock will not fade away with time. Fremont Foreign Auto can pinpoint the cause, repair it with precision, and return your Acura to the smooth, controlled ride it was built to deliver. Call us today at (510) 793-6067 to schedule your suspension inspection and eliminate the knock for good
