Acura · Known Issues

2001 Acura MDX Problems: 2 Issues Every Owner Should Know

2001 model year · 1,900+ owner reports · Updated June 2026

According to Au7o's analysis of 1,900+ owner reports, the 2001 Acura MDX has 2 documented known issues, with 1 rated critical. The most serious is Timing Belt Tensioner and Water Pump Failure ($800-$1,500 repair). The most commonly reported issue is Timing Belt Tensioner and Water Pump Failure with 1,900 owner reports. Across all issues, repair costs range from $350 to $1,800. DIY maintenance guides at au7o.io.

All 2 Known Issues

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Community Reported

1,900 owners

On the 2001-2006 Acura MDX, first-generation MDX models with the J35 V6 are prone to timing belt tensioner bearing failure and simultaneous water pump leaks when the timing belt service is neglected past 105,000 miles. The hydraulic tensioner loses pressure, allowing the belt to skip teeth and potentially bend valves on this interference engine.

This issue also affects: Audi A5, Audi Q3, Cadillac Fleetwood

Common Symptoms

Ticking or rattling noise from front of engine on startup
Coolant leak from water pump weep hole
Engine runs rough after high-mileage
Squealing noise from belt area
Engine misfires at high RPM

How to Fix

Replace the timing belt, tensioner, water pump, and all idler pulleys as a complete kit at 105,000 miles or 7 years, whichever comes first. Use a genuine Honda/Acura timing belt kit. Never reuse the old tensioner even if it appears functional. This is a critical interference engine — a broken belt destroys the valves.

What Owners Are Using

Parts and tips from 1,900+ owners who fixed this issue

NoteThis is an INTERFERENCE engine. If the timing belt breaks, the pistons hit the valves and you are looking at a $3,000-5,000 head repair. Do the belt, tensioner, and water pump together at 100k miles — it is the single most important maintenance item on these engines.

Typical repair cost:$800 - $1,500

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1,900+ owners have reported this issue

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Community Reported

High Confidence1,900 reportsLast reported by owners Jun 2025Reviewed Mar 2026

On the 2001-2013 Acura MDX, first- and second-gen MDX power-steering high-pressure hose deteriorates and cracks at the metal-to-rubber crimp, weeping Honda PSF onto the subframe and causing whine, low-fluid warnings, and eventually pump damage. Internally, the rack develops 'morning sickness' - stiff steering when cold that loosens once warm - from worn input-shaft Teflon seals. Note: morning-sickness/rack failure is best-documented on 2003-2013 (Gen 1.5 and Gen 2); high-pressure hose failure spans 2001-2013.

Common Symptoms

PSF puddle under right side of engine
Whining noise on cold-start when turning wheel
Stiff steering when cold ('morning sickness')
Low PSF reservoir level
Reddish oil residue on subframe

How to Fix

Replace high-pressure hose with OEM (~$150 part, ~3 hrs labor; subframe must be lowered). Use ONLY Honda PSF - no universal/ATF. For morning sickness, replace the steering rack with a reman unit; do not band-aid with stop-leak additives.

Typical repair cost:$350 - $1,800

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0+ owners have reported this issue

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Community Reported

Medium ConfidenceVerified0 reportsLast reported by owners Invalid DateReviewed Jun 2026

Frequently Asked Questions

What are the most common Acura MDX problems?

According to Au7o's analysis of 1,900+ owner reports, the 2001-2001 Acura MDX has 2 documented issues. The most frequently reported are: Timing Belt Tensioner and Water Pump Failure, Power Steering High-Pressure Hose Cracking and Rack 'Morning Sickness' (2001-2013 MDX). Of these, 1 is rated critical and should be addressed promptly.

Is the Acura MDX reliable?

The 2001-2001 Acura MDX has 2 known issues documented across 1,900+ owner reports. 1 issue is rated critical: Timing Belt Tensioner and Water Pump Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Acura MDX problems?

Repair costs for known Acura MDX issues range from $350 to $1,800, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Timing Belt Tensioner and Water Pump Failure, typically costs $800-$1,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2001-2006 Acura MDX Timing Belt Tensioner and Water Pump Failure?

First-generation MDX models with the J35 V6 are prone to timing belt tensioner bearing failure and simultaneous water pump leaks when the timing belt service is neglected past 105,000 miles. The hydraulic tensioner loses pressure, allowing the belt to skip teeth and potentially b… Repairs typically run $800-$1,500. Severity: high.

What is the 2001-2013 Acura MDX Power Steering High-Pressure Hose Cracking and Rack 'Morning Sickness' (2001-2013 MDX)?

First- and second-gen MDX power-steering high-pressure hose deteriorates and cracks at the metal-to-rubber crimp, weeping Honda PSF onto the subframe and causing whine, low-fluid warnings, and eventually pump damage. Internally, the rack develops 'morning sickness' - stiff steeri… Repairs typically run $350-$1,800. Severity: medium.

2001 Acura MDX Problems: 2 Issues Every Owner Should Know

All 2 Known Issues

2001-2006 Acura MDX: Timing Belt Tensioner and Water Pump Failure#

Common Symptoms

How to Fix

What Owners Are Using

Research This Issue

2001-2013 Acura MDX: Power Steering High-Pressure Hose Cracking and Rack 'Morning Sickness' (2001-2013 MDX)#

Common Symptoms

How to Fix

Research This Issue

Other Acura Models

Frequently Asked Questions

What are the most common Acura MDX problems?

Is the Acura MDX reliable?

How much does it cost to fix common Acura MDX problems?

What is the 2001-2006 Acura MDX Timing Belt Tensioner and Water Pump Failure?

What is the 2001-2013 Acura MDX Power Steering High-Pressure Hose Cracking and Rack 'Morning Sickness' (2001-2013 MDX)?