Restore the ride height and handling of your GM sedan with the KYB Strut-Plus Complete Corner Unit Assembly SR4003, a pre-assembled rear-right strut, mount and coil spring built by an original-equipment supplier. It drops in as a direct-fit replacement for the 1997-2005 Buick Century, 1997-2004 Buick Regal, 2001-2003 Chevrolet Impala, 2000-2003 Chevrolet Monte Carlo and 1997-2008 Pontiac Grand Prix — see the Buyer's Guide tab for engine-level fitment.
A strut assembly supports vehicle weight, sets ride height, acts as the steering pivot and helps control stability. This unit ships fully assembled to save labor.
- KYB Excel-G strut: stronger steel outer shell with KYB's application-specific precision damping valves.
- High-carbon steel coil spring: application-engineered to match the strut and help maintain proper ride height within OE specifications.
- Side-specific design: left and right part numbers with side-specific components, as the vehicle manufacturer intended.
- Engineered for vehicles with electronic safety systems (ESC, ABS, etc.), and assembled in the USA.
Replacing both sides of the axle together as a matched pair is recommended for balanced handling. This listing is for one corner unit.
Interchange: G56925 · 171662R
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this KYB SR4003 assembly include?
It's a Complete Corner Unit Assembly with a KYB Excel-G strut, upper mount and an application-engineered high-carbon steel coil spring, shipped pre-assembled.
Which vehicles does it fit?
It's a direct-fit replacement for the 1997-2005 Buick Century, 1997-2004 Buick Regal, 2001-2003 Chevrolet Impala, 2000-2003 Chevrolet Monte Carlo and 1997-2008 Pontiac Grand Prix. See the Buyer's Guide tab.
What position is this assembly for?
It is the rear-right corner unit. KYB uses side-specific part numbers, so confirm this position matches the corner you're servicing.
Do I need to replace both sides?
Replacing both sides of the axle together as a matched pair is recommended for balanced handling, though not required. This listing is for one corner unit.
What signs suggest a strut assembly may need replacing?
Common signs include excessive bounce, uneven ride height, clunking during acceleration or over bumps, or fluid leaking from the strut. Diagnose the cause before replacing.
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