Land Rover Discovery Exhaust System: Specs, Fitment & Common Faults
On the Discovery, a professional DPF clean on related models has genuinely been documented as only a temporary fix, worth understanding the motorway-speed requirement for a full regen cycle.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — Rear silencer (aftermarket) Bosal 211-403 / Walker 22664
| Rear silencer (back box) — aftermarket | identical to Defender list: Bosal 211-403, 211-393, 211-395; Walker 22664, 21915; MTS 01.60357, 01.96250, 01.96500; Vegaz MOS-116, MOS-115, MOS-206; Polmo 53.12, 53.03, 53.01, 53.10, 53.08; Izawit 44.001; ASSO 42.7040 |
|---|---|
| Centre / intermediate silencer — aftermarket | Vegaz MOS-84 (750 mm), MOS-159IMA (centre, 1075 mm), MOS-209 (800 mm); Bosal/Walker/IMASAF logos only |
| Front pipe / catalytic converter (DPF on diesels) — aftermarket | Vegaz MOK-949 (Euro 6), MOK-806 (Euro 5), MOK-933, MOK-913, MOK-909; BM Catalysts BM80781H (Euro 6), BM91108H, BM90440H, BM90529H, BM91391H; JMJ 1080321 (448DT), 1080388, 1080164 (M47), 1091544; Bosal 099-758 (Euro 2); NAP CAK11273. |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine parts against your VIN |
| Fitment notes | Match engine code, fuel and emissions standard. |
Land Rover Discovery Exhaust System: The Part That Announces Its Own Problems
On the Land Rover Discovery, this is one part where you'll usually hear the fault before you see it — a rattle, a drone, a sudden increase in noise that wasn't there last week. That's actually useful, since it gives you a head start on catching problems early.
Land Rover Discovery Exhaust System: What It Does
The Land Rover Discovery's exhaust system channels burnt gases away from the engine, reduces noise through the silencer, and treats emissions through a catalytic converter and particulate filter before gases exit the tailpipe. Petrol and diesel versions often use entirely different systems due to different emissions treatment requirements.
Land Rover Discovery Exhaust System: Watch: Replacing It
aftermarket exhaust fitting; Discovery 5 specific video not found
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A Genuinely Useful Piece of Context Worth Knowing About DPF Regeneration — Land Rover Discovery Exhaust System
If you're facing a persistent DPF warning, this is genuinely worth knowing: documented cases on related Land Rover models describe a professional DPF clean only providing a temporary fix, with the red warning light returning within weeks on some cars, worth asking what's causing repeated blockages rather than accepting repeated cleans as a permanent solution.
It's also genuinely worth knowing that on diesel models fitted with AdBlue, topping off the fluid tank every two to three tanks of fuel, rather than waiting for a low-level warning, can help avoid the fluid crystallising at very low levels.
Land Rover Discovery Exhaust System: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Exhaust System Guide for warning signs and fault codes to watch for, confirming fitment against your VIN, and which aftermarket brands are worth trusting.
More Land Rover Exhaust System
The same part, covered across other Land Rover models.