Part number 00499073-3862 is the steel base-mount sub-frame for the Volkswagen Golf Mk3, covering the 1991 to 1997 production run. It replaces the standard seat runners and accepts base-mount sport seats using the 345mm x 271mm bolt pattern from Sparco, OMP, or Corbeau.
The base part number here is 00499073, distinct from the 00499070 used on the Mk6 and the related Seat and Skoda platforms. The Mk3’s floor geometry and rail positions are different enough from the later Golf generations to require their own frame. Fitting a Mk6 sub-frame to a Mk3 will not align correctly.
Both driver and passenger sided versions are listed for RHD cars. This listing covers one sub-frame. Two orders needed for a full car fit.
The Golf Mk3 GTI and VR6 remain popular in classic track days and some historic motorsport categories. For a car of this age, checking that the four floor mounting points are solid before building is worthwhile. The sub-frame loads all driver weight through those four original bolts, and corroded or weakened mounting points are worth addressing before the seat goes in.
Fore-aft adjustment can be added via Sparco sliding runners if needed. At £72.50, this is the lower-priced end of the sub-frame range, which reflects the simpler geometry of the Mk3 floor plan.
Have you written anything about this exact product?
Yes, we have covered this exact product: Top 5 reclining seat choices for your Volkswagen Golf Mk6, including our fitting guide, and Top 5 reclining seat choices for your Volkswagen Golf Mk5, including our fitting guide. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is made for the Volkswagen Golf Mk3. Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
It takes seats drilled 345mm x 271mm (the Sparco and OMP seat pattern). The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Sparco frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Base mount or side mount, and does it matter?
This is a base-mount frame: the seat bolts down through its base, the simpler stack that suits seats with a flat bottom and keeps the install low-fuss. Our guide on base mount versus side mount explains the whole fitting stack.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.
