Symptoms
Weak airflow or musty smell. Note: one owner found almost no cabin heat in 15°F weather with the filter removed.
The fix, step by step
- On a left-hand-drive truck, slide the passenger seat back and recline it, then lie on your back in the footwell with a headlamp.
- Unsnap the two side clips under the filter frame, let the hinged plate swing down, pull the filter out (a curved pick helps), and fit the new one with the airflow arrow toward the cabin.
- Snap it shut.
- The glovebox stays in place.
Tools & part numbers
- Headlamp
- curved pick
- cardboard to lie on
- OEM INEOS #100326881, or Microguard 3692 reported to fit (no charcoal layer); Mann CUK25001 reported not to fit
Where to buy the parts
Microguard 3692 cabin air filter (owner-reported fit, no charcoal layer)Amazon (search) ↗
OEM INEOS cabin filter #100326881INEOS Grenadier service centre ↗
Hunting a used or discontinued part? Search eBay Motors for Ineos Grenadier Station Wagon parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.