1994-1996 Mitsubishi Diamante Steering Column: Diagnosing Looseness and Noises
This guide covers the common failure symptoms, replacement costs, and what to inspect when buying a used steering column for your 1994-1996 Mitsubishi Diamante.
- The most common source for this part is a used OEM assembly from a salvage yard, as new parts are no longer made.
- Key failure symptoms include grinding/clicking noises, a loose-feeling wheel, and failure of the tilt-lock mechanism.
- A known issue for 1994 models is a TSB for horn buttons popping out of the steering wheel; check this on any used part.
- Replacement is an advanced DIY job (4/5 difficulty) due to the need to safely handle the airbag system.
Symptoms of a Failing Steering Column
A problem with the steering column can manifest in several ways, ranging from annoying noises to serious safety concerns. Because the column contains both mechanical and electrical parts, symptoms can be varied.
1. Unusual Noises When Turning
Clicking, grinding, or squeaking sounds when you turn the steering wheel often point to a problem within the column. These noises are typically caused by worn-out internal bearings that support the steering shaft. A grinding sound is a serious red flag, indicating metal-on-metal contact that requires immediate attention.
2. Loose or Wobbly Steering Wheel
If you can move the steering wheel up and down or side-to-side excessively, it's a sign of worn bushings or loose mounting bolts. This condition, sometimes called excessive "play," can make the car feel disconnected and hard to control accurately.
3. Tilt Adjustment Failure
A common failure is the inability of the tilt mechanism to lock in place. You might set your desired wheel position, but it falls to the lowest setting or moves freely while driving. This is usually due to a broken or worn internal locking pin or lever inside the column assembly.
4. Stiff or Binding Steering
If the steering wheel feels unusually stiff, rough, or seems to catch or "pop" at certain points while turning, it can be caused by a failing universal joint (U-joint) at the base of the column or binding bearings inside it. This can make steering effort inconsistent and unpredictable.
5. Electrical Problems
Since the turn signals, wipers, cruise control, and horn wiring run through the column, a fault can cause these systems to work intermittently or fail completely. This is often related to a bad clock spring or damaged wiring within the column housing.
Pro Tip: A Technical Service Bulletin (TSB #TSB9537A001) was issued for the 1994 Diamante because the horn buttons could spontaneously pop out of the steering wheel. If your horn isn't working or the buttons are loose, this may be the cause.
Buying a Used 1994-1996 Diamante Steering Column
New OEM and aftermarket steering columns for this generation of Diamante are largely discontinued and no longer available. Your most practical and cost-effective option is a quality used OEM part from a reputable auto recycler.
What to Inspect Before You Buy
When inspecting a used steering column, perform these checks:
- Check for Physical Damage: Look for cracks in the plastic housing, bent shafts, or damage to the electrical connectors. This could indicate the donor vehicle was in a serious accident.
- Test the Tilt Mechanism: Move the tilt lever and ensure the column moves smoothly through its range and, most importantly, locks firmly in each position.
- Inspect the U-Joint: Check the universal joint at the bottom of the column. It should pivot smoothly without any notchiness or binding.
- Examine the Wiring: Ensure all electrical harnesses and connectors are intact, with no cut wires or broken plastic clips. Damaged wiring can be very difficult to repair.
- Verify Included Components: Confirm if the column comes with the ignition switch, key, and the multifunction (turn signal/wiper) switches. Getting these included can save you time and money.
- Check the Horn Buttons: In light of the TSB, press on the horn buttons on the steering wheel (if included). They should feel secure and not loose or ready to fall out.
Known Issues, Recalls, and TSBs
While there are no major recalls directly affecting the steering column assembly for the 1994-1996 Mitsubishi Diamante, one Technical Service Bulletin is relevant:
- TSB #TSB9537A001: This bulletin notes that the horn buttons may spontaneously pop out of the steering wheel on some 1994 models. When inspecting a used part, ensure the horn buttons are secure.
No recalls were found specifically for steering column failure on these models. Other recalls for the Diamante line relate to different model years or other components like brake hoses or engine sensors.
Cost Comparison
Replacing a steering column involves significant labor. Here is an estimated cost breakdown for the 1994-1996 Diamante:
| Part Type | Estimated Cost |
|---|---|
| New OEM | Discontinued/Not Available |
| New Aftermarket | Not Generally Available |
| Used OEM | $75 - $200 |
| Remanufactured | Not Generally Available |
| Shop Labor | $400 - $700 |
| Total Estimated Cost (Used OEM) | $475 - $900 |
Cost estimates are based on national averages and may vary by location and supplier. Labor costs assume replacement of the entire column assembly.
Frequently Asked Questions (FAQ)
Is a wobbly steering wheel always a bad steering column?
Not always. While a loose column can cause a wobble, the issue could also be due to unbalanced tires, worn tie rods, bad ball joints, or a failing wheel bearing. A thorough inspection of the entire steering and suspension system is needed to pinpoint the cause.
Can I just replace the broken part inside my steering column?
Sometimes, but it's often impractical. Components like the internal bearings or tilt mechanism parts are not typically sold separately. For a vehicle of this age, replacing the entire column with a good used assembly is usually the most efficient and cost-effective repair.
Do I need a wheel alignment after replacing the steering column?
It is highly recommended. Although the column itself is not an alignment point, the process of disconnecting and reconnecting the steering shaft can slightly alter the steering wheel's center position. An alignment will ensure the steering wheel is straight when the wheels are pointed forward and prevent uneven tire wear.
Is it safe to replace a steering column myself?
This is an advanced DIY repair, rated 4 out of 5 for difficulty. The main risk involves the driver's side airbag. You must disconnect the battery and wait at least 15-30 minutes for the system's backup power to discharge before working on the column to prevent accidental deployment. Special tools like a steering wheel puller are also required. If you are not 100% confident in handling airbag systems, this job is best left to a professional.
Technical Specifications
OEM Part Numbers: MB616626 MR130358
The steering column assembly includes the main shaft, housing, tilt mechanism, and mounting points for the ignition switch, combination switch, and clock spring.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mitsubishi Diamante:
- Symptoms of a Failing Steering Column
- 1. Unusual Noises When Turning
- 2. Loose or Wobbly Steering Wheel
- 3. Tilt Adjustment Failure
- 4. Stiff or Binding Steering
- 5. Electrical Problems
- Buying a Used 1994-1996 Diamante Steering Column
- What to Inspect Before You Buy
- Known Issues, Recalls, and TSBs
- Cost Comparison
- Frequently Asked Questions (FAQ)
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