Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If your Mercedes-Benz GLA is showing vibration, clicking while turning, or grease near the wheel hub, replacing the CV axle can restore proper handling and safety. Picking the right axle matters because fitment, joint durability, and protective boots determine how the part performs and how long it lasts in everyday driving. This guide shortlists the top options for Mercedes-Benz GLA owners and explains the criteria we used to evaluate them, including fitment accuracy and build quality. Read on for practical guidance to help you pick the best replacement axle for your vehicle.
Looking for other parts? See all Mercedes-Benz GLA parts & accessories.
Top Picks at a Glance
1. A-Premium CV Axle Shaft Assembly, Front Right Passenger Side for Mercedes-Benz GLA/CLA/B250
| Location | Front Right (Passenger Side) |
|---|---|
| ABS Ring Included | No |
| Axle Nut Included | Yes |
| Input Shaft Spline Count | 27 |
| Output Shaft Spline Count | 30 |
This A-Premium CV axle is a direct replacement front right (passenger side) half-shaft for select Mercedes‑Benz GLA250/GLA45 AMG, CLA250/CLA45 AMG, and B250 models. It transfers torque from the transmission/differential to the wheel and is supplied with an axle nut but no ABS tone ring. Typical use is as a factory-style repair part when a worn or torn CV joint or shaft needs replacement. Notable specs from the listing include spline counts and a compressed length that match factory fitment, and the unit arrives ready to install on compatible models. The main practical benefit is quick restoration of driveline function and smooth power delivery without needing a custom rebuild. Limitations to consider are the lack of an ABS ring on this unit and the need to confirm spline and length match your specific chassis before purchase. The manufacturer offers a one-year unlimited-mileage guarantee, but buyers should verify fitment for their exact model year and suspension variant prior to installation.
Best for: Balanced all-round Mercedes owners who want a straightforward, factory-style replacement to restore drivability without sourcing rebuilt components or custom parts.
Less Ideal for: Do not choose this if your vehicle requires an ABS ring on the axle or if you prefer a rebuilt OEM-sourced unit with documented factory provenance.
- Direct-fit replacement engineered for Mercedes‑Benz GLA/CLA/B250 front right applications
- Includes axle nut so the assembly is ready for installation
- Factory-style spline counts and compressed length to match drivetrain engagement
- Backed by a one-year unlimited-mileage guarantee from the brand
- Does not include an ABS tone ring which may be required on some chassis variants
- Buyer must confirm exact spline count and length for their model to ensure correct fit
Verdict: A-Premium provides a ready-to-install front right CV axle built to match Mercedes‑Benz fitment for a reliable, practical factory-style replacement.
2. A-Premium Pair Rear CV Axle Shaft Assembly for Infiniti QX30 and Mercedes-Benz GLA/CLA (Driver & Passenger)
| Vehicle fitment | Infiniti QX30 2017-2019; Mercedes-Benz CLA250 2014-2019; GLA250 2015-2020 |
|---|---|
| Location | Rear Left and Right |
| ABS ring | Without ABS Ring |
| Axle nut | Included |
| Input spline count | 22 |
This A-Premium pair of rear CV axle shaft assemblies replaces the left and right half-shafts on compatible Infiniti QX30 and Mercedes-Benz CLA/GLA models and is intended for direct drivetrain restoration. Each shaft transfers torque from the differential to the wheel and arrives with axle nuts included while ABS tone rings are not fitted. The listing gives spline counts and compressed lengths for left and right shafts so fitment checks are straightforward for installation. For a performance-oriented buyer, these shafts restore driveline engagement and reduce vibration or clunking from worn CVs when installed correctly. The product comes with a one-year unlimited-mileage guarantee which provides extra assurance for higher-mileage use. Limitations include the lack of integrated ABS rings which may require reuse of the vehicle�s original rings or separate purchase, and the need to verify exact reference numbers and measurements against the vehicle before ordering to avoid fitment issues.
Best for: Performance-oriented owners focused on restoring drivetrain feel and reducing noise who prioritize a matched-pair, vehicle-specific shaft replacement for Mercedes-Benz GLA and similar models.
Less Ideal for: Buyers who need a direct swap with built-in ABS rings or who prefer an exact factory replica that includes every OE component should consider alternatives.
- Includes both driver and passenger rear shaft assemblies for a matched pair replacement
- Axle nuts included so fewer separate parts are needed for installation
- Manufacturer provides a one-year unlimited-mileage guarantee
- Provides vehicle-specific spline counts and compressed lengths to verify fitment prior to purchase
- Ships without ABS tone rings which may require reusing original rings or buying separate parts
- Compressed lengths differ between left and right shafts so precise measurement is necessary to confirm compatibility
Verdict: A matched pair of vehicle-specific rear CV axle shafts that restore driveline engagement for Mercedes-Benz GLA/CLA and Infiniti QX30 models while offering a one-year unlimited-mileage guarantee.
3. GSP NCV48063 CV Axle Shaft Assembly – Front Left Driver Side
| Manufacturer | GSP North America |
|---|---|
| Model | NCV48063 |
| Exterior | Machined |
| OEM Part Number | 15050N 242 330 01 00 246 330 12 01 246 330 18 01 246 330 92 00 800982 MB-8046 N/C TN11045 |
This GSP NCV48063 CV axle is a direct-fit front left half-shaft intended as a factory-quality replacement for select Mercedes-Benz CLA250/CLA45 AMG and GLA250/GLA45 AMG models. It arrives pre-lubricated with high-temperature moly grease and includes a neoprene boot and ABS sensor ring installed, so installation is straightforward and it works with vehicles equipped with ABS without extra parts. The axle is machined and balanced to minimize vibration and is inspected before shipping, which helps restore smooth drivability after a failing axle or torn boot. Its neoprene boots are claimed to resist abrasion and extreme temperatures, reducing the common failure mode of boot splits that let grease escape. Limitations to keep in mind are that fitment depends on specific trim, engine, and drivetrain configurations so you must confirm compatibility, and while GSP offers a limited lifetime warranty, long-term durability can vary with driving conditions and maintenance. For practical repairs this axle offers a mostly complete, ready-to-install replacement that removes the need to reuse old components.
Best for: Practical optimizers who want a near-OEM replacement that minimizes downtime and re-use of old parts while keeping repair costs reasonable.
Less Ideal for: Buyers who need a part explicitly certified for heavy-duty or performance driving or those unwilling to verify exact fitment for their specific GLA configuration.
- Direct-fit replacement engineered for factory-fit and balance to reduce vibration
- Pre-lubricated with high-temperature moly grease for immediate installation and wear resistance
- Premium-grade neoprene boots for improved abrasion and temperature resistance
- Includes ABS sensor ring installed for compatibility with ABS-equipped vehicles
- Fitment varies by trim, engine, and drivetrain so vehicle-specific verification is required
- Limited lifetime warranty terms are not fully detailed on the product page
Verdict: A ready-to-install, factory-quality front left CV axle that restores smooth driveline operation for select Mercedes-Benz GLA/CLA models at a budget-friendly value.
4. BuyAutoParts Front Right CV Axle Shaft for Mercedes CLA/GLA (90-04920N)
| Fits | 2014-2018 CLA250 & CLA45; 2015-2019 GLA250 & GLA45 |
|---|---|
| Position | Front right passenger side |
| Quality standard | ISO/TS 16949 |
| Assembly | Fully assembled and balanced |
This BuyAutoParts front right CV axle is a direct-fit replacement designed for 2014–2018 CLA250 and CLA45 and 2015–2019 GLA250 and GLA45 models. It ships fully assembled and balanced so installation is straightforward for a mechanic or experienced DIYer replacing a worn or damaged passenger-side axle. The unit is built to ISO/TS 16949 quality standards and the listing emphasizes OEM-style fit and finish and factory-like packaging to reduce the chance of transit damage. Practical benefits include arriving ready to install with no core charge and claimed durability from factory-style engineering. Limitations to note are mixed user feedback about fitment accuracy and a small number of buyers reporting sizing problems, so confirm OE reference numbers and vehicle fitment before ordering; professional verification at installation is recommended if there is any doubt. This axle is a value-focused option when you need a lower-cost factory-replacement part for covered Mercedes models.
Best for: Budget-conscious Mercedes owners seeking a lower-cost, factory-style replacement CV axle who prioritize upfront savings and straightforward installation over premium brand assurance.
Less Ideal for: Owners who want brand-new OEM parts backed by extensive track records or those uncomfortable verifying fitment details should consider dealer or premium aftermarket alternatives.
- Direct-fit passenger-side front axle for specified Mercedes CLA/GLA models
- Arrives fully assembled and balanced for easier installation
- Manufactured to ISO/TS 16949 quality standards
- No core deposit required and packaged to reduce transit damage
- Some customer reports of incorrect fitment for advertised models
- Limited customer feedback available to verify long-term durability
Verdict: A cost-focused, factory-fit replacement CV axle for specified Mercedes CLA and GLA models that arrives ready to install.
5. A-Premium Front Left CV Axle Shaft Assembly for Mercedes-Benz CLA/GLA (Driver Side)
| Location | Front Left (Driver Side) |
|---|---|
| Axle Nut Included | Yes |
| ABS Ring Included | No |
| Input Shaft Spline Count | 27 |
| Output Shaft Spline Count | 30 |
This A-Premium CV axle is a direct-replacement front left (driver side) half-shaft for select Mercedes-Benz CLA250/CLA45 AMG (2014–2019) and GLA250/GLA45 AMG (2015–2020) models. It transfers drive torque from the transmission/differential to the wheel and is supplied with the axle nut but without an ABS ring. Typical use is as a service replacement when a worn boot, clicking in turns, or vibration indicates a failing CV joint. Notable features from the listing include vehicle-specific fitment, a 27-input/30-output spline count, and a compressed length stated for installers. The practical benefits are straightforward: it arrives ready to install on compatible cars with factory-style fit where the ABS tone ring is not required, and the one-year unlimited-mileage guarantee gives added confidence for reliability-focused buyers. Limitations to note are the missing ABS ring which may require sourcing separately for ABS-equipped variants and the need to verify spline counts and fitment against your exact VIN before ordering to ensure proper engagement and axle nut compatibility.
Best for: Reliability-focused owners who prioritize a dependable, ready-to-install replacement shaft that restores driveline smoothness and reduces the risk of repeat failures.
Less Ideal for: Buyers who need a CV axle with an integrated ABS ring or those who prefer dealer-sourced factory parts should consider alternative options.
- Vehicle-specific fitment for Mercedes-Benz CLA and GLA front left positions
- Includes axle nut for straightforward installation
- Clear spline counts and compressed length listed to confirm fit for installers
- One-year unlimited-mileage guarantee for added reliability assurance
- Does not include an ABS tone ring which may be required on some vehicles
Verdict: A-Premium delivers a vehicle-specific, install-ready front left CV axle aimed at restoring reliable drivability on compatible Mercedes-Benz CLA and GLA models.
6. AUTO DN Front Left CV Axle Assembly for Mercedes-Benz GLA/CLA (Driver Side)
| Brand | AUTO DN |
|---|---|
| Item model number | AZ230512070090 |
| Exterior | Painted |
| Manufacturer Part Number | AZ230512070090 |
This AUTO DN front left CV axle assembly is a direct-replacement drive shaft intended for Mercedes‑Benz GLA250, GLA45 AMG, CLA250 and CLA45 AMG model years listed in the fitment. It transfers engine torque to the front wheel while allowing for steering and suspension travel, and is used when the original axle shows clicking, vibration, or grease leakage. The listing emphasizes forged alloy steel construction and heat treatment for wear and fatigue resistance, and the constant velocity joint is designed for smooth, quiet operation during acceleration and cornering. For a convenience-focused buyer this part offers a ready-made swap that avoids rebuilding a worn joint and simplifies DIY or shop installation. Important limitations are that fitment must be confirmed for your exact year and configuration and that installation may require a shop manual or professional mechanic if you lack experience. The product comes painted and includes factory-style mounting details but does not list a warranty or detailed installation hardware in the description.
Best for: Convenience-driven buyers who want a ready-to-install replacement part to get a Mercedes‑Benz GLA or CLA back on the road quickly without sourcing multiple components.
Less Ideal for: Shoppers who need guaranteed OEM warranty coverage or who plan to reuse existing inner components should consider dealer parts or a custom rebuild instead.
- Direct-replacement assembly simplifies installation compared with rebuilding a CV joint
- Forged alloy steel construction with heat treatment for improved wear and fatigue resistance
- Designed for smooth, quiet constant velocity operation to reduce vibration and noise during cornering
- Fitment must be verified for specific model years and configurations before purchase
- No explicit warranty or detailed installation hardware listed in the product details
Verdict: A ready-to-install front left CV axle built to be a straightforward replacement for compatible Mercedes‑Benz GLA and CLA models.
7. EXPEDE Front CV Axle Shaft Assembly Set for Mercedes-Benz CLA/GLA (Front Left & Right)
| Manufacturer | EXPEDE |
|---|---|
| Manufacturer Part Number | FL-B2CVE07-AF-XY |
| OEM Part Number | NCV48063; NCV48064 |
This EXPEDE kit supplies both left and right front CV axle assemblies intended as direct replacements for compatible Mercedes‑Benz CLA and GLA models. The axles come pre-assembled with neoprene boots, moly grease, stainless steel clamps, and heat-treated ball tracks so they are ready to install after vehicle-specific verification. In practice these axles restore driveline function, resolve clicking or vibration from worn CV joints, and are used when the original shafts have torn boots or failed joints. The listing emphasizes application-specific splines and threads for a secure fit and individual straightness checks to reduce vibration at speed. Many buyers report straightforward installation and immediate drivability improvements, though a few note length/fit differences on nonlisted vehicles and the usual need to confirm fitment against the vehicle's OEM part numbers. For a risk-averse buyer targeting Mercedes‑Benz GLA models, the kit balances factory-style components and practical corrosion-resistant clamps with the caveat to double-check compatibility before ordering.
Best for: Buyers who prioritize minimizing risk and want a near‑factory style replacement that restores drivability on Mercedes‑Benz GLA models while avoiding aftermarket experiments.
Less Ideal for: People seeking a guaranteed plug‑and‑play factory unit backed by documented warranty support or those unwilling to verify OEM compatibility before installation.
- Includes both driver and passenger front axle assemblies for a complete front axle replacement.
- Neoprene boots and high-temperature moly grease intended to withstand heat and torque demands.
- Stainless steel clamps and heat-treated ball tracks for improved corrosion resistance and durability.
- Each axle verified for straightness to help prevent vibration at highway speeds.
- Fitment must be confirmed against OEM part numbers because some users reported length or compatibility differences.
- No warranty information is provided in the listed product details.
- Not explicitly matched to a single GLA trim in the listing text, requiring buyer diligence to ensure exact fit.
Verdict: A practical, factory-style pair of front CV axles for Mercedes‑Benz GLA owners who want a straightforward replacement but should double-check OEM fitment before buying.
Choosing the Right Mercedes-Benz GLA CV Axle: Key Factors to Consider
Exact Fitment and Spline Count
Correct fitment is essential because an axle that does not match the GLA's splines or flange pattern will not install properly or may accelerate wear. Confirming the axle matches the vehicle's model year, drivetrain layout, and wheel hub specifications reduces the chance of additional labor or rework. Mismatched splines or incorrect flange dimensions can lead to vibration or premature failure. Use documented fitment data and vehicle-specific part numbers where available to ensure compatibility before purchase.
CV Joint Construction
The design and materials used in the CV joint determine how well it handles steering angles and torque loads. Joints with hardened races and quality bearings generally tolerate repeated articulation without developing play that causes clicking or looseness. Stronger joint construction also resists heat and wear from repeated flexing, which is important for vehicles that see stop-and-go city driving or frequent turns.
Boot Material and Seal Quality
Boots protect the joint from dirt and moisture; durable boot material and secure seals prevent grease loss and contamination that lead to failure. Look for boots made from high-grade rubber or thermoplastic elastomers and secure, crimped or clampped seals that maintain pressure and keep contaminants out. A torn or poorly sealed boot is a common failure point, so prioritize options with robust boot designs and positive sealing methods.
Shaft Strength and Corrosion Resistance
The axle shaft must resist bending and torsional stress while remaining light enough to avoid adding unsprung weight. High-strength steel and corrosion-resistant coatings extend service life, especially in regions with road salt or high humidity. A shaft that resists corrosion maintains balance and prevents pitting, which could otherwise lead to vibration at highway speeds or structural weakness over time.
Pre-Greasing and Maintenance Requirements
Axles that come pre-greased with appropriate CV joint lubricant reduce installation time and help ensure proper lubrication from the start. Check whether the axle requires additional greasing during installation and whether the kit includes the correct grease and clamps. Lower maintenance needs and clear installation instructions reduce the chance of improper assembly, which can shorten component life.
Warranty and Documentation
A clear warranty and thorough documentation indicate manufacturer confidence and make it easier to verify fitment and installation steps. Warranties that cover defects in materials and workmanship provide recourse if an axle fails prematurely under normal use. Documentation should include fitment lists, installation notes, and torque specifications to support correct installation and long-term reliability.
How We Chose the Best Mercedes-Benz GLA CV Axle
We focused on components built specifically to fit the Mercedes-Benz GLA and evaluated each option across several concrete, vehicle-relevant criteria. Primary filters included exact fitment to the GLA chassis and model years, verified splines and flange dimensions, and compatibility with factory suspension geometry. We also assessed CV joint construction and boot material to judge long-term durability under typical driving loads. Additional criteria covered shaft strength and corrosion resistance, presence of pre-greased joints or premium grease types, and the quality of seals and clamps that prevent contamination. We excluded universal or generic axles that require modification, as well as parts without documentation confirming vehicle-specific fit. The result is a focused list of axles that meet practical reliability and fitment expectations for Mercedes-Benz GLA owners.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common symptoms of a failing CV axle on a Mercedes-Benz GLA?
Common signs include a rhythmic vibration during acceleration, a clicking or popping noise when turning, and visible grease near the wheel hub or along the inner fender. These symptoms often indicate worn joints or a torn boot and usually worsen over time if left unaddressed.
Can I replace a CV axle myself on a Mercedes-Benz GLA?
Many mechanically inclined owners can replace a CV axle with standard tools, a jack, and torque wrench, but the job requires proper lift points and torque specifications. If you are unfamiliar with suspension work or lack a safe workspace, professional installation reduces the risk of improper fitment or injury.
How long do CV axles typically last on vehicles like the GLA?
Lifespan varies widely depending on driving conditions and maintenance, but well-made axles with intact boots often last many years. Exposure to rough roads, contaminants, or torn boots can shorten service life, so regular inspections help catch issues early.
What causes axle vibration at highway speed after a replacement?
Vibration after replacement can stem from improper installation, incorrect spline engagement, an unbalanced shaft, or damaged wheel bearings and tires. Verify that the axle is fully seated, the axle nut and hub are torqued to spec, and that other drivetrain components are in good condition.
Is a torn CV joint boot an emergency repair?
A torn boot is not always an immediate emergency, but it allows grease to escape and contaminants to enter, which accelerates joint wear. Address a torn boot promptly to avoid more extensive joint damage and a likely need for full axle replacement.
How can I tell if I need a half shaft replacement versus a joint repair?
If the joint itself is accessible and the boot damage is recent with little contamination, a joint rebuild or boot replacement may be possible. However, when there is significant play, heavy wear, or internal contamination, replacing the entire half shaft is usually more reliable and cost-effective in the long run.
Conclusion
When replacing a Mercedes-Benz GLA CV axle, prioritize correct fitment, joint durability, and a robust boot and seal system. These factors have the biggest impact on long-term performance and help prevent common failure modes like grease loss and clicking noises. Balance shaft strength and corrosion resistance with clear installation documentation and reasonable warranty coverage. Doing so reduces the chance of repeat repairs and helps restore smooth steering and reduced vibration.
Explore More:
- Check out all Mercedes-Benz GLA parts & accessories
- Explore Transmission & Drivetrain
- Browse all Auto Parts
