DPF Cleaning vs Replacement Costs

A blocked diesel particulate filter (DPF) is one of the most expensive issues a diesel driver can face. When the warning light appears, you’re left with a choice: clean the existing filter or replace it. The cost difference is huge (see below), and understanding your options could save you hundreds or even thousands of pounds. This guide breaks down the true costs of cleaning versus replacement, and why professional DPF cleaning is usually the smarter choice.

Why Does the DPF Block?

Your DPF is designed to trap soot and burn it off during regeneration. If regeneration fails—because of short journeys, sensor faults, or engine issues—soot builds up until the filter clogs. Once blocked, back-pressure rises, performance drops, and the car may enter limp mode. Many drivers assume replacement is the only fix, but that isn’t always the case.

DPF Replacement Costs

Replacing a DPF is expensive. Genuine (OEM) filters for modern diesel cars and vans typically cost £1,000–£3,500 (not an actual quote but a guide), depending on make and model. Labour costs add even more, especially if the unit is difficult to access. Cheaper aftermarket filters are available for £300–£600 (not an actual quote but a guide), but these rarely last—often causing the same problem again within months. Without addressing the root cause of the blockage, even a brand-new filter can quickly fail.

DPF Cleaning Costs

Cleaning your existing filter is a fraction of the price. Professional on-car DPF cleaning typically costs £150–£350 (not an actual quote but a guide), depending on vehicle and blockage level. Off-car and postal DPF cleaning services range from £180–£400 (not an actual quote but a guide), offering a more thorough clean for severely blocked filters. All prices are guides—always request a personalised quote for your vehicle and situation.

Learn more: Full DPF Cleaning Cost Guide

Cost Comparison: Cleaning vs Replacement

• On-Car DPF Cleaning: £150–£350 (not an actual quote but a guide)
• Off-Car/Postal DPF Cleaning: £180–£400 (not an actual quote but a guide)
• Replacement (OEM): £1,000–£3,500 (not an actual quote but a guide) plus labour
• Replacement (Aftermarket): £300–£600 (not an actual quote but a guide) plus labour (shorter lifespan)

Clearly, cleaning is the most cost-effective solution in the majority of cases. Unless the filter is physically damaged or melted, professional cleaning can restore it to near-new condition for a fraction of the cost.

When Cleaning Isn’t Enough

There are times when cleaning isn’t possible. If the ceramic substrate has melted, cracked, or collapsed, replacement is the only option. Similarly, if the filter has been contaminated with engine oil or coolant, cleaning will not restore full function. That’s why proper diagnosis is key. A reputable provider will inspect the filter and check for underlying faults before recommending the right approach.

Hidden Costs of Replacement

It’s not just the price of the new filter. Replacing a DPF often means new sensors, clamps, and fitting costs. If the cause of the blockage (such as a faulty injector or EGR valve) isn’t repaired, the replacement can fail within weeks. That’s money wasted. With cleaning, you can often combine the service with engine carbon cleaning or EGR cleaning to prevent repeat problems, making it better value in the long run.

Why Professional Cleaning Pays Off

DIY cleaning additives and roadside “quick fixes” rarely work on a fully blocked filter. They can dilute soot but rarely remove ash deposits. Professional cleaning uses specialist equipment and chemicals to flush the filter completely. You also get before-and-after flow data, so you know the filter is restored to proper function.

Our Recommendation

If your DPF light comes on, don’t rush into a costly replacement. Book a professional clean first. In 90% of cases, the filter can be restored for a fraction of the cost (not an actual quote but a guide). Only if the filter is physically damaged should you consider replacement.

FAQs

How do I know if my DPF needs cleaning or replacing?

A diagnostic check will confirm if the filter is blocked with soot or damaged. If the core is intact, cleaning is possible and much cheaper (not an actual quote but a guide).

Can a cleaned DPF last as long as a new one?

Yes. If cleaned properly and the engine fault is repaired, a cleaned filter performs almost like new.

Is it worth fitting a cheap aftermarket DPF?

They rarely last and often cause more problems. Cleaning your original unit is usually better value (not an actual quote but a guide).

Does DPF cleaning always work?

As long as the filter is not physically damaged or contaminated with oil/coolant, cleaning is highly effective in most cases.

How often should I get my DPF cleaned?

There’s no set interval, but if you mostly do short trips, a preventative clean every 12–18 months can save money (not an actual quote but a guide).