KYB Suspension Coil Spring - Rear
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Product Information
Full details
This KYB RA5256 Coil Spring is designed for owners of specific Mercedes-Benz GLA-Class (X156) models, particularly the GLA 250 4-matic (156.946) manufactured between December 2013 and December 2019, and equipped with sports suspension. It offers a direct replacement for the rear axle suspension spring, aiming to restore original ride comfort and handling. A key benefit is its OE-quality manufacturing by KYB, a global leader in suspension components. One caveat is its specific fitment, requiring verification of vehicle model and year, and ensuring the presence of sports suspension.
All features
| Model Part Number | RA5256 |
|---|---|
| Brand | KYB |
Extended Product Information
FAQs
What vehicles is the KYB RA5256 coil spring compatible with?
This coil spring is designed for the rear axle of Mercedes-Benz GLA-Class (X156) models, specifically the GLA 250 4-matic (156.946) produced from December 2013 to December 2019, that are equipped with sports suspension.
Is this a direct replacement part?
Yes, the KYB RA5256 is designed as a direct OE-quality replacement for the original rear coil spring on compatible Mercedes-Benz models.
Do I need to replace both rear coil springs?
It is generally recommended to replace coil springs in pairs (both left and right rear) to ensure balanced suspension performance and prevent uneven ride height or handling characteristics.
What is the 'K-Flex' designation?
K-Flex is KYB's designation for specific spring designs that often emphasize durability and performance characteristics tailored for suspension applications.
Can I install this myself?
Installation requires specialized tools like spring compressors and a good understanding of automotive suspension. It is strongly recommended to have this part installed by a qualified professional mechanic for safety and proper fitment.
What are the dimensions of the spring?
The KYB RA5256 has a length of 249 mm and an outer diameter of 127 mm.
What OEM part numbers does this replace?
This KYB coil spring is compatible with OEM references MERCEDES-BENZ 2463243104 and A2463243104.
Troubleshooting
Vehicle still sags after replacement
Ensure the correct spring (RA5256) was installed and that it is seated properly. Verify the vehicle has sports suspension. If the issue persists, the other rear spring may also need replacement, or there could be an issue with the shock absorber or mounting points.
Unusual noises from the rear suspension
Check that the coil spring is correctly seated in its perches and that any protective isolators are in place. Ensure all suspension components were torqued to specification during installation. Loose mounting hardware or worn shock absorbers can also cause noise.
Vehicle handling feels off or unstable
Confirm the spring was installed on the correct side (if applicable, though typically rear springs are symmetrical) and is fully seated. Re-check torque specifications for all related suspension components. A faulty shock absorber or alignment issues could also contribute to poor handling.
Pros and Cons
Pros
- Direct fit for specified Mercedes-Benz GLA-Class models with sports suspension.
- Manufactured by KYB, a reputable global OE supplier.
- Helps restore original rear suspension performance and ride comfort.
- Durable construction designed for longevity.
- Meets precise specifications for reliable integration.
Cons
- Specific vehicle and suspension type compatibility required.
- Not a performance upgrade part; intended as a replacement.
- Installation requires specialized tools and automotive knowledge.
Setup, Compatibility & Care
Compatibility Verification: Before installation, confirm that your vehicle is a Mercedes-Benz GLA-Class (X156) GLA 250 4-matic (156.946) manufactured between December 2013 and December 2019, and importantly, that it is equipped with sports suspension. Cross-reference the part number RA5256 with the original equipment manufacturer (OEM) part numbers MERCEDES-BENZ 2463243104 or A2463243104 if possible.
Installation: Installation of rear coil springs is a complex procedure that requires specialized tools, such as spring compressors, and a strong understanding of automotive suspension systems. It is highly recommended that this part be installed by a qualified mechanic. The process typically involves lifting the vehicle, safely removing the rear wheel, carefully decompressing the old spring, removing it, installing the new spring, and then reassembling the suspension components. Always follow manufacturer safety guidelines.
Care: Coil springs are generally maintenance-free. However, regular visual inspections of the suspension system during routine maintenance are advisable. Check for any signs of corrosion, damage, or abnormal wear on the springs and surrounding components. Ensure the protective coatings, if any, remain intact.