The Massey Ferguson 5445 tractor primary air filter part number is 3703703M91. The inner safety filter is 3703704M91.
Massey Ferguson 5445 Air Filter Details
Primary air filter part number
3703703M91
Inner safety air filter part number
3703704M91
Outer air filter part number
7068069M1
Air filter dimensions
Length: 9.4 in | Outside diameter: 4.1 in | Inside diameter: 0.4 in
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
300 hrs
Light use
600 hrs
Listed Filter Size Check
Length
9.4 in
Outside diameter
4.1 in
Inside diameter
0.4 in
These are practical inspection/replacement guide ranges for the utility tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Massey Ferguson 5445 Extra Air Filter Notes
Engine model
Perkins 4.4L
Engine displacement
4.4 L | 268.5 cu in
Engine horsepower
85 hp | 63.4 kW
Primary filter note
For the Massey Ferguson 5445, the listed primary air filter part number is 3703703M91. Match the number before buying because air cleaner setups can vary by engine, serial range and market.
Outer filter note
The listed outer air filter part number is 7068069M1.
Safety filter note
The listed inner safety air filter is 3703704M91. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Length: 9.4 in | Outside diameter: 4.1 in | Inside diameter: 0.4 in. Use dimensions as a second check, not as the only buying method.
Filter size note
The listed dimensions point to a mid-size element length at 9.4 in and normal outside diameter at 4.1 in. Use that as a fitment sanity check against the old filter.
Power range note
Use the power class to decide urgency. Higher airflow demand means less patience for questionable media, bad seals or packed pleats.
Engine airflow note
Engine size is useful context for service urgency, not a license to ignore the part number. The canister and seal decide fitment.
Service note
Clean loose dust from the air cleaner housing before pulling the filter. Never run the tractor with the filter removed, even for a quick test.
Massey Ferguson 5445 Air Filter FAQs
How do I avoid buying the wrong Massey Ferguson 5445 air filter?
If the old filter is missing, use 3703703M91 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
Why compare Massey Ferguson 5445 horsepower with filter dimensions?
Comparing power and element size helps catch bad cross-references. A tiny replacement for a harder-working engine should make you suspicious before installing it.
What should I buy for a full Massey Ferguson 5445 air-filter service?
For a full parts check, separate the service element from the safety element: buy the outer/primary service element first, then buy the inner safety element only if it is dirty, damaged or due. Do not accidentally order 7068069M1 when you meant the safety filter, or 3703704M91 when you meant the outer filter.
What size mistake should I watch for on a Massey Ferguson 5445 air filter?
This looks like a mid-size element. Use the dimensions to reject obvious bad cross-references, especially if the inner diameter or seal lip does not match the removed element.
Would I be strict with the Massey Ferguson 5445 air filter condition?
Yes. The power-to-filter-size relationship makes restriction and seal condition worth taking seriously. Replace a questionable element before heavy dusty work.
Why are there multiple air filter numbers for the Massey Ferguson 5445?
The outer filter is the dirt-catcher; the inner filter is the backup. Service them with different expectations instead of replacing both out of habit.
Why not stretch a dirty Massey Ferguson 5445 air filter under load?
Use the power class to decide urgency. Higher airflow demand means less patience for questionable media, bad seals or packed pleats.
Official information note
Mistakes do happen. Air filter specs can change by year, engine, serial range, market and air cleaner housing. Check the old filter, operator manual, parts book and official masseyferguson.com website before ordering or installing an air filter.
